diff --git a/.github/workflows/pr_closed.yaml b/.github/workflows/pr_closed.yaml
index 003cf976..74b1a304 100644
--- a/.github/workflows/pr_closed.yaml
+++ b/.github/workflows/pr_closed.yaml
@@ -157,3 +157,40 @@ jobs:
         run: npm publish --workspace internal/events
         env:
           NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+
+  publish-api-specs:
+    name: Generate and publish API specs to APIM pre-release artefacts
+    #if: needs.check-merge-or-workflow-dispatch.outputs.deploy == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    strategy:
+      max-parallel: 1
+      matrix:
+        apim-env: [internal-dev, int, ref, prod]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5.0.0
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 22
+
+      - name: Install dependencies
+        working-directory: .
+        run: npm ci
+        shell: bash
+
+      - name: Generate OpenAPI specification
+        run: |
+          echo "Building env specific OAS spec"
+          make build-json-oas-spec APIM_ENV=${{ matrix.apim-env }}
+
+      - name: Upload API spec artefact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.apim-env }}-build-output
+          path: ./build