MQTT for AI

Specifications and SDKs for using MQTT as a transport layer in AI agent systems.

Documentation: emqx.com/mqtt-for-ai

Specifications

Specification	Description
A2A over MQTT	Agent-to-Agent protocol over MQTT — agent discovery, request/reply, and event delivery
MCP over MQTT	Model Context Protocol transport layer over MQTT
MQTT/RT	Real-time messaging bus over MQTT/UDP
MQTT over QUIC	MQTT over QUIC transport protocol
MQTT Queues & Streams	Queue and stream abstractions for MQTT
MQTT Subscription Filters	MQTT 5.0 subscription filter enhancements
MQTT Batch Publishing	MQTT 5.0 batch publishing

SDKs

A2A over MQTT — Python

pip install a2a-over-mqtt

See the SDK documentation for usage details.

Website Development

The documentation site is built with VitePress.

Requirements: Node.js >= 22, PNPM >= 10

pnpm install
pnpm run dev      # serve with hot reload at localhost:5173
pnpm run build    # build for production