--- title: "server/discover: definition and example | Agent MCP Directory" description: "server/discover: The 2026-07-28 RPC every server MUST implement to advertise supported protocol versions, capabilities and identity." canonical: https://agentmcpdirectory.com/glossary/server-discover site: "Agent MCP Directory" last_updated: 2026-11-04 section: "Glossary" --- # server/discover: definition and example | Agent MCP Directory > server/discover: The 2026-07-28 RPC every server MUST implement to advertise supported protocol versions, capabilities and identity. Source: https://agentmcpdirectory.com/glossary/server-discover Site: Agent MCP Directory Last reviewed: 2026-11-04 # server/discover server/discover: The 2026-07-28 RPC every server MUST implement to advertise supported protocol versions, capabilities and identity. Example: Clients may call it first or use it to probe older stdio servers. Next in the glossary is Stateless MCP: The 2026-07-28 model with no initialize handshake and no Mcp-Session-Id; each request carries version and capabilities in \_meta. ## Definition The 2026-07-28 RPC every server MUST implement to advertise supported protocol versions, capabilities and identity. ## Example, with source Clients may call it first or use it to probe older stdio servers. ([modelcontextprotocol.io](https://modelcontextprotocol.io/specification/2026-07-28/changelog), read 4 November 2026) ## Neighbouring terms - [server.json](https://agentmcpdirectory.com/glossary/server-json/): The registry metadata file for one server: name, version, remotes, packages, website and repository. - [Stateless MCP](https://agentmcpdirectory.com/glossary/stateless-mcp/): The 2026-07-28 model with no initialize handshake and no Mcp-Session-Id; each request carries version and capabilities in \_meta. - [stdio transport](https://agentmcpdirectory.com/glossary/stdio-transport/): The MCP binding where a client launches the server as a subprocess and exchanges newline-delimited JSON-RPC over standard streams. Edition 4 November 2026 Method [How rows are verified](https://agentmcpdirectory.com/method/) Data [CSV and JSON](https://agentmcpdirectory.com/data/) Markdown [This page as markdown](https://agentmcpdirectory.com/glossary/server-discover/index.md) ## Sources - [Source for the server/discover example](https://modelcontextprotocol.io/specification/2026-07-28/changelog), read 4 November 2026 Last reviewed 4 November 2026