diff --git a/.github/workflows/ruby.yml b/.github/workflows/ruby.yml
index 7a34368..763f639 100644
--- a/.github/workflows/ruby.yml
+++ b/.github/workflows/ruby.yml
@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.6, 2.7, 3.0, 3.1]
+        ruby: [3.0, 3.1, 3.2, 3.3]
 
     runs-on: ubuntu-latest
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index bfb3bdf..8e4fc51 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,8 +2,36 @@
 
 ## 1.5.0 - 2024-04-10
 
+### Added
+- Support Ruby 3.2 and 3.3
+- New endpoint for Simple Earn:
+  - `GET /sapi/v1/simple-earn/flexible/list` to query available Simple Earn flexible product list
+  - `GET /sapi/v1/simple-earn/locked/list` to query available Simple Earn locked product list
+  - `POST /sapi/v1/simple-earn/flexible/subscribe` to subscribe to a flexible product
+  - `POST /sapi/v1/simple-earn/locked/subscribe` to subscribe to a locked product
+  - `POST /sapi/v1/simple-earn/flexible/redeem` to redeem a flexible product
+  - `POST /sapi/v1/simple-earn/locked/redeem` to redeem a locked product
+  - `GET /sapi/v1/simple-earn/flexible/position` to get a flexible product position
+  - `GET /sapi/v1/simple-earn/locked/position` to get a locked product position
+  - `GET /sapi/v1/simple-earn/account` to get a simple account balances
+  - `GET /sapi/v1/simple-earn/flexible/history/subscriptionRecord` to get flexible subscription records
+  - `GET /sapi/v1/simple-earn/locked/history/subscriptionRecord` to get locked subscription records
+  - `GET /sapi/v1/simple-earn/flexible/history/redemptionRecord` to retrieve flexible redemption records
+  - `GET /sapi/v1/simple-earn/locked/history/redemptionRecord` to retrieve locked redemption records
+  - `GET /sapi/v1/simple-earn/flexible/history/rewardsRecord` to get flexible rewards history
+  - `GET /sapi/v1/simple-earn/locked/history/rewardsRecord` to get locked rewards history
+  - `POST /sapi/v1/simple-earn/flexible/setAutoSubscribe` to set an auto-subscription to a flexible product
+  - `POST /sapi/v1/simple-earn/locked/setAutoSubscribe` to set an auto-subscription to a locked product
+  - `GET /sapi/v1/simple-earn/flexible/personalLeftQuota` to get flexible personal left quota
+  - `GET /sapi/v1/simple-earn/locked/personalLeftQuota` to get locked personal left quota
+  - `GET /sapi/v1/simple-earn/flexible/subscriptionPreview` to get flexible subscription preview
+  - `GET /sapi/v1/simple-earn/locked/subscriptionPreview` to get locked subscription previews
+  - `GET /sapi/v1/simple-earn/flexible/history/rateHistory` to get a rate history
+  - `GET /sapi/v1/simple-earn/flexible/history/collateralRecord` to get collateral records
+
 ### Changed
 - Update dependencies
+- Drop support of Ruby 2.6 and 2.7
 
 ### Removed
 - Deprecated Savings endpoints:
diff --git a/examples/spot/simple_earn/collateral_record.rb b/examples/spot/simple_earn/collateral_record.rb
new file mode 100755
index 0000000..1bee4e0
--- /dev/null
+++ b/examples/spot/simple_earn/collateral_record.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.collateral_record)
diff --git a/examples/spot/simple_earn/flexible_auto_subscribe.rb b/examples/spot/simple_earn/flexible_auto_subscribe.rb
new file mode 100755
index 0000000..f69d52f
--- /dev/null
+++ b/examples/spot/simple_earn/flexible_auto_subscribe.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.flexible_auto_subscribe(productId: '1234', autoSubscribe: true))
diff --git a/examples/spot/simple_earn/flexible_personal_left_quota.rb b/examples/spot/simple_earn/flexible_personal_left_quota.rb
new file mode 100755
index 0000000..2fe8ab0
--- /dev/null
+++ b/examples/spot/simple_earn/flexible_personal_left_quota.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.flexible_personal_left_quota(productId: 'BTC001'))
diff --git a/examples/spot/simple_earn/flexible_product_list.rb b/examples/spot/simple_earn/flexible_product_list.rb
new file mode 100755
index 0000000..f4af0b0
--- /dev/null
+++ b/examples/spot/simple_earn/flexible_product_list.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.flexible_product_list)
diff --git a/examples/spot/simple_earn/flexible_product_position.rb b/examples/spot/simple_earn/flexible_product_position.rb
new file mode 100755
index 0000000..5d78aca
--- /dev/null
+++ b/examples/spot/simple_earn/flexible_product_position.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.flexible_product_position)
diff --git a/examples/spot/simple_earn/flexible_redeem_product.rb b/examples/spot/simple_earn/flexible_redeem_product.rb
new file mode 100755
index 0000000..934f592
--- /dev/null
+++ b/examples/spot/simple_earn/flexible_redeem_product.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.flexible_redeem_product(productId: 'BTC001'))
diff --git a/examples/spot/simple_earn/flexible_redemption_record.rb b/examples/spot/simple_earn/flexible_redemption_record.rb
new file mode 100755
index 0000000..7ae56dc
--- /dev/null
+++ b/examples/spot/simple_earn/flexible_redemption_record.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.flexible_redemption_record)
diff --git a/examples/spot/simple_earn/flexible_rewards_history.rb b/examples/spot/simple_earn/flexible_rewards_history.rb
new file mode 100755
index 0000000..eabe894
--- /dev/null
+++ b/examples/spot/simple_earn/flexible_rewards_history.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.flexible_rewards_history(type: 'BONUS'))
diff --git a/examples/spot/simple_earn/flexible_subscribe.rb b/examples/spot/simple_earn/flexible_subscribe.rb
new file mode 100755
index 0000000..1e3f768
--- /dev/null
+++ b/examples/spot/simple_earn/flexible_subscribe.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.flexible_subscribe(productId: 'BTC001', amount: 0.01))
diff --git a/examples/spot/simple_earn/flexible_subscription_preview.rb b/examples/spot/simple_earn/flexible_subscription_preview.rb
new file mode 100755
index 0000000..525f847
--- /dev/null
+++ b/examples/spot/simple_earn/flexible_subscription_preview.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.flexible_subscription_preview(productId: 'BTC001', amount: 1.0))
diff --git a/examples/spot/simple_earn/flexible_subscription_record.rb b/examples/spot/simple_earn/flexible_subscription_record.rb
new file mode 100755
index 0000000..43c0fa1
--- /dev/null
+++ b/examples/spot/simple_earn/flexible_subscription_record.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.flexible_subscription_record)
