generated: '2026-08-13' method: probed source: live GET of the /.well-known/ surface on every Apollo.io host in apis.yml and openapi servers[] note: >- Apollo serves a real RFC 8414 / RFC 9728 / OIDC discovery surface on its MCP host, mcp.apollo.io — the same host the remote MCP server answers on. Nothing is served under /.well-known/ on the API host (api.apollo.io), the marketing host (www.apollo.io), the app host (app.apollo.io) or the docs host (docs.apollo.io). The www and docs hosts answer every /.well-known/ path with an HTTP 404 that still carries the site's HTML shell, so those rows are recorded as misses, not documents. hosts: - host: https://mcp.apollo.io documents: - path: /.well-known/oauth-authorization-server status: 200 content_type: application/json file: apollo-io-oauth-authorization-server.json spec: RFC 8414 - path: /.well-known/oauth-protected-resource status: 200 content_type: application/json file: apollo-io-oauth-protected-resource.json spec: RFC 9728 - path: /.well-known/oauth-protected-resource/mcp status: 200 content_type: application/json spec: RFC 9728 note: identical body to the root oauth-protected-resource document - path: /.well-known/openid-configuration status: 200 content_type: application/json file: apollo-io-openid-configuration.json spec: OpenID Connect Discovery 1.0 - path: /.well-known/agent-card.json status: 401 - path: /.well-known/agent.json status: 401 - path: /.well-known/security.txt status: 401 - host: https://api.apollo.io documents: - path: /.well-known/security.txt status: 404 - path: /.well-known/oauth-authorization-server status: 404 - path: /.well-known/oauth-protected-resource status: 404 - path: /.well-known/agent-card.json status: 404 - host: https://www.apollo.io documents: - path: /.well-known/security.txt status: 404 - path: /.well-known/openid-configuration status: 404 - path: /.well-known/api-catalog status: 404 - path: /.well-known/ai-plugin.json status: 404 - path: /.well-known/agent-card.json status: 404 - path: /.well-known/agent.json status: 404 - host: https://app.apollo.io documents: - path: /.well-known/oauth-authorization-server status: 404 - host: https://docs.apollo.io documents: - path: /.well-known/agent-card.json status: 404 summary: hits: 4 misses: 17 security_txt: false api_catalog: false ai_plugin: false agent_card: false oauth_metadata: true