What is a message bus for AI agents?

It's a lightweight system for agents to send/receive persistent messages — tasks, queries, broadcasts — without complex queues. HTTP API + storage like SQLite does it perfectly for low-volume, intermittent agents.

How to build a message bus with HTTP and SQLite?

Spin up a Node.js server with /api/send (POST) and /api/inbox/:id (GET). Store in SQLite with sender/receiver tables. Add tokens, rate limits. Agents POST to send, poll to read. Done in hours.

Does this scale beyond 20 AI agents?

For hundreds of low-freq messages? Yes, easily — SQLite handles it, or swap to Postgres later. But if you're blasting millions, revisit queues. Matches most agent setups today.

🤖 AI Dev Tools

HTTP + SQLite: The Dead-Simple Bus Powering 20+ AI Agents

Scale to 20 AI agents? Forget bloated queues. A humble HTTP endpoint and SQLite file keep them chatting reliably, like email for robots.

DevTools Feed Apr 03, 2026 4 min read

Diagram showing AI agents sending messages via HTTP to a central SQLite-powered bus

⚡ Key Takeaways

HTTP + SQLite crushes enterprise queues for AI agent comms — simple, persistent, pull-based. 𝕏
Lessons: Prioritize no-loss over speed; rate-limit broadcasts; fallback modes for resilience. 𝕏
This is AI's SMTP: Dumb reliability enables agent swarms without infrastructure nightmares. 𝕏

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