Show HN: AI-powered web service combining FastAPI, Pydantic-AI, and MCP servers

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Hey all!
I recently gave a workshop talk at PyCon Greece 2025 about building production-ready agent systems.

To check the workshop, I put together a demo repo: (I will add the slides too soon in my blog: https://www.petrostechchronicles.com/)
https://github.com/Aherontas/Pycon_Greece_2025_Presentation_…

The idea was to show how multiple AI agents can collaborate using FastAPI + Pydantic-AI, with protocols like MCP (Model Context Protocol) and A2A (Agent-to-Agent) for safe communication and orchestration.

Features:

– Multiple agents running in containers

– MCP servers (Brave search, GitHub, filesystem, etc.) as tools

– A2A communication between services

– Minimal UI for experimentation for Tech Trend – repo analysis

I built this repo because most agent frameworks look great in isolated demos, but fall apart when you try to glue agents together into a real application. My goal was to help people experiment with these patterns and move closer to real-world use cases.

It’s not production-grade, but would love feedback, criticism, or war stories from anyone who’s tried building actual multi-agent systems.
Big questions:

Do you think agent-to-agent protocols like MCP/A2A will stick?

Or will the future be mostly single powerful LLMs with plugin stacks?

Thanks — excited to hear what the HN crowd thinks!


Comments URL: https://news.ycombinator.com/item?id=45243320

Points: 1

# Comments: 0

Source: github.com

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