diff --git a/.github/workflows/openapi.yml b/.github/workflows/openapi.yml
new file mode 100644
index 00000000..bc51da2d
--- /dev/null
+++ b/.github/workflows/openapi.yml
@@ -0,0 +1,109 @@
+name: OpenAPI
+
+# Generate the OpenAPI documentation
+
+# Automatically creates the gh-pages branch but it needs to be manually enabled in the repository settings.
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - 'includes/wp-includes/class-rest.php'
+
+jobs:
+
+  openapi:
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: write
+
+    strategy:
+      matrix:
+        php: [ '8.0' ]
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: install more-utils for sponge
+        run: sudo apt-get install moreutils
+
+      - name: Check does gh-pages branch need to be created
+        run: |
+          git checkout origin/gh-pages || true;
+          if [[ $(git branch -l gh-pages) == "" ]]; then
+            gh_pages_branch_needed=true;
+          else
+            gh_pages_branch_needed=false;
+          fi
+          echo "GH_PAGES_BRANCH_NEEDED=$gh_pages_branch_needed" >> $GITHUB_ENV;
+          mkdir gh-pages ||  true;
+
+      - name:  Create gh-pages branch because previous step indicates it does not exist
+        if: ${{ env.GH_PAGES_BRANCH_NEEDED == true }}
+        uses: peaceiris/actions-gh-pages@v4
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          publish_dir: ./gh-pages
+          force_orphan: true
+          allow_empty_commit: true
+          commit_message: "🤖 Creating gh-pages branch"
+
+      - name: Checkout GitHub Pages branch for code coverage report
+        uses: actions/checkout@v3
+        with:
+          ref: gh-pages
+          path: gh-pages
+
+      - name: Install PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: ${{ matrix.php }}
+          coverage: xdebug
+          tools: composer
+          extensions: zip
+
+      - name: Read .env.testing
+        uses: c-py/action-dotenv-to-setenv@v2
+        with:
+          env-file: .env.testing
+
+      - name: Run composer install
+        continue-on-error: true
+        run: composer install
+
+      - name: Run npm install
+        continue-on-error: true
+        run: npm install
+
+      - name: Allow writing to wp-content
+        run: sudo chmod -R a+w wp-content
+
+      - name: Clear previous openapi file
+        run: rm gh-pages/openapi/example-plugin-openapi.json || true;
+
+      - name: Start wp-env
+        run: |
+          mkdir openapi || true;
+          npx wp-env start --debug;
+          sudo chmod -R a+w wordpress/wp-content;
+          mkdir wordpress/wp-content/uploads || true;
+          sudo chmod -R a+w wordpress/wp-content/uploads;
+
+      - name: Generate OpenAPI documentation
+        run: |
+          composer generate-openapi;
+          mkdir gh-pages/openapi || true;
+          cp openapi/example-plugin-openapi.json gh-pages/openapi/example-plugin-openapi.json;
+
+      - name: Commit openapi to gh-pages
+        uses: stefanzweifel/git-auto-commit-action@v5
+        with:
+          repository: gh-pages
+          branch: gh-pages
+          commit_message: "🤖 Save OpenAPI document to gh-pages"
+          commit_options: ""
+        env:
+          GITHUB_TOKEN: "${{ github.token }}"
\ No newline at end of file
diff --git a/composer.json b/composer.json
index c5ed4c4f..5139dec9 100644
--- a/composer.json
+++ b/composer.json
@@ -85,6 +85,7 @@
     "wp-cli/i18n-command": "^2.4",
     "wp-cli/wp-cli-bundle": "*",
     "wp-coding-standards/wpcs": "^3.0",
+    "wpackagist-plugin/document-generator-for-openapi": "*",
     "wpackagist-plugin/log-http-requests": "*",
     "wpackagist-plugin/query-monitor": "*",
     "wpackagist-plugin/user-role-editor": "*",
@@ -93,7 +94,8 @@
     "wpackagist-plugin/wp-mail-debugger": "^1.1",
     "wpackagist-plugin/wp-rest-api-log": "*",
     "wpackagist-theme/storefront": "*",
-    "wpackagist-theme/twentytwenty": "*"
+    "wpackagist-theme/twentytwenty": "*",
+    "wpackagist-theme/twentytwentyfour": "*"
   },
   "extra": {
     "patches": {
@@ -169,6 +171,10 @@
       "wp i18n make-pot src languages/$(basename \"$PWD\").pot --domain=$(basename \"$PWD\")",
       "wp dist-archive . ./dist-archive --plugin-dirname=$(basename \"$PWD\") --create-target-dir"
     ],
+    "generate-openapi": [
+      "npx wp-env run cli /var/www/html/wp-content/plugins/example-plugin/vendor/bin/wp openapi-generator export-file example-plugin/v1 --destination=./openapi/example-plugin-openapi.json --extract-common-types;",
+      "cat ./openapi/example-plugin-openapi.json | jq 'del(.servers) | del(.paths.\"/\") | .jsonSchemaDialect = \"https://spec.openapis.org/oas/3.1/dialect/base\"' | sponge ./openapi/example-plugin-openapi.json"
+    ],
     "github-actions": [
       "act -P ubuntu-latest=shivammathur/node:latest"
     ],