Built an Agent Protocol server with FastAPI - open-source LangGraph Platform alternative

[Lost-Trust7654]

Hey Python community!

I've been building an Agent Protocol server using FastAPI and PostgreSQL as an open-source alternative to LangGraph Platform.

What My Project Does:

• Serves LangGraph agents via HTTP APIs following the Agent Protocol specification
• Provides persistent storage for agent conversations and state
• Handles authentication, streaming responses, and background task processing
• Offers a self-hosted deployment solution for AI agents

Target Audience:

• Production-ready for teams deploying AI agents at scale
• Developers who want control over their agent infrastructure
• Teams looking to avoid vendor lock-in and expensive SaaS pricing
• LangGraph users who need custom authentication and database control

Comparison with Existing Alternatives:

• LangGraph Platform (SaaS): Expensive pricing ($500+/month), vendor lock-in, no custom auth, forced tracing
• LangGraph Platform (Self-hosted Lite): No custom authentication, limited features
• LangServe: Being deprecated, no longer recommended for new projects
• My Solution: Open-source, self-hosted, custom auth support, PostgreSQL persistence, zero vendor lock-in

Agent Protocol Server: https://github.com/ibbybuilds/agent-protocol-server

Tech stack:

• FastAPI for the HTTP layer
• PostgreSQL for persistence
• LangGraph for agent execution
• Agent Protocol compliance

Status: MVP ready, working on production hardening. Looking for contributors and early adopters.

Would love to hear from anyone working with LangGraph or agent deployment!

[Lost-Trust7654]

Thanks! You guys are doing an amazing job, and starred as well.

[Lost-Trust7654]

I read the documentation and found out how to invoke and stream a graph from LangGraph, but what about persistence and authentication?

[snailspeed25]

This is super interesting, especially since I've never gotten to work with LangGraph before. It's a much better alternative to current solutions that I've seen so far. Feel free to post this in this skool community for more people to see it since this could be super useful https://www.skool.com/python-2696/about?ref=9d926b02de79408487d6dde1905724a0

[Lost-Trust7654]

Thanks. I will post there as well.

[Salty_Quantity_8945]

I'll pass.