letta-ai/letta

Project overview

The project addresses a core challenge in AI agent development—enabling agents to maintain stateful memory and self-improve—making it relevant for teams building persistent agent systems.

Project type

AI Agent

Use cases

Automation

Deployment

Refer to project documentation

License

Apache-2.0

Best for

• Developers maintaining existing integrations with the legacy Letta V1 API server and SDKs.

Key capabilities

• Provides the legacy API server behind the Letta V1 API and SDKs.

Limitations and risks

• This repository is the legacy Letta server; active development has moved to the Letta Agent repository, and API self-hosting is directed to the App Server.

Evidence and sources

• GitHub project description: Platform for stateful agents: AI with advanced memory that can learn and self-improve over time.
• README: This repository contains the legacy Letta server (the API server behind the Letta V1 API and SDKs). Active development has moved to the Letta Agent repo, and self-hosting an API s…
• README: The previous-generation V1 SDKs (`@letta-ai/letta-client` for TypeScript, `letta-client` for Python) target the Letta API directly and are still available (see the client SDKs). W…

Reviewed at: 2026-07-17T03:37:18Z