Deploy and Host Letta on Railway

Letta (formerly MemGPT) builds stateful agents with long-term memory that learn and improve over time.

About Hosting Letta

This template runs the official letta/letta:latest image as the Letta App Server (WebSocket) with agent state on a persistent volume at /root/.letta. Access requires a capability token: a random LETTA_APP_SERVER_TOKEN is generated into the service variables (read it in the Variables tab). Add your model provider key (for example ANTHROPIC_API_KEY or OPENAI_API_KEY) as a service variable after deploying. Connect Letta Code or the Letta Agent SDK to wss:// with the token. Agents can run shell commands on this service, so keep the token private.

Common Use Cases

Run a self-hosted Letta app server for your agents
Agents with persistent memory across conversations
Connect the Letta Agent SDK or Letta Code to a remote server

Dependencies for Letta Hosting

One service with a volume; nothing else

Deployment Dependencies

Why Deploy Letta on Railway?

Railway gives you a public HTTPS URL, persistent storage where needed and automatic restarts with no server to maintain. Check /readyz on the public URL to confirm the server is up.