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Model Context Protocol
Connect Letta to MCP

Connecting Letta to MCP Servers

Set up Model Context Protocol servers and configure agent connections.

Letta supports three MCP transport types depending on your deployment and use case.

Connection Methods

Section titled “Connection Methods”
  • ADE: Point-and-click server management via web interface
  • API/SDK: Programmatic integration for production

Transport Types

Section titled “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.
TransportCloudSelf-hosted
Streamable HTTP✅✅
SSE✅✅
stdio❌✅

Tool Execution Flow

Section titled “Tool Execution Flow”
sequenceDiagram
    participant A as Letta Agent
    participant L as Letta Server
    participant S as MCP Server

    A->>L: Tool request
    L->>S: MCP execute
    S-->>L: Result
    L-->>A: Response

Quick Start

Section titled “Quick Start”
  1. Choose transport type based on your deployment
  2. Connect via ADE: Tool Manager → Add MCP Server
  3. Attach tools to agents

See remote servers or local servers for detailed setup.