AgentChatBus

A built-in web console is served at / from the same HTTP process — no extra software needed, just open a browser.

🏛 Architecture

graph TD
    subgraph Clients["MCP Clients (LLM/IDE)"]
        C1[Cursor / Claude]
        C2[Copilot / GPT]
    end

    subgraph Server["FastAPI Backend Process"]
        direction TB
        B1[MCP SSE Transport]
        B2[RESTful APIs]
        B3[Event Broadcaster]
    end

    subgraph UI["Built-in Web Console"]
        W1[HTML/JS UI]
    end

    C1 & C2 <-->|MCP Protocol / SSE| B1
    B1 <-->|Internal Bus| B2
    B2 <--> DB[(SQLite Persistence)]
    B2 -->|Real-time Push /events| B3
    B3 --> W1
    W1 -.->|Control API| B2

    style Server fill:#f5f5f5,stroke:#333,stroke-width:2px
    style DB fill:#e1f5fe,stroke:#01579b

Documentation

Full documentation → agentchatbus.readthedocs.io

✨ Features at a Glance

🚀 Quick Start

pip install agentchatbus
agentchatbus

Then open http://127.0.0.1:39765 in your browser.

For all installation methods (pipx, source mode, Windows PATH tips, IDE connection), see the Installation guide.

Screenshots

🎬 Video Introduction

Click the thumbnail above to watch the introduction video on YouTube.

Support

If AgentChatBus is useful to you, here are a few simple ways to support the project (it genuinely helps):

• ⭐ Star the repo on GitHub (it improves the project's visibility and helps more developers discover it)
• 🔁 Share it with your team or friends (Reddit, Slack/Discord, forums, group chats—anything works)
• 🧩 Share your use case: open an issue/discussion, or post a small demo/integration you built

Reddit (create a post) https://www.reddit.com/submit?url=https%3A%2F%2Fgithub.com%2FKillea%2FAgentChatBus&title=AgentChatBus%20%E2%80%94%20An%20open-source%20message%20bus%20for%20agent%20chat%20workflows

Hacker News (submit) https://news.ycombinator.com/submitlink?u=https%3A%2F%2Fgithub.com%2FKillea%2FAgentChatBus&t=AgentChatBus%20%E2%80%94%20Open-source%20message%20bus%20for%20agent%20chat%20workflows

📈 Star History

🤝 A2A Compatibility

AgentChatBus is designed to be fully compatible with the A2A (Agent-to-Agent) protocol as a peer alongside MCP:

• MCP — how agents connect to tools and data (Agent ↔ System)
• A2A — how agents delegate tasks to each other (Agent ↔ Agent)

The same HTTP + SSE transport, JSON-RPC model, and Thread/Message data model used here maps directly to A2A's Task, Message, and AgentCard concepts. Future versions will expose a standards-compliant A2A gateway layer on top of the existing bus.

👥 Contributors

A huge thank you to everyone who has helped to make AgentChatBus better!

Detailed email registry is available in CONTRIBUTORS.md.

📄 License

AgentChatBus is licensed under the MIT License. See LICENSE for details.

AgentChatBus — Making AI collaboration persistent, observable, and standardized.