diff --git a/examples/spot/simple_earn/locked_auto_subscribe.rb b/examples/spot/simple_earn/locked_auto_subscribe.rb
new file mode 100755
index 0000000..9d16d1f
--- /dev/null
+++ b/examples/spot/simple_earn/locked_auto_subscribe.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.locked_auto_subscribe(positionId: '1234', autoSubscribe: true))
diff --git a/examples/spot/simple_earn/locked_personal_left_quota.rb b/examples/spot/simple_earn/locked_personal_left_quota.rb
new file mode 100755
index 0000000..8414c78
--- /dev/null
+++ b/examples/spot/simple_earn/locked_personal_left_quota.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.locked_personal_left_quota(projectId: 'Bnb*120'))
diff --git a/examples/spot/simple_earn/locked_product_list.rb b/examples/spot/simple_earn/locked_product_list.rb
new file mode 100755
index 0000000..6f7dcfc
--- /dev/null
+++ b/examples/spot/simple_earn/locked_product_list.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.locked_product_list)
diff --git a/examples/spot/simple_earn/locked_product_position.rb b/examples/spot/simple_earn/locked_product_position.rb
new file mode 100755
index 0000000..98c18b4
--- /dev/null
+++ b/examples/spot/simple_earn/locked_product_position.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.locked_product_position)
diff --git a/examples/spot/simple_earn/locked_redeem_product.rb b/examples/spot/simple_earn/locked_redeem_product.rb
new file mode 100755
index 0000000..caa8832
--- /dev/null
+++ b/examples/spot/simple_earn/locked_redeem_product.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.locked_redeem_product(positionId: '1234'))
diff --git a/examples/spot/simple_earn/locked_redemption_record.rb b/examples/spot/simple_earn/locked_redemption_record.rb
new file mode 100755
index 0000000..e036f88
--- /dev/null
+++ b/examples/spot/simple_earn/locked_redemption_record.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.locked_redemption_record)
diff --git a/examples/spot/simple_earn/locked_rewards_history.rb b/examples/spot/simple_earn/locked_rewards_history.rb
new file mode 100755
index 0000000..de7d68c
--- /dev/null
+++ b/examples/spot/simple_earn/locked_rewards_history.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.locked_rewards_history)
diff --git a/examples/spot/simple_earn/locked_subscribe.rb b/examples/spot/simple_earn/locked_subscribe.rb
new file mode 100755
index 0000000..44c6ff2
--- /dev/null
+++ b/examples/spot/simple_earn/locked_subscribe.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.locked_subscribe(projectId: 'Bnb*120', amount: 1.0))
diff --git a/examples/spot/simple_earn/locked_subscription_preview.rb b/examples/spot/simple_earn/locked_subscription_preview.rb
new file mode 100755
index 0000000..a36dad1
--- /dev/null
+++ b/examples/spot/simple_earn/locked_subscription_preview.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.locked_subscription_preview(projectId: 'Bnb*120', amount: 1.0))
diff --git a/examples/spot/simple_earn/locked_subscription_record.rb b/examples/spot/simple_earn/locked_subscription_record.rb
new file mode 100755
index 0000000..d0f084a
--- /dev/null
+++ b/examples/spot/simple_earn/locked_subscription_record.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.locked_subscription_record)
diff --git a/examples/spot/simple_earn/rate_history.rb b/examples/spot/simple_earn/rate_history.rb
new file mode 100755
index 0000000..1903fb1
--- /dev/null
+++ b/examples/spot/simple_earn/rate_history.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.rate_history(productId: 'BTC001'))
diff --git a/examples/spot/simple_earn/simple_earn_account.rb b/examples/spot/simple_earn/simple_earn_account.rb
new file mode 100755
index 0000000..22a4f9f
--- /dev/null
+++ b/examples/spot/simple_earn/simple_earn_account.rb
@@ -0,0 +1,12 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+$LOAD_PATH.unshift('./lib')
+
+require 'binance'
+require_relative '../../common'
+
+logger = Common.setup_logger
+
+client = Binance::Spot.new(key: '', secret: '')
+logger.info(client.simple_earn_account)
diff --git a/lib/binance/spot.rb b/lib/binance/spot.rb
index 1f53b9f..f926e8b 100644
--- a/lib/binance/spot.rb
+++ b/lib/binance/spot.rb
@@ -32,6 +32,7 @@ module Binance
   # - Margin
   # - Market
   # - Mining
+  # - SimpleEarn
   # - Stream
   # - Subaccount
   # - Trade
diff --git a/lib/binance/spot/simple_earn.rb b/lib/binance/spot/simple_earn.rb
index a39df17..9312f02 100644
--- a/lib/binance/spot/simple_earn.rb
+++ b/lib/binance/spot/simple_earn.rb
@@ -5,11 +5,145 @@ class Spot
     # all wallet endpoints
     # @see https://binance-docs.github.io/apidocs/spot/en/#wallet-endpoints
     module SimpleEarn
-      # All Coins' Information on 'simple earn' (USER_DATA)
+      # Get Simple Earn Flexible Product List (USER_DATA)
       #
-      # GET /sapi/v1/simple-earn/account'
+      # GET /sapi/v1/simple-earn/flexible/list
+      #
+      # @param kwargs [Hash]
+      # @option kwargs [String] :asset
+      # @option kwargs [Integer] :current Currently querying page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-simple-earn-flexible-product-list-user_data
+      def flexible_product_list(**kwargs)
+        @session.sign_request(:get, '/sapi/v1/simple-earn/flexible/list', params: kwargs)
+      end
+
+      # Get Simple Earn Locked Product List (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/locked/list
+      #
+      # @param kwargs [Hash]
+      # @option kwargs [String] :asset
+      # @option kwargs [Integer] :current Currently querying page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-simple-earn-locked-product-list-user_data
+      def locked_product_list(**kwargs)
+        @session.sign_request(:get, '/sapi/v1/simple-earn/locked/list', params: kwargs)
+      end
+
+      # Subscribe Flexible Product (TRADE)
+      #
+      # POST /sapi/v1/simple-earn/flexible/subscribe
+      #
+      # @param productId [String]
+      # @param amount [Float]
+      # @param kwargs [Hash]
+      # @option kwargs [Boolean] :autoSubscribe true or false, default true
+      # @option kwargs [String] :sourceAccount SPOT,FUND,ALL, default SPOT
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#subscribe-flexible-product-trade
+      def flexible_subscribe(productId:, amount:, **kwargs)
+        Binance::Utils::Validation.require_param('productId', productId)
