diff --git a/specification/DigitalOcean-public.v2.yaml b/specification/DigitalOcean-public.v2.yaml
index 18d9497a1..9a5103102 100644
--- a/specification/DigitalOcean-public.v2.yaml
+++ b/specification/DigitalOcean-public.v2.yaml
@@ -651,6 +651,14 @@ paths:
     post:
       $ref: 'resources/apps/apps_revert_rollback.yml'
 
+  /v2/apps/buildpacks:
+    get:
+      $ref: 'resources/apps/apps_list_buildpacks.yml'
+
+  /v2/apps/{app_id}/upgrade_buildpack:
+    post:
+      $ref: 'resources/apps/apps_upgrade_buildpack.yml'
+
   /v2/cdn/endpoints:
     get:
       $ref: 'resources/cdn/cdn_list_endpoints.yml'
diff --git a/specification/resources/apps/apps_list_buildpacks.yml b/specification/resources/apps/apps_list_buildpacks.yml
new file mode 100755
index 000000000..494f2b552
--- /dev/null
+++ b/specification/resources/apps/apps_list_buildpacks.yml
@@ -0,0 +1,35 @@
+operationId: apps_list_buildpacks
+
+summary: List Buildpacks
+
+description: >-
+  List all buildpacks available on App Platform.
+
+
+  Buildpacks are one of the ways App Platform can build apps from source. For more information, see: [Builds with Buildpacks](https://docs.digitalocean.com/products/app-platform/reference/buildpacks/).
+
+tags:
+  - Apps
+
+responses:
+  "200":
+    $ref: responses/list_buildpacks.yml
+
+  "401":
+    $ref: ../../shared/responses/unauthorized.yml
+
+  "429":
+    $ref: "../../shared/responses/too_many_requests.yml"
+
+  "500":
+    $ref: ../../shared/responses/server_error.yml
+
+  default:
+    $ref: ../../shared/responses/unexpected_error.yml
+
+x-codeSamples:
+  - $ref: "examples/curl/apps_list_buildpacks.yml"
+
+security:
+  - bearer_auth:
+      - "read"
diff --git a/specification/resources/apps/apps_upgrade_buildpack.yml b/specification/resources/apps/apps_upgrade_buildpack.yml
new file mode 100644
index 000000000..c65b3f97c
--- /dev/null
+++ b/specification/resources/apps/apps_upgrade_buildpack.yml
@@ -0,0 +1,54 @@
+operationId: apps_upgrade_buildpack
+
+summary: Upgrade App Buildpack
+
+description: |
+  Upgrade an app's buildpack to a newer major version line.
+
+
+  The buildpack must already be part of the app's build
+  configuration. The "Retrieve an Existing App" operation will return the app's build configuration. In it, a buildpack
+  with a `latest` value of `false` indicates that an major version upgrade is available.
+
+
+  Before upgrading a buildpack, make sure to inspect its documentation page for the changelog as major version upgrades
+  are likely to introduce breaking changes to the buildpack's operation.
+
+tags:
+  - Apps
+
+parameters:
+  - $ref: parameters.yml#/app_id
+
+requestBody:
+  content:
+    application/json:
+      schema:
+        $ref: models/apps_upgrade_buildpack_request.yml
+  required: true
+
+responses:
+  "200":
+    $ref: responses/apps_upgrade_buildpack.yml
+
+  "401":
+    $ref: ../../shared/responses/unauthorized.yml
+
+  "404":
+    $ref: "../../shared/responses/not_found.yml"
+
+  "429":
+    $ref: "../../shared/responses/too_many_requests.yml"
+
+  "500":
+    $ref: ../../shared/responses/server_error.yml
+
+  default:
+    $ref: ../../shared/responses/unexpected_error.yml
+
+x-codeSamples:
+  - $ref: "examples/curl/apps_upgrade_buildpack.yml"
+
+security:
+  - bearer_auth:
+      - "write"
diff --git a/specification/resources/apps/examples/curl/apps_list_buildpacks.yml b/specification/resources/apps/examples/curl/apps_list_buildpacks.yml
new file mode 100644
index 000000000..a3dbbd800
--- /dev/null
+++ b/specification/resources/apps/examples/curl/apps_list_buildpacks.yml
@@ -0,0 +1,6 @@
+lang: cURL
+source: |-
+  curl -X GET \
+    -H "Content-Type: application/json" \
+    -H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
+    "https://api.digitalocean.com/v2/apps/buildpacks"
diff --git a/specification/resources/apps/examples/curl/apps_upgrade_buildpack.yml b/specification/resources/apps/examples/curl/apps_upgrade_buildpack.yml
new file mode 100644
index 000000000..5cce58fa5
--- /dev/null
+++ b/specification/resources/apps/examples/curl/apps_upgrade_buildpack.yml
@@ -0,0 +1,7 @@
+lang: cURL
+source: |-
+  curl -X POST \
+    -H "Content-Type: application/json" \
+    -H "Authorization: Bearer $DIGITALOCEAN_TOKEN" \
+    -d '{ "id": "digitalocean/node" }' \
+    "https://api.digitalocean.com/v2/apps/{app_id}/upgrade_buildpack"
diff --git a/specification/resources/apps/models/app.yml b/specification/resources/apps/models/app.yml
index 0651cec55..cca68f0d8 100755
--- a/specification/resources/apps/models/app.yml
+++ b/specification/resources/apps/models/app.yml
@@ -74,8 +74,10 @@ properties:
     example: 2020-12-01T00:42:16Z
   pinned_deployment:
     allOf:
-      - description: The deployment that the app is pinned to.
