LangChain MCP: Stateless protocol, extraction functions, and other updates
LangChain has moved MCP support into the main package and upgraded to the FastMCP protocol, enabling stateless interaction, tool list caching, and interruptible extraction features. The new protocol, supported by LangGraph, enables a 98x increase in ChatGPT tool calls, allowing clients to cache tool directories and handle model request parameters. MCPAdapter supports multi-server connections and OAuth 2.1 authentication, enabling servers to be independently configured for authentication and transport layers.








