Characterquilt Authentication

generated: '2026-08-13'
method: probed
source: >-
  live probes of https://mcp.characterquilt.com/api/mcp (401 + WWW-Authenticate),
  https://mcp.characterquilt.com/.well-known/oauth-protected-resource (200), and
  https://www.characterquilt.com/branding/{slug}.json (200, anonymous)
note: >-
  CharacterQuilt runs two surfaces with two completely different authentication
  postures. The public brand-profiles data surface is unauthenticated and
  CORS-open. The hosted MCP server is OAuth-protected and returns a spec-correct
  RFC 9728 challenge. Neither surface has a published authentication guide; every
  fact below was observed on the wire on 2026-08-13.
surfaces:
- name: Brand Profiles (public data surface)
  base_url: https://www.characterquilt.com
  auth: none
  schemes: []
  evidence:
    url: https://www.characterquilt.com/branding/stripe.json
    http_status: 200
    note: >-
      Returned 26 KB of JSON with no credential presented.
      access-control-allow-origin: * — readable from any browser origin.
      strict-transport-security: max-age=63072000.
- name: CharacterQuilt MCP Server
  base_url: https://mcp.characterquilt.com
  endpoint: https://mcp.characterquilt.com/api/mcp
  auth: oauth2
  schemes:
  - type: oauth2
    name: mcpOAuth
    profile: OAuth 2.1 bearer, as required by the MCP authorization spec
    bearer_methods_supported:
    - header
    discovery:
      protected_resource_metadata: https://mcp.characterquilt.com/.well-known/oauth-protected-resource
      standard: RFC 9728
      status: 200
    challenge: >-
      WWW-Authenticate: Bearer
      resource_metadata="https://mcp.characterquilt.com/.well-known/oauth-protected-resource"
    scopes:
    - read:design_brain
    - write:generated_artifacts
    - publish:public_file
    - read:agent_work
    - write:agent_work
    scopes_artifact: scopes/characterquilt-scopes.yml
  evidence:
    url: https://mcp.characterquilt.com/api/mcp
    http_status: 401
    body: '{"error":"unauthorized"}'
    note: >-
      Anonymous POST of jsonrpc tools/list and initialize both return 401 with the
      RFC 9728 resource_metadata challenge header. GET returns the same. The server
      is real and reachable; its tool schemas require an authenticated
      introspection.
findings:
- id: rfc9728-implemented-correctly
  good: true
  detail: >-
    The 401 carries a WWW-Authenticate: Bearer header with a resource_metadata
    parameter, and that URL serves valid JSON metadata. This is the correct MCP
    authorization handshake and most MCP servers in the catalog do not do it.
- id: authorization-server-metadata-unreachable
  good: false
  detail: >-
    The advertised authorization server is https://characterquilt-review-beta.vercel.app,
    a Vercel PREVIEW deployment rather than a production identity host, and it does
    not serve RFC 8414 metadata — /.well-known/oauth-authorization-server and
    /.well-known/openid-configuration both return HTTP 200 with the Next.js HTML
    application shell. A conforming MCP client that follows the discovery chain
    cannot obtain an authorization or token endpoint, so the documented flow cannot
    be completed by a third party.
  evidence:
  - url: https://characterquilt-review-beta.vercel.app/.well-known/oauth-authorization-server
    http_status: 200
    content_type: text/html
  - url: https://characterquilt-review-beta.vercel.app/.well-known/openid-configuration
    http_status: 200
    content_type: text/html
- id: no-published-auth-guide
  good: false
  detail: >-
    CharacterQuilt publishes no developer portal, API reference or authentication
    page. /developers, /docs, /docs/api and /api-docs all return 404 on
    www.characterquilt.com. Everything above had to be probed.