+      - description: The deployment that the app is pinned to following a rollback.
       - $ref: apps_deployment.yml
+  build_config:
+    $ref: app_build_config.yml
 required:
-- spec
+  - spec
 type: object
diff --git a/specification/resources/apps/models/app_build_config.yml b/specification/resources/apps/models/app_build_config.yml
new file mode 100644
index 000000000..9951e0bb0
--- /dev/null
+++ b/specification/resources/apps/models/app_build_config.yml
@@ -0,0 +1,19 @@
+title: The app's build configuration.
+type: object
+properties:
+  cnb_versioning:
+    type: object
+    description: >-
+      Versioning configuration for Cloud Native Buildpacks-based builds.
+
+
+      Buildpacks are one of the ways App Platform can build apps from source. For more information, see:
+      [Builds with Buildpacks](https://docs.digitalocean.com/products/app-platform/reference/buildpacks/).
+    properties:
+      buildpacks:
+        type: array
+        description: >-
+          A list of versioned buildpacks used for the app's builds. Buildpacks are versioned at the major semver version
+          component, therefore exact version numbers are not available in the app's build configuration.
+        items:
+          $ref: apps_buildpack.yml
diff --git a/specification/resources/apps/models/apps_buildpack.yml b/specification/resources/apps/models/apps_buildpack.yml
new file mode 100755
index 000000000..704a13153
--- /dev/null
+++ b/specification/resources/apps/models/apps_buildpack.yml
@@ -0,0 +1,38 @@
+properties:
+  id:
+    title: The buildpack's ID.
+    type: string
+    example: digitalocean/node
+  version:
+    title: The buildpack's version number.
+    type: string
+    format: semver
+    example: "1.2.0"
+  major_version:
+    title: The major component of the buildpack's version number. This signifies the "major version line" of the buildpack.
+    type: integer
+    format: int32
+    example: 1
+  latest:
+    title: >-
+      Indicates whether the buildpack is on the latest major version line available. A value of `false` means there is
+      another buildpack with the same ID and a newer major version.
+    type: boolean
+    example: true
+  name:
+    title: A human-friendly name.
+    type: string
+    example: Node.js
+  description:
+    items:
+      type: string
+    title: A description of the buildpack's purpose and steps performed at build time.
+    type: array
+    example:
+      - Install Node.js, NPM, and Yarn.
+      - Install dependencies using `npm ci` or `yarn install`.
+  docs_link:
+    title: A link to the buildpack's documentation.
+    type: string
+    example: https://docs.digitalocean.com/products/app-platform/reference/buildpacks/nodejs/
+type: object
diff --git a/specification/resources/apps/models/apps_deployment_job.yml b/specification/resources/apps/models/apps_deployment_job.yml
index 6c6a821e9..9eb8979f7 100755
--- a/specification/resources/apps/models/apps_deployment_job.yml
+++ b/specification/resources/apps/models/apps_deployment_job.yml
@@ -4,7 +4,11 @@ properties:
     type: string
     example: migrate-db
   source_commit_hash:
-    title: The commit hash of the repository that was used to build this job
+    title: The commit hash of the repository that was used to build this job if a Git source was used
     type: string
     example: 54d4a727f457231062439895000d45437c7bb405
+  source_image_digest:
+    title: The digest of the container image that was used for this job if an Image source was used
+    type: string
+    example: sha256:0285555a44f1a279ea91428ebb7ec27d2110f623739838837b070611060cd992
 type: object
diff --git a/specification/resources/apps/models/apps_deployment_service.yml b/specification/resources/apps/models/apps_deployment_service.yml
index 91e30bb1a..d7a4fc72f 100755
--- a/specification/resources/apps/models/apps_deployment_service.yml
+++ b/specification/resources/apps/models/apps_deployment_service.yml
@@ -4,7 +4,17 @@ properties:
     type: string
     example: web
   source_commit_hash:
-    title: The commit hash of the repository that was used to build this service
+    title: The commit hash of the repository that was used to build this service if a Git source was used
     type: string
     example: 54d4a727f457231062439895000d45437c7bb405
+  source_image_digest:
+    title: The digest of the container image that was used for this service if an Image source was used
+    type: string
+    example: sha256:0285555a44f1a279ea91428ebb7ec27d2110f623739838837b070611060cd992
+  buildpacks:
+    type: array
+    items:
+      $ref: apps_buildpack.yml
+    description: >-
+      The list of buildpacks used to build this component. The buildpacks' full version numbers are included.
 type: object
diff --git a/specification/resources/apps/models/apps_deployment_static_site.yml b/specification/resources/apps/models/apps_deployment_static_site.yml
index 3939d28a4..ffaceb83d 100755
--- a/specification/resources/apps/models/apps_deployment_static_site.yml
+++ b/specification/resources/apps/models/apps_deployment_static_site.yml
@@ -7,4 +7,10 @@ properties:
     title: The commit hash of the repository that was used to build this static site
     type: string
     example: 54d4a727f457231062439895000d45437c7bb405
+  buildpacks:
+    type: array
+    items:
+      $ref: apps_buildpack.yml
+    description: >-
+      The list of buildpacks used to build this component. The buildpacks' full version numbers are included.
