diff --git a/README.md b/README.md
index 9d0f2880..cef16d25 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,13 @@ Avalanche SDK TypeScript provides a complete set of tools and libraries for deve
 
 ## Available SDKs
 
+### [Chains SDK](./chains/)
+
+The `Chains` module provides a collection of Avalanche Layer 1 (L1) chain configurations in a standardized format. These configurations are useful for interacting with Avalanche networks in a consistent and type-safe way, and is compatible with libraries like [viem](https://viem.sh/).
+
+- ChainConfig compatible with libraries like `viem`
+- Can be used with other Avalanche SDKs like `client` and `interchain`
+
 ### [Client SDK](./client/)
 The main Avalanche client SDK for interacting with Avalanche nodes and building blockchain applications.
 
diff --git a/chains/.gitignore b/chains/.gitignore
new file mode 100644
index 00000000..da0a94d9
--- /dev/null
+++ b/chains/.gitignore
@@ -0,0 +1,22 @@
+/models
+/models/errors
+/types
+/node_modules
+/lib
+/sdk
+/funcs
+/react-query
+/mcp-server
+/hooks
+/index.*
+/core.*
+/bin
+/cjs
+/esm
+/dist
+/.tsbuildinfo
+/.eslintcache
+/.tshy
+/.tshy-*
+/__tests__
+/coverage
\ No newline at end of file
diff --git a/chains/README.md b/chains/README.md
new file mode 100644
index 00000000..09d50379
--- /dev/null
+++ b/chains/README.md
@@ -0,0 +1,91 @@
+# Avalanche L1 Chains
+
+The `Chains` module provides a collection of Avalanche Layer 1 (L1) chain configurations in a standardized format. These configurations are useful for interacting with Avalanche networks in a consistent and type-safe way, and is compatible with libraries like [viem](https://viem.sh/).
+
+## Requirements
+
+- Node.js >= 20.0.0
+- TypeScript >= 5.0.0
+
+## Installation
+
+```bash
+npm install @avalanche-sdk/chains
+```
+
+## Usage
+
+Using any of the listed L1s from the `chains` module is very simple:
+
+```typescript
+import { avalancheFuji, dispatch } from "@avalanche-sdk/chains";
+
+console.log(avalancheFuji.id);
+```
+
+## ChainConfig
+
+The `ChainConfig` interface extends `viem`'s [official config](https://viem.sh/docs/chains/introduction) by enforcing the following Teleporter related properties.
+
+This config is used in other Avalanche SDKs like `interchain` and `client`.
+
+```typescript
+export interface ChainConfig extends Chain {
+  blockchainId: string;
+  contracts: {
+    [key: string]: {
+      address: Address;
+    };
+    teleporterRegistry: {
+      address: Address;
+    };
+    teleporterManager: {
+      address: Address;
+    };
+  }
+}
+```
+
+## Extending ChainConfig
+
+If you want to test chains locally which are not in this module, you can easily define the chain config like this (see Viem's [Custom Chains](https://viem.sh/docs/chains/introduction#custom-chains)):
+
+```typescript
+import { defineChain } from 'viem'
+ 
+export const zora = defineChain({
+  id: 7777777,
+  name: 'Zora',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'Ether',
+    symbol: 'ETH',
+  },
+  rpcUrls: {
+    default: {
+      http: ['https://rpc.zora.energy'],
+      webSocket: ['wss://rpc.zora.energy'],
+    },
+  },
+  blockExplorers: {
+    default: { name: 'Explorer', url: 'https://explorer.zora.energy' },
+  },
+  contracts: {
+    multicall3: {
+      address: '0xcA11bde05977b3631167028862bE2a173976CA11',
+      blockCreated: 5882,
+    },
+    teleporterRegistry: {
+      address: '0xF86Cb19Ad8405AEFa7d09C778215D2Cb6eBfB228',
+    },
+    teleporterManager: {
+      address: '0x253b2784c75e510dD0fF1da844684a1aC0aa5fcf',
+    },
+  },
+  blockchainId: 'abc';
+})
+```
+
+## Contributing
+
+You can expand the official `Chains` module by adding the chain config following the above interface.
