Overview

The Letta MCP Server provides a bridge between AI models and the Letta agent management system. It allows language models to create, manage, and interact with Letta agents, their memories, and associated tools in a standardized way.

Created by:

Developed by Oculair Media

Key Features

🤖

Agent Management

Create, modify, clone, and manage Letta agents

🧠

Memory Operations

Handle memory blocks and passages for agents

🔧

Tool Integration

Attach and manage tools for agents with full MCP support

📊

Enhanced Metadata

Output schemas and behavioral annotations for all tools

Available Tools

The Letta MCP server offers consolidated tools that use a discriminator pattern. You specify the desired operation within the tool arguments.

Quick Reference

Tool	Purpose	Category
`agent`	Manage Letta agents	Agent Management
`memory`	Handle memory blocks	Memory
`tool`	Manage agent tools	Tool Management

Detailed Usage

agent▶

Perform operations on Letta agents, such as creating, listing, or messaging.

// Create a new agent
use_mcp_tool({
  server_name: "letta",
  tool_name: "agent",
  arguments: {
    operation: "create_agent",
    name: "My New Agent",
    model: "openai/gpt-4"
  }
});

// Send a message to an agent
use_mcp_tool({
  server_name: "letta",
  tool_name: "agent",
  arguments: {
    operation: "message_agent",
    agent_id: "agent-123",
    message: "Hello, agent!"
  }
});

memory▶

Manage memory blocks for agents.

// Create a memory block
use_mcp_tool({
  server_name: "letta",
  tool_name: "memory",
  arguments: {
    operation: "create_memory_block",
    name: "agent_persona",
    label: "persona",
    value: "You are a helpful assistant."
  }
});

tool▶

Manage tools for agents.

// List available tools
use_mcp_tool({
  server_name: "letta",
  tool_name: "tool",
  arguments: {
    operation: "list_tools"
  }
});

Installation

{
  "mcpServers": {
    "letta": {
      "command": "npx",
      "args": [
        "-y",
        "letta-mcp-server"
      ],
      "env": {
        "LETTA_BASE_URL": "https://your-letta-instance.com/v1",
        "LETTA_PASSWORD": "your-secure-password"
      }
    }
  }
}

Sources

Business Productivity MCP Servers

The Business & Productivity category provides integration with essential business tools and productivity platforms, enabling efficient workflow management and business process optimization.

Azure DevOps MCP Server

The Azure DevOps MCP Server enables AI models to interact with Azure DevOps, providing capabilities for managing work items, pull requests, pipelines, and more.

Ethereum RPC MCP Server

A TypeScript MCP server that exposes the full Ethereum JSON-RPC surface, enabling AI assistants to query on-chain data, inspect contracts, and retrieve transaction details across EVM networks. Includes optional analytics and Zircuit-specific SLS methods.

Letta MCP Server