 type: object
diff --git a/specification/resources/apps/models/apps_deployment_worker.yml b/specification/resources/apps/models/apps_deployment_worker.yml
index c0917aa95..eff2bd545 100755
--- a/specification/resources/apps/models/apps_deployment_worker.yml
+++ b/specification/resources/apps/models/apps_deployment_worker.yml
@@ -4,7 +4,11 @@ properties:
     type: string
     example: queue-runner
   source_commit_hash:
-    title: The commit hash of the repository that was used to build this worker
+    title: The commit hash of the repository that was used to build this worker if a Git source was used
     type: string
     example: 54d4a727f457231062439895000d45437c7bb405
+  source_image_digest:
+    title: The digest of the container image that was used for this worker if an Image source was used
+    type: string
+    example: sha256:0285555a44f1a279ea91428ebb7ec27d2110f623739838837b070611060cd992
 type: object
diff --git a/specification/resources/apps/models/apps_list_buildpacks_response.yml b/specification/resources/apps/models/apps_list_buildpacks_response.yml
new file mode 100755
index 000000000..024a11cd5
--- /dev/null
+++ b/specification/resources/apps/models/apps_list_buildpacks_response.yml
@@ -0,0 +1,6 @@
+properties:
+  buildpacks:
+    items:
+      $ref: apps_buildpack.yml
+    type: array
+type: object
diff --git a/specification/resources/apps/models/apps_upgrade_buildpack_request.yml b/specification/resources/apps/models/apps_upgrade_buildpack_request.yml
new file mode 100644
index 000000000..194ff4cbd
--- /dev/null
+++ b/specification/resources/apps/models/apps_upgrade_buildpack_request.yml
@@ -0,0 +1,22 @@
+type: object
+properties:
+  buildpack_id:
+    type: string
+    description: The ID of the buildpack to upgrade.
+    example: digitalocean/node
+  major_version:
+    type: integer
+    format: int32
+    description: >-
+      The major version line to upgrade the buildpack to. If omitted, the latest available major version line will be
+      used.
+    example: 2
+  trigger_deployment:
+    type: boolean
+    description: >-
+      Whether to trigger a new app deployment to apply the buildpack upgrade. If `false`, the upgrade will be applied by
+      the next app deployment.
+    default: true
+    example: true
+required:
+  - buildpack_id
diff --git a/specification/resources/apps/responses/apps_upgrade_buildpack.yml b/specification/resources/apps/responses/apps_upgrade_buildpack.yml
new file mode 100644
index 000000000..311ea972f
--- /dev/null
+++ b/specification/resources/apps/responses/apps_upgrade_buildpack.yml
@@ -0,0 +1,34 @@
+description: A JSON object with the upgrade results.
+
+content:
+  application/json:
+    schema:
+      type: object
+      properties:
+        affected_components:
+          type: array
+          description: Contains a list of components affected by the buildpack upgrade.
+          items:
+            type: string
+          example:
+            - component name
+        deployment:
+          allOf:
+            - description: >-
+                The new deployment that was created for the buildpack upgrade if `trigger_deployment` was
+                specified in the request.
+            - $ref: ../models/apps_deployment.yml
+    examples:
+      Request with `trigger_deployment` set to `false`:
+        value:
+          affected_components:
+            - api
+            - frontend
+
+headers:
+  ratelimit-limit:
+    $ref: ../../../shared/headers.yml#/ratelimit-limit
+  ratelimit-remaining:
+    $ref: ../../../shared/headers.yml#/ratelimit-remaining
+  ratelimit-reset:
+    $ref: ../../../shared/headers.yml#/ratelimit-reset
diff --git a/specification/resources/apps/responses/examples.yml b/specification/resources/apps/responses/examples.yml
index e36cc6295..d2097e98c 100644
--- a/specification/resources/apps/responses/examples.yml
+++ b/specification/resources/apps/responses/examples.yml
@@ -51,21 +51,21 @@ apps:
             - name: build
               status: SUCCESS
               steps:
-              - name: initialize
-                status: SUCCESS
-                started_at: 2020-12-01T00:40:11.979305214Z
-                ended_at: 2020-12-01T00:40:12.470972033Z
-              - name: components
-                status: SUCCESS
-                steps:
-                - name: sample-php
+                - name: initialize
                   status: SUCCESS
-                  started_at: 0001-01-01T00:00:00Z
-                  ended_at: 0001-01-01T00:00:00Z
-                  component_name: sample-php
-                  message_base: Building service
-                started_at: 2020-12-01T00:40:12.470996857Z
-                ended_at: 2020-12-01T00:41:26.180360487Z
+                  started_at: 2020-12-01T00:40:11.979305214Z
+                  ended_at: 2020-12-01T00:40:12.470972033Z
+                - name: components
+                  status: SUCCESS
+                  steps:
+                    - name: sample-php
+                      status: SUCCESS
+                      started_at: 0001-01-01T00:00:00Z
+                      ended_at: 0001-01-01T00:00:00Z
+                      component_name: sample-php
+                      message_base: Building service
+                  started_at: 2020-12-01T00:40:12.470996857Z
+                  ended_at: 2020-12-01T00:41:26.180360487Z
               started_at: 2020-12-01T00:40:11.979257919Z
               ended_at: 2020-12-01T00:41:26.653989756Z