+        Binance::Utils::Validation.require_param('amount', amount)
+
+        @session.sign_request(:post, '/sapi/v1/simple-earn/flexible/subscribe', params: kwargs.merge(
+          productId: productId,
+          amount: amount
+        ))
+      end
+
+      # Subscribe Locked Product (TRADE)
       #
-      # Get information of coins (in simple earn) for user.
+      # POST /sapi/v1/simple-earn/locked/subscribe
+      #
+      # @param projectId [String]
+      # @param amount [Float]
+      # @param kwargs [Hash]
+      # @option kwargs [Boolean] :autoSubscribe true or false, default true
+      # @option kwargs [String] :sourceAccount SPOT,FUND,ALL, default SPOT
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#subscribe-locked-product-trade
+      def locked_subscribe(projectId:, amount:, **kwargs)
+        Binance::Utils::Validation.require_param('projectId', projectId)
+        Binance::Utils::Validation.require_param('amount', amount)
+
+        @session.sign_request(:post, '/sapi/v1/simple-earn/locked/subscribe', params: kwargs.merge(
+          projectId: projectId,
+          amount: amount
+        ))
+      end
+
+      # Redeem Flexible Product (TRADE)
+      #
+      # POST /sapi/v1/simple-earn/flexible/redeem
+      #
+      # @param productId [String]
+      # @param kwargs [Hash]
+      # @option kwargs [Boolean] :redeemAll true or false, default true
+      # @option kwargs [Float] :amount if redeemAll is false, amount is mandatory
+      # @option kwargs [String] :destAccount SPOT,FUND,ALL, default SPOT
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#redeem-flexible-product-trade
+      def flexible_redeem_product(productId:, **kwargs)
+        Binance::Utils::Validation.require_param('productId', productId)
+
+        @session.sign_request(:post, '/sapi/v1/simple-earn/flexible/redeem', params: kwargs.merge(
+          productId: productId
+        ))
+      end
+
+      # Redeem Locked Product (TRADE)
+      #
+      # POST /sapi/v1/simple-earn/locked/redeem
+      #
+      # @param positionId [String]
+      # @param kwargs [Hash]
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#redeem-locked-product-trade
+      def locked_redeem_product(positionId:, **kwargs)
+        Binance::Utils::Validation.require_param('positionId', positionId)
+
+        @session.sign_request(:post, '/sapi/v1/simple-earn/locked/redeem', params: kwargs.merge(
+          positionId: positionId
+        ))
+      end
+
+      # Get Flexible Product Position (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/flexible/position
+      #
+      # @param kwargs [Hash]
+      # @option kwargs [String] :asset
+      # @option kwargs [String] :productId
+      # @option kwargs [Integer] :current Currently querying the page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-flexible-product-position-user_data
+      def flexible_product_position(**kwargs)
+        @session.sign_request(:get, '/sapi/v1/simple-earn/flexible/position', params: kwargs)
+      end
+
+      # Get Locked Product Position (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/locked/position
+      #
+      # @param kwargs [Hash]
+      # @option kwargs [String] :asset
+      # @option kwargs [String] :positionId
+      # @option kwargs [String] :projectId
+      # @option kwargs [Integer] :current Currently querying the page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-locked-product-position-user_data
+      def locked_product_position(**kwargs)
+        @session.sign_request(:get, '/sapi/v1/simple-earn/locked/position', params: kwargs)
+      end
+
+      # Simple Account(USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/account'
       #
       # @param kwargs [Hash]
       # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
@@ -17,7 +151,253 @@ module SimpleEarn
       def simple_earn_account(**kwargs)
         @session.sign_request(:get, '/sapi/v1/simple-earn/account', params: kwargs)
       end
-    
+
+      # Get Flexible Subscription Record (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/flexible/history/subscriptionRecord
+      #
+      # @param kwargs [Hash]
+      # @option kwargs [String] :productId
+      # @option kwargs [String] :purchaseId
+      # @option kwargs [String] :asset
+      # @option kwargs [Integer] :startTime
+      # @option kwargs [Integer] :endTime
+      # @option kwargs [Integer] :current Currently querying the page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-flexible-subscription-record-user_data
+      def flexible_subscription_record(**kwargs)
+        @session.sign_request(:get, '/sapi/v1/simple-earn/flexible/history/subscriptionRecord', params: kwargs)
+      end
+
+      # Get Locked Subscription Record (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/locked/history/subscriptionRecord
+      #
+      # @param kwargs [Hash]
+      # @option kwargs [String] :purchaseId
+      # @option kwargs [String] :asset
+      # @option kwargs [Integer] :startTime
+      # @option kwargs [Integer] :endTime
+      # @option kwargs [Integer] :current Currently querying the page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-locked-subscription-record-user_data
+      def locked_subscription_record(**kwargs)
+        @session.sign_request(:get, '/sapi/v1/simple-earn/locked/history/subscriptionRecord', params: kwargs)
+      end
+
+      # Get Flexible Redemption Record (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/flexible/history/redemptionRecord
+      #
+      # @param kwargs [Hash]
+      # @option kwargs [String] :productId
+      # @option kwargs [String] :redeemId
+      # @option kwargs [String] :asset
+      # @option kwargs [Integer] :startTime
+      # @option kwargs [Integer] :endTime
+      # @option kwargs [Integer] :current Currently querying the page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-flexible-redemption-record-user_data
+      def flexible_redemption_record(**kwargs)
+        @session.sign_request(:get, '/sapi/v1/simple-earn/flexible/history/redemptionRecord', params: kwargs)
+      end
+
+      # Get Locked Redemption Record (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/locked/history/redemptionRecord
+      #
+      # @param kwargs [Hash]
+      # @option kwargs [String] :positionId
+      # @option kwargs [String] :redeemId
