langhost

Open-source, self-hosted LangGraph Agent Server with no license key required.

PlatformWebfreeglobal

langhost is an open-source, self-hosted LangGraph Agent Server that runs on a developer's own Postgres and Redis, fully compatible with LangSmith Studio, the LangGraph SDK, and MCP/A2A protocols with no license key required. An existing LangGraph project can add it with zero code changes to get production-grade persistence. It's built for developers deploying LangGraph agents to production who want to avoid the official server's proprietary licensed persistence.

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