           phase: ACTIVE
@@ -78,15 +78,14 @@ apps:
           flag: germany
           continent: Europe
           data_centers:
-          - fra1
+            - fra1
         tier_slug: basic
         live_url_base: https://sample-php-iaj87.ondigitalocean.app
         live_domain: sample-php-iaj87.ondigitalocean.app
     links:
       pages: {}
     meta:
-      total:
-        1
+      total: 1
 
 app:
   value:
@@ -96,26 +95,6 @@ app:
       spec:
         name: sample-golang
         services:
-        - name: web
-          github:
-            repo: ChiefMateStarbuck/sample-golang
-            branch: main
-          run_command: bin/sample-golang
-          environment_slug: go
-          instance_size_slug: basic-xxs
-          instance_count: 1
-          http_port: 8080
-          routes:
-          - path: "/"
-        region: ams
-      default_ingress: https://sample-golang-zyhgn.ondigitalocean.app
-      created_at: '2021-02-10T16:45:14Z'
-      updated_at: '2021-02-10T17:06:56Z'
-      active_deployment:
-        id: 991dfa59-6a23-459f-86d6-67dfa2c6f1e3
-        spec:
-          name: sample-golang
-          services:
           - name: web
             github:
               repo: ChiefMateStarbuck/sample-golang
@@ -126,70 +105,90 @@ app:
             instance_count: 1
             http_port: 8080
             routes:
-            - path: "/"
+              - path: "/"
+        region: ams
+      default_ingress: https://sample-golang-zyhgn.ondigitalocean.app
+      created_at: "2021-02-10T16:45:14Z"
+      updated_at: "2021-02-10T17:06:56Z"
+      active_deployment:
+        id: 991dfa59-6a23-459f-86d6-67dfa2c6f1e3
+        spec:
+          name: sample-golang
+          services:
+            - name: web
+              github:
+                repo: ChiefMateStarbuck/sample-golang
+                branch: main
+              run_command: bin/sample-golang
+              environment_slug: go
+              instance_size_slug: basic-xxs
+              instance_count: 1
+              http_port: 8080
+              routes:
+                - path: "/"
           region: ams
         services:
-        - name: web
-          source_commit_hash: db6936cb46047c576962962eed81ad52c21f35d7
-        phase_last_updated_at: '2021-02-10T17:06:53Z'
-        created_at: '2021-02-10T17:05:30Z'
-        updated_at: '2021-02-10T17:06:53Z'
+          - name: web
+            source_commit_hash: db6936cb46047c576962962eed81ad52c21f35d7
+        phase_last_updated_at: "2021-02-10T17:06:53Z"
+        created_at: "2021-02-10T17:05:30Z"
+        updated_at: "2021-02-10T17:06:53Z"
         cause: manual
         progress:
           success_steps: 6
           total_steps: 6
           steps:
-          - name: build
-            status: SUCCESS
-            steps:
-            - name: initialize
-              status: SUCCESS
-              started_at: '2021-02-10T17:05:35.572347485Z'
-              ended_at: '2021-02-10T17:05:36.093995229Z'
-            - name: components
+            - name: build
               status: SUCCESS
               steps:
-              - name: web
-                status: SUCCESS
-                component_name: web
-                message_base: Building service
-              started_at: '2021-02-10T17:05:36.094015928Z'
-              ended_at: '2021-02-10T17:06:19.461737040Z'
-            started_at: '2021-02-10T17:05:35.572287990Z'
-            ended_at: '2021-02-10T17:06:19.807834070Z'
-          - name: deploy
-            status: SUCCESS
-            steps:
-            - name: initialize
-              status: SUCCESS
-              started_at: '2021-02-10T17:06:25.143957508Z'
-              ended_at: '2021-02-10T17:06:26.120343872Z'
-            - name: components
+                - name: initialize
+                  status: SUCCESS
+                  started_at: "2021-02-10T17:05:35.572347485Z"
+                  ended_at: "2021-02-10T17:05:36.093995229Z"
+                - name: components
+                  status: SUCCESS
+                  steps:
+                    - name: web
+                      status: SUCCESS
+                      component_name: web
+                      message_base: Building service
+                  started_at: "2021-02-10T17:05:36.094015928Z"
+                  ended_at: "2021-02-10T17:06:19.461737040Z"
+              started_at: "2021-02-10T17:05:35.572287990Z"
+              ended_at: "2021-02-10T17:06:19.807834070Z"
+            - name: deploy
               status: SUCCESS
               steps:
-              - name: web
-                status: SUCCESS
-                steps:
-                - name: deploy
+                - name: initialize
                   status: SUCCESS
-                  component_name: web
-                  message_base: Deploying service
-                - name: wait
+                  started_at: "2021-02-10T17:06:25.143957508Z"
+                  ended_at: "2021-02-10T17:06:26.120343872Z"
+                - name: components
                   status: SUCCESS
-                  component_name: web
-                  message_base: Waiting for service
-                component_name: web
-              started_at: '2021-02-10T17:06:26.120385561Z'
-              ended_at: '2021-02-10T17:06:50.029695913Z'
-            - name: finalize
-              status: SUCCESS
-              started_at: '2021-02-10T17:06:50.348459495Z'
-              ended_at: '2021-02-10T17:06:53.404065961Z'
