Connecting Letta to MCP Servers
Connect Letta agents to tools over Model Context Protocol (MCP)
Letta no longer supports legacy .json
configuration files. Use the ADE or API/SDK.
Letta supports three MCP transport types depending on your deployment and use case.
Connection Methods
- ADE: Point-and-click server management via web interface
- API/SDK: Programmatic integration for production
Transport Types
- Streamable HTTP (Recommended): Production-ready with auth support. Works on Cloud + self-hosted.
- SSE (Legacy): Deprecated but supported for compatibility.
- stdio (Self-hosted only): Local development and testing.
Tool Execution Flow
Quick Start
- Choose transport type based on your deployment
- Connect via ADE: Tool Manager → Add MCP Server
- Attach tools to agents
See remote servers or local servers for detailed setup.