generated: '2026-09-19'
method: searched
source: Live probes of the /.well-known/ surface on the GitHub API and web hosts.
hosts:
- host: https://api.github.com
  documents:
  - path: /.well-known/security.txt
    status: 404
  - path: /.well-known/openid-configuration
    status: 404
  - path: /.well-known/oauth-authorization-server
    status: 404
  - path: /.well-known/api-catalog
    status: 404
  - path: /.well-known/ai-plugin.json
    status: 404
- host: https://github.com
  documents:
  - path: /.well-known/security.txt
    status: 200
    file: github-copilot-security.txt
  - path: /.well-known/openid-configuration
    status: 404
  - path: /.well-known/oauth-authorization-server
    status: 404
  - path: /.well-known/api-catalog
    status: 404
  - path: /.well-known/ai-plugin.json
    status: 404
  - path: /.well-known/oauth-authorization-server/login/oauth
    status: 200
    file: github-copilot-github-oauth-authorization-server.json
    bytes: 653
  path_echo_control: passed
- host: https://docs.github.com
  documents:
  - path: /.well-known/security.txt
    status: 404
  - path: /.well-known/openid-configuration
    status: 404
- host: https://api.githubcopilot.com
  documents:
  - path: /.well-known/oauth-protected-resource
    status: 200
    file: github-copilot-api-oauth-protected-resource.json
    bytes: 328
  path_echo_control: passed
notes: Only the org-wide RFC 9116 security.txt at github.com resolves. GitHub does not expose OIDC/OAuth
  authorization-server discovery documents at these hosts; OAuth endpoints are documented at https://github.com/login/oauth
  (see authentication/github-copilot-authentication.yml). GitHub Actions OIDC uses a separate token host
  (token.actions.githubusercontent.com) not probed here.
x-mcp-probe:
  probed: '2026-09-19'
  issue: roadmap#321, roadmap#337
  documents:
  - host: https://api.githubcopilot.com
    path: /.well-known/oauth-protected-resource
    file: github-copilot-api-oauth-protected-resource.json
  - host: https://github.com
    path: /.well-known/oauth-authorization-server/login/oauth
    file: github-copilot-github-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.'