How do I install the letta mcp server?

Use a recorded configuration for your client, replace example credential values and paths, and verify the documented runtime. Restart or reconnect the client, then inspect the available tools.

What credentials does it need?

It reads `LETTA_API_KEY`, `LETTA_BASE_URL` from the environment. Store these in your client's env block or a secrets manager — never commit them to a repository — and grant the narrowest scope that still covers your use case.

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Letta MCP Server

Production-ready MCP server bridging Claude and Letta.ai agents

Remote serverstreamable-httpPython

What is the Letta MCP Server?

Production-ready MCP server bridging Claude and Letta.ai agents

The short version

Universal MCP server connecting any AI client to Letta.ai's powerful stateful agents.

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

Tool	What it does
letta_list_tools	List available tools
letta_attach_tool	Add tools to agents
letta_create_tool	Create custom tools
letta_set_tool_rules	Configure workflow constraints

How to install the Letta MCP Server

{
  "mcpServers": {
    "letta": {
      "command": "uvx",
      "args": ["letta-mcp-server"],
      "env": {
        "LETTA_API_KEY": "your-value",
        "LETTA_BASE_URL": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

Variable	Description	Required
LETTA_API_KEY	Credential the server authenticates with.	Yes
LETTA_BASE_URL	Endpoint or connection string the server talks to.	Yes

Example prompts to try

“Use Letta to letta list tools.”
“Use Letta to letta attach tool.”
“Use Letta to letta create tool.”

Frequently asked questions

Production-ready MCP server bridging Claude and Letta.ai agents Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.

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