+      # @option kwargs [String] :asset
+      # @option kwargs [Integer] :startTime
+      # @option kwargs [Integer] :endTime
+      # @option kwargs [Integer] :current Currently querying the page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-locked-redemption-record-user_data
+      def locked_redemption_record(**kwargs)
+        @session.sign_request(:get, '/sapi/v1/simple-earn/locked/history/redemptionRecord', params: kwargs)
+      end
+
+      # Get Flexible Rewards History (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/flexible/history/rewardsRecord
+      #
+      # @param type [String] BONUS - Bonus tiered APR, REALTIME Real-time APR, REWARDS Historical rewards
+      # @param kwargs [Hash]
+      # @option kwargs [String] :productId
+      # @option kwargs [String] :asset
+      # @option kwargs [Integer] :startTime
+      # @option kwargs [Integer] :endTime
+      # @option kwargs [Integer] :current Currently querying the page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-flexible-rewards-history-user_data
+      def flexible_rewards_history(type:, **kwargs)
+        Binance::Utils::Validation.require_param('type', type)
+
+        @session.sign_request(:get, '/sapi/v1/simple-earn/flexible/history/rewardsRecord', params: kwargs.merge(type: type))
+      end
+
+      # Get Locked Rewards History (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/locked/history/rewardsRecord
+      #
+      # @param kwargs [Hash]
+      # @option kwargs [String] :positionId
+      # @option kwargs [String] :asset
+      # @option kwargs [Integer] :startTime
+      # @option kwargs [Integer] :endTime
+      # @option kwargs [Integer] :current Currently querying the page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-locked-rewards-history-user_data
+      def locked_rewards_history(**kwargs)
+        @session.sign_request(:get, '/sapi/v1/simple-earn/locked/history/rewardsRecord', params: kwargs)
+      end
+
+      # Set Flexible Auto Subscribe (USER_DATA)
+      #
+      # POST /sapi/v1/simple-earn/flexible/setAutoSubscribe
+      #
+      # @param productId [String]
+      # @param autoSubscribe [Boolean] true or false
+      # @param kwargs [Hash]
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#set-flexible-auto-subscribe-user_data
+      def flexible_auto_subscribe(productId:, autoSubscribe:, **kwargs)
+        Binance::Utils::Validation.require_param('productId', productId)
+        Binance::Utils::Validation.require_param('autoSubscribe', autoSubscribe)
+
+        @session.sign_request(:post, '/sapi/v1/simple-earn/flexible/setAutoSubscribe', params: kwargs.merge(
+          productId: productId,
+          autoSubscribe: autoSubscribe
+        ))
+      end
+
+      # Set Locked Auto Subscribe (USER_DATA)
+      #
+      # POST /sapi/v1/simple-earn/locked/setAutoSubscribe
+      #
+      # @param positionId [String]
+      # @param autoSubscribe [Boolean] true or false
+      # @param kwargs [Hash]
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#set-locked-auto-subscribe-user_data
+      def locked_auto_subscribe(positionId:, autoSubscribe:, **kwargs)
+        Binance::Utils::Validation.require_param('positionId', positionId)
+        Binance::Utils::Validation.require_param('autoSubscribe', autoSubscribe)
+
+        @session.sign_request(:post, '/sapi/v1/simple-earn/locked/setAutoSubscribe', params: kwargs.merge(
+          positionId: positionId,
+          autoSubscribe: autoSubscribe
+        ))
+      end
+
+      # Get Flexible Personal Left Quota (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/flexible/personalLeftQuota
+      #
+      # @param productId [String]
+      # @param kwargs [Hash]
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-flexible-personal-left-quota-user_data
+      def flexible_personal_left_quota(productId:, **kwargs)
+        Binance::Utils::Validation.require_param('productId', productId)
+
+        @session.sign_request(:get, '/sapi/v1/simple-earn/flexible/personalLeftQuota', params: kwargs.merge(productId: productId))
+      end
+
+      # Get Locked Personal Left Quota (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/locked/personalLeftQuota
+      #
+      # @param projectId [String]
+      # @param kwargs [Hash]
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-locked-personal-left-quota-user_data
+      def locked_personal_left_quota(projectId:, **kwargs)
+        Binance::Utils::Validation.require_param('projectId', projectId)
+
+        @session.sign_request(:get, '/sapi/v1/simple-earn/locked/personalLeftQuota', params: kwargs.merge(projectId: projectId))
+      end
+
+      # Get Flexible Subscription Preview (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/flexible/subscriptionPreview
+      #
+      # @param productId [String]
+      # @param amount [Float]
+      # @param kwargs [Hash]
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-flexible-subscription-preview-user_data
+      def flexible_subscription_preview(productId:, amount:, **kwargs)
+        Binance::Utils::Validation.require_param('productId', productId)
+        Binance::Utils::Validation.require_param('amount', amount)
+
+        @session.sign_request(:get, '/sapi/v1/simple-earn/flexible/subscriptionPreview', params: kwargs.merge(
+          productId: productId,
+          amount: amount
+        ))
+      end
+
+      # Get Locked Subscription Preview (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/locked/subscriptionPreview
+      #
+      # @param projectId [String]
+      # @param amount [Float]
+      # @param kwargs [Hash]
+      # @option kwargs [Boolean] :autoSubscribe true or false, default true
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-locked-subscription-preview-user_data
+      def locked_subscription_preview(projectId:, amount:, **kwargs)
+        Binance::Utils::Validation.require_param('projectId', projectId)
+        Binance::Utils::Validation.require_param('amount', amount)
+
+        @session.sign_request(:get, '/sapi/v1/simple-earn/locked/subscriptionPreview', params: kwargs.merge(
+          projectId: projectId,
+          amount: amount
+        ))
+      end
+
+      # Get Rate History (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/flexible/history/rateHistory
+      #
+      # @param productId [String]
+      # @param kwargs [Hash]
