Mqtt
Lightweight publish/subscribe messaging protocol for connecting IoT devices with minimal bandwidth
| What is it | Lightweight publish/subscribe messaging protocol for connecting IoT devices with minimal bandwidth |
|---|---|
| Pricing | Unknown |
| Platform | API |
| Works with | n8n |
| Best for | Connecting remote sensors and actuators, Device-to-cloud data streaming |
| Domain registered | 2004 |
Data updated Aug. 1, 2026
What does Mqtt do?
Mqtt is an OASIS standard messaging protocol built for the Internet of Things. It uses a publish/subscribe model to move data between devices, gateways, and cloud services. The protocol is designed to be extremely lightweight — message headers are tiny, and client libraries can run on microcontrollers with limited memory and processing power. This makes Mqtt a natural fit for scenarios where bandwidth is scarce or devices are battery-powered.
Mqtt works by having clients publish messages to topics, and other clients subscribe to those topics. A broker handles routing. The protocol offers three quality-of-service levels: at most once, at least once, and exactly once. This lets developers choose the right trade-off between speed and reliability. Mqtt also supports persistent sessions, so if a device loses its cellular connection, it can reconnect quickly without missing messages. Security is built in via TLS encryption and modern authentication like OAuth.
Industries from automotive to smart home rely on Mqtt for real-time data exchange. If you're building an IoT system — whether it's a fleet of delivery trucks, a factory floor, or a connected thermostat — Mqtt gives you a simple, proven way to move messages reliably at scale. It's not flashy, but it gets the job done.
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