diff --git a/.github/workflows/update-v3-spec.yml b/.github/workflows/update-v3-spec.yml
new file mode 100644
index 00000000..a44d3185
--- /dev/null
+++ b/.github/workflows/update-v3-spec.yml
@@ -0,0 +1,54 @@
+name: Update Acquia v3 API spec
+
+on:
+  schedule:
+    - cron: '0 3 * * *'
+  workflow_dispatch:
+
+jobs:
+  update-spec:
+    runs-on: ubuntu-24.04
+    permissions:
+      contents: write
+      pull-requests: write
+    steps:
+      - uses: actions/checkout@v7
+
+      - uses: shivammathur/setup-php@v2
+        with:
+          coverage: none
+
+      - name: Install dependencies
+        run: composer install --no-interaction --prefer-dist --optimize-autoloader
+
+      - name: Download latest v3 spec
+        run: composer update-acquia-v3-spec
+
+      - name: Check for changes
+        id: diff
+        run: |
+          if git diff --quiet assets/acquia-v3-spec.yaml; then
+            echo "changed=false" >> $GITHUB_OUTPUT
+          else
+            echo "changed=true" >> $GITHUB_OUTPUT
+          fi
+
+      - name: Create PR if spec changed
+        if: steps.diff.outputs.changed == 'true'
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          BRANCH="automated/update-acquia-v3-spec-${{ github.run_id }}"
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+          git checkout -b "$BRANCH"
+          git add assets/acquia-v3-spec.yaml
+          git commit -m "chore: update Acquia v3 OpenAPI spec"
+          git push origin "$BRANCH"
+          gh pr create \
+            --title "chore: update Acquia v3 OpenAPI spec" \
+            --body "Automated spec update from https://api-specs-dev.dev.cicd.acquia.io/openapi.yaml" \
+            --label "chore" \
+            --base main \
+            --head "$BRANCH"
+          gh pr merge "$BRANCH" --auto --squash
diff --git a/composer.json b/composer.json
index 3f651125..3ac53033 100644
--- a/composer.json
+++ b/composer.json
@@ -120,13 +120,7 @@
             "git -C var/cx-api-spec rev-parse HEAD > assets/acquia-spec.version"
         ],
         "update-acquia-v3-spec": [
-            "rm -rf var/api-specs",
-            "git clone --depth 1 git@github.com:acquia/api-specs.git var/api-specs",
-            "npm install --prefix var/api-specs @redocly/cli@latest --no-save --ignore-scripts",
-            "cd var/api-specs && PATH=$(pwd)/node_modules/.bin:$PATH make bundle",
-            "cd var/api-specs && npx --yes @redocly/cli@latest bundle --config redocly.bundle.yaml dist/openapi.yaml --dereferenced --ext json -o ../../assets/acquia-v3-spec.json",
-            "git -C var/api-specs rev-parse HEAD > assets/acquia-v3-spec.version",
-            "rm -rf var/api-specs"
+            "curl -sfL https://api-specs-dev.dev.cicd.acquia.io/openapi.yaml -o assets/acquia-v3-spec.yaml"
         ],
         "update-acsf-api-spec": [
             "rm -rf gardener",