generated: '2026-09-19'
method: searched
description: Well-known discovery documents found across Sponge hosts. The Wallet API host exposes full
  OAuth 2.0 / OIDC authorization-server metadata (backing the MCP OAuth flow); the Gateway API host exposes
  its own OAuth server metadata; the docs host publishes an RFC 9727 api-catalog linkset pointing at the
  OpenAPI spec.
hosts:
- host: ''
  documents:
  - path: /.well-known/openid-configuration
    status: 200
    file: sponge-openid-configuration.json
  - path: /.well-known/oauth-authorization-server
    status: 200
    file: sponge-oauth-authorization-server.json
  - path: /.well-known/oauth-authorization-server
    status: 200
    file: sponge-gateway-oauth-authorization-server.json
  - path: /.well-known/api-catalog
    status: 200
    file: sponge-api-catalog.json
  - path: /.well-known/security.txt
    status: 404
  - path: /.well-known/security.txt
    status: 404
  - path: /.well-known/ai-plugin.json
    status: 404
- host: https://api.wallet.paysponge.com
  documents:
  - path: /.well-known/oauth-protected-resource
    status: 200
    file: sponge-api-oauth-protected-resource.json
    bytes: 251
  - path: /.well-known/oauth-authorization-server
    status: 200
    file: sponge-api-oauth-authorization-server.json
    bytes: 752
  path_echo_control: passed
x-shape-fix:
  converted: '2026-08-20'
  from: documents
  note: Rewritten into hosts[] -> documents[], the only shape well_known_docs() in score.rb reads. A served
    .well-known surface recorded in any other shape scores as absent.
x-mcp-probe:
  probed: '2026-09-19'
  issue: roadmap#321, roadmap#337
  documents:
  - host: https://api.wallet.paysponge.com
    path: /.well-known/oauth-protected-resource
    file: sponge-api-oauth-protected-resource.json
  - host: https://api.wallet.paysponge.com
    path: /.well-known/oauth-authorization-server
    file: sponge-api-oauth-authorization-server.json
  validated_on: resource (RFC 9728) / issuer (RFC 8414, OIDC)
  negative_control: one per host; a 2xx JSON object at an impossible path discards the host
note: 'MCP-host OAuth discovery added 2026-09-19 (roadmap#321/#337): the harvest visits a provider''s
  primary hosts, and RFC 9728 protected-resource metadata lives on the MCP host, so these documents existed
  and were invisible to the scorer. Fetched live and validated on `resource`/`issuer`; one negative control
  per host.'