diff --git a/chains/package-lock.json b/chains/package-lock.json
new file mode 100644
index 00000000..02b1896e
--- /dev/null
+++ b/chains/package-lock.json
@@ -0,0 +1,271 @@
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+}
diff --git a/chains/package.json b/chains/package.json
new file mode 100644
index 00000000..600d5389
--- /dev/null
+++ b/chains/package.json
@@ -0,0 +1,48 @@
+{
+  "name": "@avalanche-sdk/chains",
+  "version": "0.0.1-alpha.1",
+  "description": "Chains package for Avalanche L1s",
+  "type": "module",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "engines": {
+    "node": ">=20.0.0"
+  },
+  "scripts": {
+    "build": "npx tsc"
+  },
+  "files": [
+    "dist",
+    "src",
+    "!src/**/*.test.ts",
+    "!src/**/fixtures/**"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/ava-labs/avalanche-sdk-typescript.git",
+    "directory": "chains"
+  },
+  "keywords": [
+    "chains",
+    "l1",
+    "AvalancheL1",
+    "subnets"
+  ],
+  "author": "Raj Ranjan",
+  "license": "BSD-3-Clause",
+  "bugs": {
+    "url": "https://github.com/ava-labs/avalanche-sdk-typescript/issues"
+  },
+  "homepage": "https://github.com/ava-labs/avalanche-sdk-typescript#readme",
+  "peerDependencies": {
+    "viem": "^2.33.1"
+  },
+  "devDependencies": {
+    "@types/node": "^20.0.0",
+    "typescript": "^5.0.0"
+  },
+  "sideEffects": false,
+  "exports": {
+    ".": "./dist/index.js"
+  }
+}
diff --git a/chains/src/chains/index.ts b/chains/src/chains/index.ts
new file mode 100644
index 00000000..2670871d
--- /dev/null
+++ b/chains/src/chains/index.ts
@@ -0,0 +1,16 @@
+import { ChainConfig } from "../types/chainConfig";
+import { avalancheFuji } from "./testnet/avalancheFuji";
+import { dispatch } from "./testnet/dispatch";
+
+export { avalancheFuji } from "./testnet/avalancheFuji";
+export { dispatch } from "./testnet/dispatch";
+
+const chainsMap = new Map<string | number, ChainConfig>();
+[
+    avalancheFuji,
+    dispatch,
+].forEach((chain) => {
+    chainsMap.set(chain.id, chain);
+    chainsMap.set(chain.name, chain);
+});
+export { chainsMap };
\ No newline at end of file
diff --git a/chains/src/chains/testnet/avalancheFuji.ts b/chains/src/chains/testnet/avalancheFuji.ts
new file mode 100644
index 00000000..9d901e3f
--- /dev/null
+++ b/chains/src/chains/testnet/avalancheFuji.ts
@@ -0,0 +1,36 @@
+import { defineChain } from 'viem';
+import { ChainConfig } from '../../types/chainConfig';
+
+export const avalancheFuji = defineChain({
+    id: 43_113,
+    name: 'Avalanche Fuji',
+    nativeCurrency: {
+        decimals: 18,
+        name: 'Avalanche Fuji',
+        symbol: 'AVAX',
+    },
+    rpcUrls: {
+        default: { http: ['https://api.avax-test.network/ext/bc/C/rpc'] },
+    },
+    blockExplorers: {
+        default: {
+            name: 'SnowTrace',
+            url: 'https://subnets-test.avax.network/c-chain',
+            apiUrl: 'https://glacier-api.avax.network/v1/chains/43113',
+        },
+    },
+    contracts: {
+        multicall3: {
+            address: '0xca11bde05977b3631167028862be2a173976ca11',
+            blockCreated: 7096959,
+        },
+        teleporterRegistry: {
+            address: '0xF86Cb19Ad8405AEFa7d09C778215D2Cb6eBfB228',
+        },
+        teleporterManager: {
+            address: '0x253b2784c75e510dD0fF1da844684a1aC0aa5fcf',
+        },
+    },
+    testnet: true,
+    blockchainId: '0x7fc93d85c6d62c5b2ac0b519c87010ea5294012d1e407030d6acd0021cac10d5',
+}) as ChainConfig;
diff --git a/chains/src/chains/testnet/dispatch.ts b/chains/src/chains/testnet/dispatch.ts
new file mode 100644
index 00000000..32e632f5
--- /dev/null
+++ b/chains/src/chains/testnet/dispatch.ts
@@ -0,0 +1,34 @@
+import { defineChain } from "viem";
+import { ChainConfig } from "../../types/chainConfig";