-            started_at: '2021-02-10T17:06:25.143932418Z'
-            ended_at: '2021-02-10T17:06:53.404104185Z'
+                  steps:
+                    - name: web
+                      status: SUCCESS
+                      steps:
+                        - name: deploy
+                          status: SUCCESS
+                          component_name: web
+                          message_base: Deploying service
+                        - name: wait
+                          status: SUCCESS
+                          component_name: web
+                          message_base: Waiting for service
+                      component_name: web
+                  started_at: "2021-02-10T17:06:26.120385561Z"
+                  ended_at: "2021-02-10T17:06:50.029695913Z"
+                - name: finalize
+                  status: SUCCESS
+                  started_at: "2021-02-10T17:06:50.348459495Z"
+                  ended_at: "2021-02-10T17:06:53.404065961Z"
+              started_at: "2021-02-10T17:06:25.143932418Z"
+              ended_at: "2021-02-10T17:06:53.404104185Z"
         phase: ACTIVE
         tier_slug: basic
-      last_deployment_created_at: '2021-02-10T17:05:30Z'
+      last_deployment_created_at: "2021-02-10T17:05:30Z"
       live_url: https://sample-golang-zyhgn.ondigitalocean.app
       region:
         slug: ams
@@ -197,11 +196,24 @@ app:
         flag: netherlands
         continent: Europe
         data_centers:
-        - ams3
+          - ams3
       tier_slug: basic
       live_url_base: https://sample-golang-zyhgn.ondigitalocean.app
       live_domain: sample-golang-zyhgn.ondigitalocean.app
       project_id: 88b72d1a-b78a-4d9f-9090-b53c4399073f
+      build_config:
+        cnb_versioning:
+          buildpacks:
+            - id: digitalocean/python
+              major_version: 1
+              latest: true
+              name: Python
+              docs_link: https://docs.digitalocean.com/products/app-platform/reference/buildpacks/python/
+            - id: digitalocean/node
+              major_version: 0
+              latest: false
+              name: Node.js (v0, deprecated)
+              docs_link: https://docs.digitalocean.com/products/app-platform/reference/buildpacks/nodejs/
 
 deployments:
   value:
@@ -224,6 +236,12 @@ deployments:
         services:
           - name: web
             source_commit_hash: 9a4df0b8e161e323bc3cdf1dc71878080fe144fa
+            buildpacks:
+              - id: digitalocean/go
+                major_version: 1
+                latest: true
+                name: Golang
+                docs_link: https://docs.digitalocean.com/products/app-platform/reference/buildpacks/go/
         phase_last_updated_at: 0001-01-01T00:00:00Z
         created_at: 2020-07-28T18:00:00Z
         updated_at: 2020-07-28T18:00:00Z
@@ -232,47 +250,46 @@ deployments:
           pending_steps: 6
           total_steps: 6
           steps:
-          - name: build
-            status: PENDING
-            steps:
-            - name: initialize
-              status: PENDING
-            - name: components
+            - name: build
               status: PENDING
               steps:
-              - name: web
-                status: PENDING
-                component_name: web
-                message_base: Building service
-          - name: deploy
-            status: PENDING
-            steps:
-            - name: initialize
-              status: PENDING
-            - name: components
+                - name: initialize
+                  status: PENDING
+                - name: components
+                  status: PENDING
+                  steps:
+                    - name: web
+                      status: PENDING
+                      component_name: web
+                      message_base: Building service
+            - name: deploy
               status: PENDING
               steps:
-              - name: web
-                status: PENDING
-                steps:
-                - name: deploy
+                - name: initialize
                   status: PENDING
-                  component_name: web
-                  message_base: Deploying service
-                - name: wait
+                - name: components
+                  status: PENDING
+                  steps:
+                    - name: web
+                      status: PENDING
+                      steps:
+                        - name: deploy
+                          status: PENDING
+                          component_name: web
+                          message_base: Deploying service
+                        - name: wait
+                          status: PENDING
+                          component_name: web
+                          message_base: Waiting for service
+                      component_name: web
+                - name: finalize
                   status: PENDING
-                  component_name: web
-                  message_base: Waiting for service
-                component_name: web
-            - name: finalize
-              status: PENDING
         phase: PENDING_BUILD
         tier_slug: basic
     links:
       pages: {}
     meta:
-      total:
-        1
+      total: 1
 
 deployment:
   value:
@@ -295,6 +312,12 @@ deployment:
       services:
         - name: web
           source_commit_hash: 9a4df0b8e161e323bc3cdf1dc71878080fe144fa
+          buildpacks:
+            - id: digitalocean/go
+              major_version: 1
