Acquia Source

Acquia Source ("Source powered by Drupal CMS") is a managed SaaS CMS wrapping Drupal CMS 11+ and the Drupal Canvas page builder (drupal.org/project/canvas, formerly Experience Builder). You don't get server/SSH access or arbitrary contrib — you interact through its JSON:API, its MCP server, the Canvas Page API, and the @drupal-canvas CLI. Admin/login at https://source.acquia.com.

Acquia Source is a SaaS product, not Acquia Cloud Platform. The acli CLI manages Cloud Platform, not Source sites — don't reach for it here. Source is driven through the web admin + the APIs below.

Site identity & credentials

• CMS URL looks like https://<uuid>.cms.acquia.site (auto-generated at site creation; a custom domain can be mapped later). This base URL is the JSON:API host and the OAuth host.
• API clients (OAuth2 client_id/secret) are created in the admin UI under API → API clients → Add API client.
• The @drupal-canvas CLI reads everything from a local .env (never committed):

  CANVAS_SITE_URL=https://<uuid>.cms.acquia.site
  CANVAS_CLIENT_ID=<client_id>
  CANVAS_CLIENT_SECRET=<client_secret>
  CANVAS_JSONAPI_PREFIX=api        # Source serves JSON:API under /api, not the Drupal default /jsonapi
  # CANVAS_ACCESS_TOKEN=<token>    # optional: a pre-issued Bearer token instead of client credentials