+
+export const dispatch = defineChain({
+  id: 779672,
+  name: 'Dispatch L1',
+  blockchainId: '0x9f3be606497285d0ffbb5ac9ba24aa60346a9b1812479ed66cb329f394a4b1c7',
+  nativeCurrency: {
+    decimals: 18,
+    name: 'DIS',
+    symbol: 'DIS',
+  },
+  rpcUrls: {
+    default: {
+      http: ['https://subnets.avax.network/dispatch/testnet/rpc'],
+    },
+  },
+  blockExplorers: {
+    default: {
+      name: 'Dispatch Explorer',
+      url: 'https://subnets-test.avax.network/dispatch',
+      apiUrl: 'https://glacier-api.avax.network/v1/chains/779672',
+    },
+  },
+  contracts: {
+    teleporterRegistry: {
+        address: '0xF86Cb19Ad8405AEFa7d09C778215D2Cb6eBfB228',
+    },
+    teleporterManager: {
+        address: '0x253b2784c75e510dD0fF1da844684a1aC0aa5fcf',
+    },
+  },
+  testnet: true
+}) as ChainConfig;
\ No newline at end of file
diff --git a/chains/src/index.ts b/chains/src/index.ts
new file mode 100644
index 00000000..e0290337
--- /dev/null
+++ b/chains/src/index.ts
@@ -0,0 +1,3 @@
+export type { ChainConfig } from './types/chainConfig';
+export * from './chains';
+export { getChainByChainId, getChainByName } from './utils/getChain';
diff --git a/chains/src/types/chainConfig.ts b/chains/src/types/chainConfig.ts
new file mode 100644
index 00000000..da677296
--- /dev/null
+++ b/chains/src/types/chainConfig.ts
@@ -0,0 +1,17 @@
+import { Address } from "viem";
+import { Chain } from "viem/chains";
+
+export interface ChainConfig extends Chain {
+    blockchainId: string;
+    contracts: {
+        [key: string]: {
+            address: Address;
+        };
+        teleporterRegistry: {
+            address: Address;
+        };
+        teleporterManager: {
+            address: Address;
+        };
+    }
+}
\ No newline at end of file
diff --git a/chains/src/utils/getChain.ts b/chains/src/utils/getChain.ts
new file mode 100644
index 00000000..6be45526
--- /dev/null
+++ b/chains/src/utils/getChain.ts
@@ -0,0 +1,10 @@
+import { chainsMap } from '../chains'
+import { ChainConfig } from '../types/chainConfig';
+
+export function getChainByChainId(chainId: string): ChainConfig | undefined {
+    return chainsMap.get(chainId);
+}
+
+export function getChainByName(chainName: string): ChainConfig | undefined {
+    return chainsMap.get(chainName);
+}
diff --git a/chains/tsconfig.json b/chains/tsconfig.json
new file mode 100644
index 00000000..5e20adb0
--- /dev/null
+++ b/chains/tsconfig.json
@@ -0,0 +1,43 @@
+{
+    "compilerOptions": {
+      "incremental": true,
+      "tsBuildInfoFile": ".tsbuildinfo",
+      "target": "ES2022",
+      "lib": ["ES2022", "DOM", "DOM.Iterable"],
+      "jsx": "react-jsx",
+  
+      "module": "ES2022",
+      "moduleResolution": "bundler",
+  
+      "allowJs": true,
+  
+      "declaration": true,
+      "declarationMap": true,
+      "sourceMap": true,
+      "outDir": "./dist",
+      "rootDir": "./src",
+      
+  
+      // https://github.com/tsconfig/bases/blob/a1bf7c0fa2e094b068ca3e1448ca2ece4157977e/bases/strictest.json
+      "strict": true,
+      "allowUnusedLabels": false,
+      "allowUnreachableCode": false,
+      "exactOptionalPropertyTypes": true,
+      "useUnknownInCatchVariables": true,
+      "noFallthroughCasesInSwitch": true,
+      "noImplicitOverride": true,
+      "noImplicitReturns": true,
+      "noPropertyAccessFromIndexSignature": true,
+      "noUncheckedIndexedAccess": true,
+      "noUnusedLocals": true,
+      "noUnusedParameters": true,
+      "isolatedModules": true,
+      "checkJs": true,
+      "esModuleInterop": true,
+      "skipLibCheck": true,
+      "forceConsistentCasingInFileNames": true
+    },
+    "include": ["src/**/*"],
+    "exclude": ["node_modules", "dist"]
+  }
+  
\ No newline at end of file