+              latest: true
+              name: Golang
+              docs_link: https://docs.digitalocean.com/products/app-platform/reference/buildpacks/go/
       phase_last_updated_at: 0001-01-01T00:00:00Z
       created_at: 2020-07-28T18:00:00Z
       updated_at: 2020-07-28T18:00:00Z
@@ -303,67 +326,66 @@ deployment:
         pending_steps: 6
         total_steps: 6
         steps:
-        - name: build
-          status: PENDING
-          steps:
-          - name: initialize
-            status: PENDING
-          - name: components
+          - name: build
             status: PENDING
             steps:
-            - name: web
-              status: PENDING
-              component_name: web
-              message_base: Building service
-        - name: deploy
-          status: PENDING
-          steps:
-          - name: initialize
-            status: PENDING
-          - name: components
+              - name: initialize
+                status: PENDING
+              - name: components
+                status: PENDING
+                steps:
+                  - name: web
+                    status: PENDING
+                    component_name: web
+                    message_base: Building service
+          - name: deploy
             status: PENDING
             steps:
-            - name: web
-              status: PENDING
-              steps:
-              - name: deploy
+              - name: initialize
                 status: PENDING
-                component_name: web
-                message_base: Deploying service
-              - name: wait
+              - name: components
+                status: PENDING
+                steps:
+                  - name: web
+                    status: PENDING
+                    steps:
+                      - name: deploy
+                        status: PENDING
+                        component_name: web
+                        message_base: Deploying service
+                      - name: wait
+                        status: PENDING
+                        component_name: web
+                        message_base: Waiting for service
+                    component_name: web
+              - name: finalize
                 status: PENDING
-                component_name: web
-                message_base: Waiting for service
-              component_name: web
-          - name: finalize
-            status: PENDING
       phase: PENDING_BUILD
       tier_slug: basic
 
-
 tiers:
   value:
     tiers:
-    - name: Starter
-      slug: starter
-      egress_bandwidth_bytes: '1073741824'
-      build_seconds: '6000'
-    - name: Basic
-      slug: basic
-      egress_bandwidth_bytes: '42949672960'
-      build_seconds: '24000'
-    - name: Professional
-      slug: professional
-      egress_bandwidth_bytes: '107374182400'
-      build_seconds: '60000'
+      - name: Starter
+        slug: starter
+        egress_bandwidth_bytes: "1073741824"
+        build_seconds: "6000"
+      - name: Basic
+        slug: basic
+        egress_bandwidth_bytes: "42949672960"
+        build_seconds: "24000"
+      - name: Professional
+        slug: professional
+        egress_bandwidth_bytes: "107374182400"
+        build_seconds: "60000"
 
 tier:
   value:
     tier:
       name: Basic
       slug: basic
-      egress_bandwidth_bytes: '42949672960'
-      build_seconds: '24000'
+      egress_bandwidth_bytes: "42949672960"
+      build_seconds: "24000"
 
 logs:
   value:
@@ -375,150 +397,150 @@ logs:
 regions:
   value:
     regions:
-    - slug: ams
-      label: Amsterdam
-      flag: netherlands
-      continent: Europe
-      data_centers:
-      - ams3
-    - slug: nyc
-      label: New York
-      flag: usa
-      continent: North America
-      data_centers:
-      - nyc1
-      - nyc3
-      default: true
-    - slug: fra
-      label: Frankfurt
-      flag: germany
-      continent: Europe
-      data_centers:
-      - fra1
-    - slug: sfo
-      label: San Francisco
-      flag: usa
-      continent: North America
-      data_centers:
-      - sfo3
-    - slug: sgp
-      label: Singapore
-      flag: singapore
-      continent: Asia
-      data_centers:
-      - sgp1
-    - slug: blr
-      label: Bangalore
-      flag: india
-      continent: Asia
-      data_centers:
-      - blr1
-    - slug: tor
-      label: Toronto
-      flag: canada
-      continent: North America
-      data_centers:
-      - tor1
-    - slug: lon
-      label: London
-      flag: uk
-      continent: Europe
-      data_centers:
-      - lon1
+      - slug: ams
+        label: Amsterdam
+        flag: netherlands
+        continent: Europe
+        data_centers:
+          - ams3
+      - slug: nyc
+        label: New York
+        flag: usa
+        continent: North America
+        data_centers:
+          - nyc1
+          - nyc3
+        default: true
+      - slug: fra
+        label: Frankfurt
+        flag: germany
+        continent: Europe
+        data_centers:
+          - fra1
+      - slug: sfo
+        label: San Francisco
+        flag: usa
+        continent: North America
+        data_centers:
+          - sfo3
+      - slug: sgp
+        label: Singapore
+        flag: singapore
+        continent: Asia
+        data_centers:
+          - sgp1
+      - slug: blr
+        label: Bangalore
+        flag: india
+        continent: Asia
+        data_centers:
+          - blr1
+      - slug: tor
+        label: Toronto