+      # @option kwargs [Integer] :startTime
+      # @option kwargs [Integer] :endTime
+      # @option kwargs [Integer] :current Currently querying the page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-rate-history-user_data
+      def rate_history(productId:, **kwargs)
+        Binance::Utils::Validation.require_param('productId', productId)
+
+        @session.sign_request(:get, '/sapi/v1/simple-earn/flexible/history/rateHistory', params: kwargs.merge(productId: productId))
+      end
+
+      # Get Collateral Record (USER_DATA)
+      #
+      # GET /sapi/v1/simple-earn/flexible/history/collateralRecord
+      #
+      # @param kwargs [Hash]
+      # @option kwargs [String] :productId
+      # @option kwargs [Integer] :startTime
+      # @option kwargs [Integer] :endTime
+      # @option kwargs [Integer] :current Currently querying the page. Start from 1. Default:1
+      # @option kwargs [Integer] :size Default:10, Max:100
+      # @option kwargs [Integer] :recvWindow The value cannot be greater than 60000
+      # @see https://binance-docs.github.io/apidocs/spot/en/#get-collateral-record-user_data
+      def collateral_record(**kwargs)
+        @session.sign_request(:get, '/sapi/v1/simple-earn/flexible/history/collateralRecord', params: kwargs)
+      end
     end
   end
 end
diff --git a/spec/binance/spot/simple_earn/collateral_record_spec.rb b/spec/binance/spot/simple_earn/collateral_record_spec.rb
new file mode 100644
index 0000000..0272955
--- /dev/null
+++ b/spec/binance/spot/simple_earn/collateral_record_spec.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#collateral_record' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/history/collateralRecord' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return collateral record' do
+    spot_client_signed.collateral_record(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return collateral record' do
+      spot_client_signed.collateral_record(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/flexible_auto_subscribe_spec.rb b/spec/binance/spot/simple_earn/flexible_auto_subscribe_spec.rb
new file mode 100644
index 0000000..edb3e9f
--- /dev/null
+++ b/spec/binance/spot/simple_earn/flexible_auto_subscribe_spec.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#flexible_auto_subscribe' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/setAutoSubscribe' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { productId: '1234', autoSubscribe: true } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:post, path, status, body, params)
+  end
+
+  context 'validation productId' do
+    let(:params) { { productId: '', autoSubscribe: true } }
+    it 'should raise validation error without productId' do
+      expect { spot_client_signed.flexible_auto_subscribe(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  context 'validation autoSubscribe' do
+    let(:params) { { productId: '1234', autoSubscribe: '' } }
+    it 'should raise validation error without autoSubscribe' do
+      expect { spot_client_signed.flexible_auto_subscribe(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should set flexible auto subscribe' do
+    spot_client_signed.flexible_auto_subscribe(**params)
+    expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        productId: '1234',
+        autoSubscribe: true,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should set flexible auto subscribe' do
+      spot_client_signed.flexible_auto_subscribe(**params)
+      expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/flexible_personal_left_quota_spec.rb b/spec/binance/spot/simple_earn/flexible_personal_left_quota_spec.rb
new file mode 100644
index 0000000..92facbb
--- /dev/null
+++ b/spec/binance/spot/simple_earn/flexible_personal_left_quota_spec.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#flexible_personal_left_quota' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/personalLeftQuota' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { productId: 'BTC001' } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  context 'validation productId' do
+    let(:params) { { productId: '' } }
+    it 'should raise validation error without productId' do
+      expect { spot_client_signed.flexible_personal_left_quota(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should return flexible personal left quota' do
+    spot_client_signed.flexible_personal_left_quota(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        productId: 'BTC001',
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return flexible personal left quota' do
+      spot_client_signed.flexible_personal_left_quota(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/flexible_product_list_spec.rb b/spec/binance/spot/simple_earn/flexible_product_list_spec.rb
new file mode 100644
index 0000000..2d1541a
--- /dev/null
+++ b/spec/binance/spot/simple_earn/flexible_product_list_spec.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#flexible_product_list' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/list' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return simple earn flexible product list' do
+    spot_client_signed.flexible_product_list(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return simple earn flexible product list' do
+      spot_client_signed.flexible_product_list(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/flexible_product_position_spec.rb b/spec/binance/spot/simple_earn/flexible_product_position_spec.rb
new file mode 100644
index 0000000..7763ccf
--- /dev/null
+++ b/spec/binance/spot/simple_earn/flexible_product_position_spec.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#flexible_product_position' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/position' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return simple earn flexible product position' do
+    spot_client_signed.flexible_product_position(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        current: 1,
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return simple earn flexible product position' do
+      spot_client_signed.flexible_product_position(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/flexible_redeem_product_spec.rb b/spec/binance/spot/simple_earn/flexible_redeem_product_spec.rb
new file mode 100644
index 0000000..374248d
--- /dev/null
