Connect FastMCP servers to Claude Desktop

Auth Support

• Claude supports the 3/26 auth spec and (as of July) the 6/18 auth spec.


• Claude supports Dynamic Client Registration (DCR).
  
  
  • OAuth servers can signal to Claude that a DCR client has been deleted and that Claude should re-register the client by returning an HTTP 401 with an error of invalid_client from the token endpoint, as described in RF

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Claude Desktop functions as an MCP client that can connect to multiple MCP servers, extending Claude's capabilities beyond conversation. When properly configured, these servers enable Claude to:

• Access and manipulate files on your computer


• Perform web searches and retrieve information


• Connect to various APIs and services


• Execute custom tools and

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