generated: '2026-09-19'
method: searched
source: live probes of the /.well-known/ surface on every Plex host in apis.yml
hosts_probed:
- https://plex.tv
- https://www.plex.tv
- https://developer.plex.tv
- https://plexapi.dev
x-notes:
- An A2A agent card DOES answer 200 at https://plexapi.dev/.well-known/agent-card.json, but plexapi.dev
  is a community-run documentation site — the card names its own provider organization as "PlexAPI.dev
  Documentation", not Plex, Inc. It is therefore NOT recorded as a Plex agent card. Plex publishes no
  agent card on any host it operates.
hosts:
- host: ''
  documents:
  - path: /.well-known/security.txt
    status: 200
    file: plex-security.txt
    standard: RFC 9116
    content_type: text/plain
  - path: /.well-known/openid-configuration
    status: 200
    file: plex-openid-configuration.json
    standard: OpenID Connect Discovery 1.0
    content_type: application/json
    note: Discovery document is scoped to the Plex MCP server — issuer https://plex.tv, authorization
      endpoint /admin/mcp/authorize, single scope "mcp".
  - path: /.well-known/oauth-authorization-server
    status: 200
    file: plex-oauth-authorization-server.json
    standard: RFC 8414
    content_type: application/json
  - path: /.well-known/oauth-protected-resource
    status: 200
    file: plex-oauth-protected-resource.json
    standard: RFC 9728
    content_type: application/json
    note: Names https://plex.tv/internal/mcp as the protected resource.
  - path: /.well-known/api-catalog
    status: 404
    standard: RFC 9727
  - path: /.well-known/ai-plugin.json
    status: 404
  - path: /.well-known/agent-card.json
    status: 404
    standard: A2A 1.0.0
  - path: /.well-known/agent.json
    status: 404
    standard: A2A pre-0.3 legacy
  - path: /.well-known/security.txt
    status: 404
    note: The www host answers 404 with the marketing SPA shell; the canonical security.txt lives on the
      apex plex.tv host.
  - path: /.well-known/agent-card.json
    status: 404
  - path: /.well-known/agent-card.json
    status: 404
- host: https://plex.tv
  documents:
  - path: /.well-known/oauth-protected-resource
    status: 200
    file: plex-plex-oauth-protected-resource.json
    bytes: 152
  - path: /.well-known/oauth-authorization-server
    status: 200
    file: plex-plex-oauth-authorization-server.json
    bytes: 506
  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://plex.tv
    path: /.well-known/oauth-protected-resource
    file: plex-plex-oauth-protected-resource.json
  - host: https://plex.tv
    path: /.well-known/oauth-authorization-server
    file: plex-plex-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.'