+++ b/spec/binance/spot/simple_earn/flexible_redeem_product_spec.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#flexible_redeem_product' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/redeem' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { productId: 'BTC001' } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:post, path, status, body, params)
+  end
+
+  context 'validation productId' do
+    let(:params) { { productId: '' } }
+    it 'should raise validation error without productId' do
+      expect { spot_client_signed.flexible_redeem_product(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should redeem flexible product' do
+    spot_client_signed.flexible_redeem_product(**params)
+    expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        productId: 'BTC001',
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should redeem flexible product' do
+      spot_client_signed.flexible_redeem_product(**params)
+      expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/flexible_redemption_record_spec.rb b/spec/binance/spot/simple_earn/flexible_redemption_record_spec.rb
new file mode 100644
index 0000000..d34fdfe
--- /dev/null
+++ b/spec/binance/spot/simple_earn/flexible_redemption_record_spec.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#flexible_redemption_record' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/history/redemptionRecord' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return flexible redemption record' do
+    spot_client_signed.flexible_redemption_record(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        current: 1,
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return flexible redemption record' do
+      spot_client_signed.flexible_redemption_record(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/flexible_rewards_history_spec.rb b/spec/binance/spot/simple_earn/flexible_rewards_history_spec.rb
new file mode 100644
index 0000000..1ffd3ea
--- /dev/null
+++ b/spec/binance/spot/simple_earn/flexible_rewards_history_spec.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#flexible_rewards_history' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/history/rewardsRecord' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { type: 'BONUS' } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  context 'validation type' do
+    let(:params) { { type: '' } }
+    it 'should raise validation error without type' do
+      expect { spot_client_signed.flexible_rewards_history(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should return flexible reward history' do
+    spot_client_signed.flexible_rewards_history(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        type: 'BONUS',
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return flexible reward history' do
+      spot_client_signed.flexible_rewards_history(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/flexible_subscribe_spec.rb b/spec/binance/spot/simple_earn/flexible_subscribe_spec.rb
new file mode 100644
index 0000000..9cf487c
--- /dev/null
+++ b/spec/binance/spot/simple_earn/flexible_subscribe_spec.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#flexible_subscribe' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/subscribe' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { productId: 'BTC001', amount: 0.01 } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:post, path, status, body, params)
+  end
+
+  context 'validation productId' do
+    let(:params) { { productId: '', amount: 0.01 } }
+    it 'should raise validation error without productId' do
+      expect { spot_client_signed.flexible_subscribe(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  context 'validation amount' do
+    let(:params) { { productId: 'BTC001', amount: '' } }
+    it 'should raise validation error without amount' do
+      expect { spot_client_signed.flexible_subscribe(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should subscribe to flexible product' do
+    spot_client_signed.flexible_subscribe(**params)
+    expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        productId: 'BTC001',
+        amount: 0.01,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should subscribe to flexible product' do
+      spot_client_signed.flexible_subscribe(**params)
+      expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/flexible_subscription_preview_spec.rb b/spec/binance/spot/simple_earn/flexible_subscription_preview_spec.rb
new file mode 100644
index 0000000..3f42429
--- /dev/null
+++ b/spec/binance/spot/simple_earn/flexible_subscription_preview_spec.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#flexible_subscription_preview' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/subscriptionPreview' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { productId: 'BTC001', amount: 0.01 } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  context 'validation productId' do
+    let(:params) { { productId: '', amount: 0.01 } }
+    it 'should raise validation error without productId' do
+      expect { spot_client_signed.flexible_subscription_preview(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  context 'validation amount' do
+    let(:params) { { productId: 'BTC001', amount: '' } }
+    it 'should raise validation error without amount' do
+      expect { spot_client_signed.flexible_subscription_preview(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should return locked subscription preview' do
+    spot_client_signed.flexible_subscription_preview(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        productId: 'BTC001',
+        amount: 0.01,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return locked subscription preview' do
+      spot_client_signed.flexible_subscription_preview(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/flexible_subscription_record_spec.rb b/spec/binance/spot/simple_earn/flexible_subscription_record_spec.rb
new file mode 100644
index 0000000..5256d81
--- /dev/null
+++ b/spec/binance/spot/simple_earn/flexible_subscription_record_spec.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#flexible_subscription_record' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/history/subscriptionRecord' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return flexible subscription record' do
+    spot_client_signed.flexible_subscription_record(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        current: 1,
