gmqtt
Client for MQTT protocol
Decision gist · record as of 2026-08-14
Yes. gmqtt is a solid, actively maintained MQTT client with zero dependencies, permissive licensing, and broad protocol support. Install it if you need async MQTT connectivity in Python and are comfortable with callback-based event handling. The 630 days since last release is not a concern given the active repository and recent commits; the library is stable rather than abandoned.AI-flagged interpretation of the facts on this page — verify before relying
Before you install
- Requires Python 3.5 or later and an accessible MQTT broker at connection time.
- Low friction: pure Python wheel with no runtime dependencies.
- Actively maintained with recent commits and a stable release history since 2018.
License · maintenance · safety
MIT (permissive) — MIT license is permissive; you can use, modify, and distribute gmqtt freely in commercial and open-source projects with minimal restrictions.
last release 2024-11-22 (630 days) · last repo commit 2026-06-14 · 450 stars
0 known vulnerabilities (OSV.dev, 2026-08-14) · 159,368 downloads/mo, #10,698 on PyPI
Alternatives
Verify before relying
pip install gmqtt
import asyncio
from gmqtt import Client as MQTTClient
async def main():
client = MQTTClient("client-id")
client.on_message = lambda c, t, p, q, pr: print(p)
await client.connect("mqtt.broker.host")
client.subscribe("topic/name")
await asyncio.sleep(10)
await client.disconnect()
asyncio.run(main())- Whether uvloop integration (mentioned in docs) provides measurable performance gains for typical workloads.
- Behavior and compatibility with brokers that do not support MQTT 5.0 downgrade negotiation.
- Performance characteristics under high message throughput or with many concurrent subscriptions.
What it is and what it does
gmqtt is a pure-Python async MQTT client library built on asyncio for connecting to MQTT brokers and exchanging messages. It implements both MQTT 5.0 (default) and 3.1.1 protocols, with automatic downgrade if a broker does not support version 5.0. The client handles subscriptions, message publishing with configurable QoS levels, authentication, and automatic reconnection with tunable retry behavior.
The library is callback-driven: you define handlers for connect, message receipt, disconnect, and subscribe events, then await the main connection loop. It supports MQTT 5.0 properties (session expiry, maximum packet size, user properties, content type, message expiry) and allows both synchronous and asynchronous message handlers. No external dependencies are required beyond Python's standard asyncio, making it lightweight and straightforward to integrate into async applications.
Use it for
- Build IoT device clients that publish sensor data and subscribe to control commands over MQTT.
- Create real-time message brokers or gateways that relay MQTT traffic between multiple topics or brokers.
- Implement monitoring dashboards that subscribe to device telemetry and display live updates.
- Develop async Python services that need to communicate via MQTT without blocking the event loop.
- Test MQTT broker behavior and message flow by scripting client interactions in Python.
Worth the install?
AI-flagged interpretation of the facts on this page. Verify before relying on it.
Yes.
gmqtt is a solid, actively maintained MQTT client with zero dependencies, permissive licensing, and broad protocol support. Install it if you need async MQTT connectivity in Python and are comfortable with callback-based event handling. The 630 days since last release is not a concern given the active repository and recent commits; the library is stable rather than abandoned.
Install
gmqtt on PyPI
Before you install
Low friction: pure Python wheel with no runtime dependencies. Actively maintained with recent commits and a stable release history since 2018.
Requires Python 3.5 or later and an accessible MQTT broker at connection time.
License in practice
MIT license is permissive; you can use, modify, and distribute gmqtt freely in commercial and open-source projects with minimal restrictions.
Quickstart
pip install gmqtt
import asyncio
from gmqtt import Client as MQTTClient
async def main():
client = MQTTClient("client-id")
client.on_message = lambda c, t, p, q, pr: print(p)
await client.connect("mqtt.broker.host")
client.subscribe("topic/name")
await asyncio.sleep(10)
await client.disconnect()
asyncio.run(main())Verify before relying
- Whether uvloop integration (mentioned in docs) provides measurable performance gains for typical workloads.
- Behavior and compatibility with brokers that do not support MQTT 5.0 downgrade negotiation.
- Performance characteristics under high message throughput or with many concurrent subscriptions.
Package facts
| License | MIT permissive |
| Python support | Supports the current Python release >=3.5 |
| Install friction | Low. Pure-Python wheel |
| Runtime dependencies | None |
| Maintenance | Actively maintained 630 days since the last release |
| Last repo commit | |
| First released | |
| Downloads | 159,368 / month, #10,698 on PyPI 30-day window, as of 2026-08-14 |
| Known vulnerabilities | None known OSV.dev, checked 2026-08-14 |
| Classifiers | Development Status :: 5 - Production/StableIntended Audience :: DevelopersLicense :: OSI Approved :: MIT LicenseNatural Language :: EnglishOperating System :: OS IndependentProgramming Language :: PythonTopic :: Software Development :: Libraries :: Python Modules |
Evidence: gmqtt-0.7.0-py3-none-any.whl
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