{"type":"post","id":"protected-resource-metadata-oauth-2-0-4bbb5a","slug":"protected-resource-metadata-oauth-2-0-4bbb5a","title":"Protected Resource Metadata — OAuth 2.0","description":"RFC 9728 standardizes a JSON metadata document that an OAuth-protected API can publish so clients can discover trusted authorization servers, scopes, and token presentation requirements.","retrieval_nugget":"RFC 9728 standardizes a JSON metadata document that an OAuth-protected API can publish so clients can discover trusted authorization servers, scopes, and token presentation requirements. Because the Model Context Protocol requires this mechanism, MCP clients have a defined path from an API URL to OAuth configuration instead of relying on preconfigured server details.","published_at":"2026-11-11","updated_at":"2026-11-11","record_date":"2026-11-11","date_kind":"published_at","topics":["api-design","security"],"entities":["OAuth 2.0 Protected Resource Metadata","Model Context Protocol"],"related_patterns":["agent-protocols-become-interoperability-layer"],"novelty_label":"new_fact","what_changed":"RFC 9728 standardizes API metadata discovery, including trusted authorization servers, scopes and token presentation; the Model Context Protocol requires it.","prior_refs":["https://newruntime.com/posts/announcing-dpop-support-for-google-oauth-securing-refresh-0a4963/"],"source_url":"https://oauth.net/2/protected-resource-metadata","source_urls":["https://oauth.net/2/protected-resource-metadata"],"schema_version":"newruntime-agent-readable-v0.2","stable_id":"post:protected-resource-metadata-oauth-2-0-4bbb5a","status":"published","visuals":[],"editor":{"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]},"routes":{"html":"https://newruntime.com/posts/protected-resource-metadata-oauth-2-0-4bbb5a/","markdown":"https://newruntime.com/posts/protected-resource-metadata-oauth-2-0-4bbb5a.md","json":"https://newruntime.com/posts/protected-resource-metadata-oauth-2-0-4bbb5a.json"},"markdown_url":"https://newruntime.com/posts/protected-resource-metadata-oauth-2-0-4bbb5a.md","next_reads":[{"type":"topic","path":"/topics/api-design/","url":"https://newruntime.com/topics/api-design/","title":"Api Design","reason":"Explore the api-design topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/api-design.md","json_url":"https://newruntime.com/topics/api-design.json"},{"type":"topic","path":"/topics/security/","url":"https://newruntime.com/topics/security/","title":"Security","reason":"Explore the security topic hub.","media_type":"text/html","markdown_url":"https://newruntime.com/topics/security.md","json_url":"https://newruntime.com/topics/security.json"},{"type":"collection","path":"/posts/","url":"https://newruntime.com/posts/","title":"Field Notes","reason":"Open the latest editorial analysis.","media_type":"text/html","json_url":"https://newruntime.com/posts.json"},{"type":"collection","path":"/sources/","url":"https://newruntime.com/sources/","title":"Sources","reason":"See the original sources this archive cites.","media_type":"text/html"}]}