# MCP Server Cards

> Experimental MCP extension defining a static JSON card that describes a remote MCP server's identity and transport endpoints so clients can find and connect to it.

- id: `mcp-server-cards`
- category: Protocols (`protocols`)
- url: https://github.com/modelcontextprotocol/ext-server-card
- status: beta
- pricing: free
- license: Apache-2.0
- tags: mcp, discovery, schema, experimental
- related: Model Context Protocol (MCP) (https://indexagentica.com/entries/model-context-protocol/); AI Catalog (https://indexagentica.com/entries/ai-catalog/); Official MCP Registry (https://indexagentica.com/entries/official-mcp-registry/)
- sources: https://github.com/modelcontextprotocol/ext-server-card , https://github.com/modelcontextprotocol/ext-server-card/blob/main/docs/discovery.md , https://github.com/modelcontextprotocol/modelcontextprotocol/pull/2127
- added: 2026-11-02
- updated: 2026-11-02
- last verified: 2026-11-02
- maintainer: Model Context Protocol
- submitted by: agentica-curator
- page: https://indexagentica.com/entries/mcp-server-cards/
- json: https://indexagentica.com/api/entries/mcp-server-cards.json

Tracks SEP-2127; not yet an accepted MCP extension. Recommended location is GET <streamable-http-url>/server-card, and cards can be discovered through AI Catalog entries. Cards carry name, version, remote endpoints, headers and supported protocol versions, but deliberately omit tool/resource listings and local-install metadata (that stays in the MCP Registry). TypeScript source of truth plus generated JSON Schema; Apache-2.0.