+        flag: canada
+        continent: North America
+        data_centers:
+          - tor1
+      - slug: lon
+        label: London
+        flag: uk
+        continent: Europe
+        data_centers:
+          - lon1
 
 instance_sizes:
   value:
     instance_sizes:
-    - name: Basic XXS
-      slug: basic-xxs
-      cpu_type: SHARED
-      cpus: '1'
-      memory_bytes: '536870912'
-      usd_per_month: '5.00'
-      usd_per_second: '0.000002066799'
-      tier_slug: basic
-      tier_upgrade_to: professional-xs
-    - name: Basic XS
-      slug: basic-xs
-      cpu_type: SHARED
-      cpus: '1'
-      memory_bytes: '1073741824'
-      usd_per_month: '10.00'
-      usd_per_second: '0.000004133598'
-      tier_slug: basic
-      tier_upgrade_to: professional-xs
-    - name: Basic S
-      slug: basic-s
-      cpu_type: SHARED
-      cpus: '1'
-      memory_bytes: '2147483648'
-      usd_per_month: '20.00'
-      usd_per_second: '0.000008267196'
-      tier_slug: basic
-      tier_upgrade_to: professional-s
-    - name: Basic M
-      slug: basic-m
-      cpu_type: SHARED
-      cpus: '2'
-      memory_bytes: '4294967296'
-      usd_per_month: '40.00'
-      usd_per_second: '0.000016534392'
-      tier_slug: basic
-      tier_upgrade_to: professional-m
-    - name: Professional XS
-      slug: professional-xs
-      cpu_type: SHARED
-      cpus: '1'
-      memory_bytes: '1073741824'
-      usd_per_month: '12.00'
-      usd_per_second: '0.000004960317'
-      tier_slug: professional
-      tier_downgrade_to: basic-xs
-    - name: Professional S
-      slug: professional-s
-      cpu_type: SHARED
-      cpus: '1'
-      memory_bytes: '2147483648'
-      usd_per_month: '25.00'
-      usd_per_second: '0.000010333995'
-      tier_slug: professional
-      tier_downgrade_to: basic-s
-    - name: Professional M
-      slug: professional-m
-      cpu_type: SHARED
-      cpus: '2'
-      memory_bytes: '4294967296'
-      usd_per_month: '50.00'
-      usd_per_second: '0.000020667989'
-      tier_slug: professional
-      tier_downgrade_to: basic-s
-    - name: Professional 1L
-      slug: professional-1l
-      cpu_type: DEDICATED
-      cpus: '1'
-      memory_bytes: '4294967296'
-      usd_per_month: '75.00'
-      usd_per_second: '0.000031001984'
-      tier_slug: professional
-      tier_downgrade_to: basic-m
-    - name: Professional L
-      slug: professional-l
-      cpu_type: DEDICATED
-      cpus: '2'
-      memory_bytes: '8589934592'
-      usd_per_month: '150.00'
-      usd_per_second: '0.000062003968'
-      tier_slug: professional
-      tier_downgrade_to: basic-s
-    - name: Professional XL
-      slug: professional-xl
-      cpu_type: DEDICATED
-      cpus: '4'
-      memory_bytes: '17179869184'
-      usd_per_month: '300.00'
-      usd_per_second: '0.000124007937'
-      tier_slug: professional
-      tier_downgrade_to: basic-s
+      - name: Basic XXS
+        slug: basic-xxs
+        cpu_type: SHARED
+        cpus: "1"
+        memory_bytes: "536870912"
+        usd_per_month: "5.00"
+        usd_per_second: "0.000002066799"
+        tier_slug: basic
+        tier_upgrade_to: professional-xs
+      - name: Basic XS
+        slug: basic-xs
+        cpu_type: SHARED
+        cpus: "1"
+        memory_bytes: "1073741824"
+        usd_per_month: "10.00"
+        usd_per_second: "0.000004133598"
+        tier_slug: basic
+        tier_upgrade_to: professional-xs
+      - name: Basic S
+        slug: basic-s
+        cpu_type: SHARED
+        cpus: "1"
+        memory_bytes: "2147483648"
+        usd_per_month: "20.00"
+        usd_per_second: "0.000008267196"
+        tier_slug: basic
+        tier_upgrade_to: professional-s
+      - name: Basic M
+        slug: basic-m
+        cpu_type: SHARED
+        cpus: "2"
+        memory_bytes: "4294967296"
+        usd_per_month: "40.00"
+        usd_per_second: "0.000016534392"
+        tier_slug: basic
+        tier_upgrade_to: professional-m
+      - name: Professional XS
+        slug: professional-xs
+        cpu_type: SHARED
+        cpus: "1"
+        memory_bytes: "1073741824"
+        usd_per_month: "12.00"
+        usd_per_second: "0.000004960317"
+        tier_slug: professional
+        tier_downgrade_to: basic-xs
+      - name: Professional S
+        slug: professional-s
+        cpu_type: SHARED
+        cpus: "1"
+        memory_bytes: "2147483648"
+        usd_per_month: "25.00"
+        usd_per_second: "0.000010333995"
+        tier_slug: professional
+        tier_downgrade_to: basic-s
+      - name: Professional M
+        slug: professional-m
+        cpu_type: SHARED
+        cpus: "2"
+        memory_bytes: "4294967296"
+        usd_per_month: "50.00"
+        usd_per_second: "0.000020667989"
+        tier_slug: professional
+        tier_downgrade_to: basic-s
+      - name: Professional 1L
+        slug: professional-1l
+        cpu_type: DEDICATED
+        cpus: "1"
+        memory_bytes: "4294967296"
+        usd_per_month: "75.00"
+        usd_per_second: "0.000031001984"
+        tier_slug: professional
+        tier_downgrade_to: basic-m
+      - name: Professional L
+        slug: professional-l
+        cpu_type: DEDICATED
+        cpus: "2"
+        memory_bytes: "8589934592"
+        usd_per_month: "150.00"
+        usd_per_second: "0.000062003968"
+        tier_slug: professional
+        tier_downgrade_to: basic-s
+      - name: Professional XL
+        slug: professional-xl
+        cpu_type: DEDICATED
