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Letta MCP Server

by oculairmedia
GitHub
JavaScript
MIT License
13
  • Linux
  • Apple
OverviewInspectNewSchemaRelated ServersReviewsScore
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Integrations

  • Uses .env files for configuration, allowing storage of Letta API credentials and endpoints securely outside of the codebase.

  • Repository hosting for the Letta MCP server, enabling version control, contribution workflows, and distribution of the server code.

  • Provides package management for the Letta MCP server, managing dependencies and offering scripts for building and running the server.

Letta MCP Server

A server that provides tools for agent management, memory operations, and integration with the Letta system.

Quick Setup

Option 1: Run with Node.js

# Development (with hot reload) npm run dev:sse # SSE transport # Production npm run build # Build TypeScript first npm run start:sse # SSE transport

Option 2: Run with Docker

# Build and run locally docker build -t letta-mcp-server . docker run -d -p 3001:3001 -e PORT=3001 -e NODE_ENV=production --name letta-mcp letta-mcp-server # Or use the public image docker run -d -p 3001:3001 -e PORT=3001 -e NODE_ENV=production --name letta-mcp ghcr.io/oculairmedia/letta-mcp-server:latest

Directory Structure

  • index.js - Main entry point
  • core/ - Core server functionality
  • tools/ - Individual tool implementations
  • transports/ - Server transport implementations (stdio and SSE)

Available Tools

Agent Management

ToolDescriptionRequired ParametersOptional Parameters
create_agentCreate a new Letta agentname, descriptionmodel, embedding
list_agentsList all available agents-filter
prompt_agentSend a message to an agentagent_id, message-
get_agentGet agent details by IDagent_id-
modify_agentUpdate an existing agentagent_id, update_data-
delete_agentDelete an agentagent_id-
clone_agentClone an existing agentsource_agent_id, new_agent_nameoverride_existing_tools, project_id
bulk_delete_agentsDelete multiple agents-agent_ids, agent_name_filter, agent_tag_filter

Memory Management

ToolDescriptionRequired ParametersOptional Parameters
list_memory_blocksList all memory blocks-filter, agent_id, page, pageSize, label
create_memory_blockCreate a new memory blockname, label, valueagent_id, metadata
read_memory_blockRead a memory blockblock_idagent_id
update_memory_blockUpdate a memory blockblock_idvalue, metadata, agent_id
attach_memory_blockAttach memory to an agentblock_id, agent_idlabel

Tool Management

ToolDescriptionRequired ParametersOptional Parameters
list_toolsList all available tools-filter, page, pageSize
list_agent_toolsList tools for a specific agentagent_id-
attach_toolAttach tools to an agentagent_idtool_id, tool_ids, tool_names
upload_toolUpload a new toolname, description, source_codecategory, agent_id
bulk_attach_tool_to_agentsAttach a tool to multiple agentstool_idagent_name_filter, agent_tag_filter

Additional Tools

  • Model Management: list_llm_models, list_embedding_models
  • Archive Management: list_passages, create_passage, modify_passage, delete_passage
  • MCP Server Management: list_mcp_servers, list_mcp_tools_by_server
  • Import/Export: export_agent, import_agent

Docker Operations

# View container logs docker logs -f letta-mcp # Stop the container docker stop letta-mcp # Update to latest version docker pull ghcr.io/oculairmedia/letta-mcp-server:latest docker stop letta-mcp docker rm letta-mcp docker run -d -p 3001:3001 -e PORT=3001 -e NODE_ENV=production --name letta-mcp ghcr.io/oculairmedia/letta-mcp-server:latest

Configuration with MCP Settings

Add the server to your mcp_settings.json:

"letta": { "command": "node", "args": [ "--no-warnings", "--experimental-modules", "path/to/letta-server/index.js" ], "env": { "LETTA_BASE_URL": "https://your-letta-instance.com", "LETTA_PASSWORD": "yourPassword" }, "disabled": false, "alwaysAllow": [ "upload_tool", "attach_tool", "list_agents", "list_memory_blocks" ], "timeout": 300 }

For remote instances, use the URL configuration:

"remote_letta_tools": { "url": "http://your-server:3001/sse", "disabled": false, "alwaysAllow": [ "attach_tool", "list_agents", "list_tools", "get_agent" ], "timeout": 120 }

You must be authenticated.

A
security – no known vulnerabilities
A
license - permissive license
A
quality - confirmed to work

hybrid server

The server is able to function both locally and remotely, depending on the configuration or use case.

Tools

View all tools

An MCP server implementation that enables interaction with the Letta API for managing agents, memory blocks, and tools in the Letta system.

  1. Quick Setup
    1. Option 1: Run with Node.js
    2. Option 2: Run with Docker
  2. Directory Structure
    1. Available Tools
      1. Agent Management
      2. Memory Management
      3. Tool Management
      4. Additional Tools
    2. Docker Operations
      1. Configuration with MCP Settings

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