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return flexible subscription record' do
+      spot_client_signed.flexible_subscription_record(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/locked_auto_subscribe_spec.rb b/spec/binance/spot/simple_earn/locked_auto_subscribe_spec.rb
new file mode 100644
index 0000000..7820ec3
--- /dev/null
+++ b/spec/binance/spot/simple_earn/locked_auto_subscribe_spec.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#locked_auto_subscribe' do
+  let(:path) { '/sapi/v1/simple-earn/locked/setAutoSubscribe' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { positionId: '1234', autoSubscribe: true } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:post, path, status, body, params)
+  end
+
+  context 'validation positionId' do
+    let(:params) { { positionId: '', autoSubscribe: true } }
+    it 'should raise validation error without positionId' do
+      expect { spot_client_signed.locked_auto_subscribe(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  context 'validation autoSubscribe' do
+    let(:params) { { positionId: '1234', autoSubscribe: '' } }
+    it 'should raise validation error without autoSubscribe' do
+      expect { spot_client_signed.locked_auto_subscribe(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should set locked auto subscribe' do
+    spot_client_signed.locked_auto_subscribe(**params)
+    expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        positionId: '1234',
+        autoSubscribe: true,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should set locked auto subscribe' do
+      spot_client_signed.locked_auto_subscribe(**params)
+      expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/locked_personal_left_quota_spec.rb b/spec/binance/spot/simple_earn/locked_personal_left_quota_spec.rb
new file mode 100644
index 0000000..23d95e3
--- /dev/null
+++ b/spec/binance/spot/simple_earn/locked_personal_left_quota_spec.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#locked_personal_left_quota' do
+  let(:path) { '/sapi/v1/simple-earn/locked/personalLeftQuota' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { projectId: 'Bnb*120' } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  context 'validation projectId' do
+    let(:params) { { projectId: '' } }
+    it 'should raise validation error without projectId' do
+      expect { spot_client_signed.locked_personal_left_quota(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should return locked personal left quota' do
+    spot_client_signed.locked_personal_left_quota(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        projectId: 'Bnb*120',
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return locked personal left quota' do
+      spot_client_signed.locked_personal_left_quota(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/locked_product_list_spec.rb b/spec/binance/spot/simple_earn/locked_product_list_spec.rb
new file mode 100644
index 0000000..596dc9d
--- /dev/null
+++ b/spec/binance/spot/simple_earn/locked_product_list_spec.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#locked_product_list_spec' do
+  let(:path) { '/sapi/v1/simple-earn/locked/list' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return simple earn locked product list' do
+    spot_client_signed.locked_product_list(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return simple earn locked product list' do
+      spot_client_signed.locked_product_list(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/locked_product_position_spec.rb b/spec/binance/spot/simple_earn/locked_product_position_spec.rb
new file mode 100644
index 0000000..7a6a9fd
--- /dev/null
+++ b/spec/binance/spot/simple_earn/locked_product_position_spec.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#locked_product_position' do
+  let(:path) { '/sapi/v1/simple-earn/locked/position' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return simple earn locked product position' do
+    spot_client_signed.locked_product_position(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return simple earn locked product position' do
+      spot_client_signed.locked_product_position(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/locked_redeem_product_spec.rb b/spec/binance/spot/simple_earn/locked_redeem_product_spec.rb
new file mode 100644
index 0000000..05aaad3
--- /dev/null
+++ b/spec/binance/spot/simple_earn/locked_redeem_product_spec.rb
@@ -0,0 +1,42 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#locked_redeem_product' do
+  let(:path) { '/sapi/v1/simple-earn/locked/redeem' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { positionId: '1234' } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:post, path, status, body, params)
+  end
+
+  context 'validation positionId' do
+    let(:params) { { positionId: '' } }
+    it 'should raise validation error without positionId' do
+      expect { spot_client_signed.locked_redeem_product(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should redeem locked product' do
+    spot_client_signed.locked_redeem_product(**params)
+    expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        positionId: '1234',
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should redeem locked product' do
+      spot_client_signed.locked_redeem_product(**params)
+      expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/locked_redemption_record_spec.rb b/spec/binance/spot/simple_earn/locked_redemption_record_spec.rb
new file mode 100644
index 0000000..8f8af75
--- /dev/null
+++ b/spec/binance/spot/simple_earn/locked_redemption_record_spec.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#locked_redemption_record' do
+  let(:path) { '/sapi/v1/simple-earn/locked/history/redemptionRecord' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return locked redemption record' do
+    spot_client_signed.locked_redemption_record(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return locked redemption record' do
+      spot_client_signed.locked_redemption_record(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/locked_rewards_history_spec.rb b/spec/binance/spot/simple_earn/locked_rewards_history_spec.rb
new file mode 100644
index 0000000..ff0b7b3
--- /dev/null
+++ b/spec/binance/spot/simple_earn/locked_rewards_history_spec.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#locked_rewards_history' do