+        cpus: "4"
+        memory_bytes: "17179869184"
+        usd_per_month: "300.00"
+        usd_per_second: "0.000124007937"
+        tier_slug: professional
+        tier_downgrade_to: basic-s
 
 instance_size:
   value:
@@ -526,10 +548,10 @@ instance_size:
       name: Basic XXS
       slug: basic-xxs
       cpu_type: SHARED
-      cpus: '1'
-      memory_bytes: '536870912'
-      usd_per_month: '5.00'
-      usd_per_second: '0.000002066799'
+      cpus: "1"
+      memory_bytes: "536870912"
+      usd_per_month: "5.00"
+      usd_per_second: "0.000002066799"
       tier_slug: basic
       tier_upgrade_to: professional-xs
 
@@ -552,22 +574,22 @@ components:
 propose:
   value:
     app_name_available: true
-    existing_static_apps: '2'
-    max_free_static_apps: '3'
+    existing_static_apps: "2"
+    max_free_static_apps: "3"
     spec:
       name: sample-golang
       services:
-      - name: web
-        github:
-          repo: digitalocean/sample-golang
-          branch: branch
-        run_command: bin/sample-golang
-        environment_slug: go
-        instance_size_slug: basic-xxs
-        instance_count: 1
-        http_port: 8080
-        routes:
-        - path: "/"
+        - name: web
+          github:
+            repo: digitalocean/sample-golang
+            branch: branch
+          run_command: bin/sample-golang
+          environment_slug: go
+          instance_size_slug: basic-xxs
+          instance_count: 1
+          http_port: 8080
+          routes:
+            - path: "/"
       region: ams
     app_cost: 5
     app_tier_upgrade_cost: 17
@@ -575,33 +597,33 @@ propose:
 alerts:
   value:
     alerts:
-    - id: e552e1f9-c1b0-4e6d-8777-ad6f27767306
-      spec:
-        rule: DEPLOYMENT_FAILED
-      emails:
-      - sammy@digitalocean.com
-      phase: ACTIVE
-      progress:
-        steps:
-        - name: alert-configure-insight-alert
-          status: SUCCESS
-          started_at: 2020-07-28T18:00:00Z
-          ended_at: 2020-07-28T18:00:00Z
-    - id: b58cc9d4-0702-4ffd-ab45-4c2a8d979527
-      spec:
-        rule: CPU_UTILIZATION
-        operator: GREATER_THAN
-        value: 85.0
-        window: FIVE_MINUTES
-      emails:
-      - sammy@digitalocean.com
-      phase: ACTIVE
-      progress:
-        steps:
-        - name: alert-configure-insight-alert
-          status: SUCCESS
-          started_at: 2020-07-28T18:00:00Z
-          ended_at: 2020-07-28T18:00:00Z
+      - id: e552e1f9-c1b0-4e6d-8777-ad6f27767306
+        spec:
+          rule: DEPLOYMENT_FAILED
+        emails:
+          - sammy@digitalocean.com
+        phase: ACTIVE
+        progress:
+          steps:
+            - name: alert-configure-insight-alert
+              status: SUCCESS
+              started_at: 2020-07-28T18:00:00Z
+              ended_at: 2020-07-28T18:00:00Z
+      - id: b58cc9d4-0702-4ffd-ab45-4c2a8d979527
+        spec:
+          rule: CPU_UTILIZATION
+          operator: GREATER_THAN
+          value: 85.0
+          window: FIVE_MINUTES
+        emails:
+          - sammy@digitalocean.com
+        phase: ACTIVE
+        progress:
+          steps:
+            - name: alert-configure-insight-alert
+              status: SUCCESS
+              started_at: 2020-07-28T18:00:00Z
+              ended_at: 2020-07-28T18:00:00Z
 
 alert:
   value:
@@ -610,11 +632,33 @@ alert:
       spec:
         rule: DEPLOYMENT_FAILED
       emails:
-      - sammy@digitalocean.com
+        - sammy@digitalocean.com
       phase: ACTIVE
       progress:
         steps:
-        - name: alert-configure-insight-alert
-          status: SUCCESS
-          started_at: 2020-07-28T18:00:00Z
-          ended_at: 2020-07-28T18:00:00Z
\ No newline at end of file
+          - name: alert-configure-insight-alert
+            status: SUCCESS
+            started_at: 2020-07-28T18:00:00Z
+            ended_at: 2020-07-28T18:00:00Z
+
+buildpacks:
+  value:
+    buildpacks:
+      - id: digitalocean/node
+        version: "1.2.0"
+        major_version: 1
+        latest: true
+        name: Node.js
+        description:
+          - Install Node.js, NPM, and Yarn.
+          - Install dependencies using `npm ci` or `yarn install`.
+        docs_link: https://docs.digitalocean.com/products/app-platform/reference/buildpacks/nodejs/
+      - id: digitalocean/node
+        version: "0.0.5"
+        major_version: 0
+        latest: false
+        name: Node.js (v0, deprecated)
+        description:
+          - An example of a second buildpack with the same ID but a different major version line.
+          - Install Node.js, NPM, and Yarn.
+        docs_link: https://docs.digitalocean.com/products/app-platform/reference/buildpacks/nodejs/
diff --git a/specification/resources/apps/responses/list_buildpacks.yml b/specification/resources/apps/responses/list_buildpacks.yml
new file mode 100644
index 000000000..fdf83d8e1
--- /dev/null
+++ b/specification/resources/apps/responses/list_buildpacks.yml
@@ -0,0 +1,17 @@
+description: A JSON object with a list of buildpacks.
+
+content:
+  application/json:
+    schema:
+      $ref: ../models/apps_list_buildpacks_response.yml
+    examples:
+      buildpacks:
+        $ref: examples.yml#/buildpacks
+
+headers:
+  ratelimit-limit:
+    $ref: ../../../shared/headers.yml#/ratelimit-limit
+  ratelimit-remaining:
+    $ref: ../../../shared/headers.yml#/ratelimit-remaining
+  ratelimit-reset:
+    $ref: ../../../shared/headers.yml#/ratelimit-reset