letta-ai/letta is the legacy Letta API server that underpins the Letta V1 API and SDKs for building stateful AI agents with advanced memory. Active development has moved to the Letta Agent repository, and API self-hosting is directed to the App Server.
Project overview
The project established the foundation for stateful agents that can learn and self-improve over time through advanced memory, and its legacy server still underpins the V1 API and SDKs.
Project type
AI Agent
Use cases
Automation
Deployment
Refer to project documentation
License
Apache-2.0
Best for
Developers working with the legacy Letta V1 API and SDKs who need the server that underpins them.
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…