+  let(:path) { '/sapi/v1/simple-earn/locked/history/rewardsRecord' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return locked rewards history' do
+    spot_client_signed.locked_rewards_history(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return locked rewards history' do
+      spot_client_signed.locked_rewards_history(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/locked_subscribe_spec.rb b/spec/binance/spot/simple_earn/locked_subscribe_spec.rb
new file mode 100644
index 0000000..deebdac
--- /dev/null
+++ b/spec/binance/spot/simple_earn/locked_subscribe_spec.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#locked_subscribe' do
+  let(:path) { '/sapi/v1/simple-earn/locked/subscribe' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { projectId: 'Bnb*120', amount: 1.0 } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:post, path, status, body, params)
+  end
+
+  context 'validation projectId' do
+    let(:params) { { projectId: '', amount: 1.0 } }
+    it 'should raise validation error without projectId' do
+      expect { spot_client_signed.locked_subscribe(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  context 'validation amount' do
+    let(:params) { { projectId: 'Bnb*120', amount: '' } }
+    it 'should raise validation error without amount' do
+      expect { spot_client_signed.locked_subscribe(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should subscribe to locked product' do
+    spot_client_signed.locked_subscribe(**params)
+    expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        projectId: 'Bnb*120',
+        amount: 1.0,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should subscribe to locked product' do
+      spot_client_signed.locked_subscribe(**params)
+      expect(send_a_request_with_signature(:post, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/locked_subscription_preview_spec.rb b/spec/binance/spot/simple_earn/locked_subscription_preview_spec.rb
new file mode 100644
index 0000000..9fb92cc
--- /dev/null
+++ b/spec/binance/spot/simple_earn/locked_subscription_preview_spec.rb
@@ -0,0 +1,50 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#locked_subscription_preview' do
+  let(:path) { '/sapi/v1/simple-earn/locked/subscriptionPreview' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { projectId: 'Bnb*120', amount: 1.0 } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  context 'validation projectId' do
+    let(:params) { { projectId: '', amount: 1.0 } }
+    it 'should raise validation error without projectId' do
+      expect { spot_client_signed.locked_subscription_preview(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  context 'validation amount' do
+    let(:params) { { projectId: 'Bnb*120', amount: '' } }
+    it 'should raise validation error without amount' do
+      expect { spot_client_signed.locked_subscription_preview(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should return locked subscription preview' do
+    spot_client_signed.locked_subscription_preview(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        projectId: '1234',
+        amount: 1.0,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return locked subscription preview' do
+      spot_client_signed.locked_subscription_preview(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/locked_subscription_record_spec.rb b/spec/binance/spot/simple_earn/locked_subscription_record_spec.rb
new file mode 100644
index 0000000..5e724ab
--- /dev/null
+++ b/spec/binance/spot/simple_earn/locked_subscription_record_spec.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#locked_subscription_record' do
+  let(:path) { '/sapi/v1/simple-earn/locked/history/subscriptionRecord' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return locked subscription record' do
+    spot_client_signed.locked_subscription_record(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return locked subscription record' do
+      spot_client_signed.locked_subscription_record(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/rate_history_spec.rb b/spec/binance/spot/simple_earn/rate_history_spec.rb
new file mode 100644
index 0000000..ce7c2f1
--- /dev/null
+++ b/spec/binance/spot/simple_earn/rate_history_spec.rb
@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#rate_history' do
+  let(:path) { '/sapi/v1/simple-earn/flexible/history/rateHistory' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:ts) { '1708632518001' }
+  let(:params) { { productId: 'BTC001' } }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  context 'validation productId' do
+    let(:params) { { productId: '' } }
+    it 'should raise validation error without productId' do
+      expect { spot_client_signed.rate_history(**params) }.to raise_error(Binance::RequiredParameterError)
+    end
+  end
+
+  it 'should return rate history' do
+    spot_client_signed.rate_history(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        productId: 'BTC001',
+        size: 10,
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return rate history' do
+      spot_client_signed.rate_history(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end
diff --git a/spec/binance/spot/simple_earn/simple_earn_account_spec.rb b/spec/binance/spot/simple_earn/simple_earn_account_spec.rb
new file mode 100644
index 0000000..513f8ce
--- /dev/null
+++ b/spec/binance/spot/simple_earn/simple_earn_account_spec.rb
@@ -0,0 +1,33 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe Binance::Spot::SimpleEarn, '#simple_earn_account' do
+  let(:path) { '/sapi/v1/simple-earn/account' }
+  let(:body) { fixture('response.json') }
+  let(:status) { 200 }
+  let(:params) { {} }
+
+  before do
+    mocking_signature_and_ts(**params)
+    stub_binance_sign_request(:get, path, status, body, params)
+  end
+
+  it 'should return simple earn account information' do
+    spot_client_signed.simple_earn_account(**params)
+    expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+  end
+
+  context 'with params' do
+    let(:params) do
+      {
+        recvWindow: 10_000
+      }
+    end
+
+    it 'should return simple earn account information' do
+      spot_client_signed.simple_earn_account(**params)
+      expect(send_a_request_with_signature(:get, path, params)).to have_been_made
+    end
+  end
+end