buf.build
Buf provides tooling and hosted services for working with Protocol Buffers, gRPC, and ConnectRPC, including the Buf CLI and the Buf Schema Registry. It is used to manage schemas, generate code, and interact with Protobuf-based APIs and registry resources.
buf.build exposes an OAuth-protected MCP server at `https://buf.build/mcp` and a `buf` CLI that authenticates to the Buf Schema Registry with a Buf API token.
- Buf MCP Serverdetected
- Buf CLIdiscovered
$ buf registry loginAcquired by the CLI — running buf registry login opens the auth flow and stores the credential.
Point your MCP client at the server URL and approve access in the browser. The server supports OAuth Dynamic Client Registration (RFC 7591), so the client registers itself automatically — no developer-portal app, client_id, or client_secret to create.
conventions · 1/7 published
- integrations.json——
- llms.txt✗
/llms.txt - API catalog✗
/.well-known/api-catalog - OpenAPI document✗
/api/schema/, /openapi.json, /swagger.json, /api/openapi.json, or /v1/openapi.json - MCP server card✗
/.well-known/mcp/server-card.json - OAuth protected resource✓https://buf.build/.well-known/oauth-protected-resource
- Agent card✗
/.well-known/agent-card.json - Agent skills✗
/.well-known/agent-skills/index.json
Publish these signals → /publishing