# MQTT

**Canonical:** https://apis.io/apis/realtime/mqtt/  
**Provider:** Realtime — https://apis.io/providers/realtime/  
**Documentation:** https://mqtt.org/

MQTT is one of 26 APIs that [Realtime](https://apis.io/providers/realtime/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include MQTT, IoT, Pub-Sub, Protocol, and Standard.

A lightweight publish/subscribe protocol standardized by OASIS, designed for constrained devices and low-bandwidth networks. MQTT is the dominant realtime protocol in IoT, used by AWS IoT Core, Azure IoT Hub, Google Cloud IoT, HiveMQ, EMQX, and Mosquitto. MQTT v5 adds shared subscriptions, message expiry, reason codes, and topic aliases.

## Machine-readable artifacts (2)

- **Specification** — https://docs.oasis-open.org/mqtt/mqtt/v5.0/mqtt-v5.0.html
- **Portal** — https://mqtt.org/

## Other Realtime APIs (12)

- [WebSocket](https://apis.io/apis/realtime/websocket/)
- [Server-Sent Events (SSE)](https://apis.io/apis/realtime/server-sent-events/)
- [WebRTC](https://apis.io/apis/realtime/webrtc/)
- [CoAP](https://apis.io/apis/realtime/coap/)
- [gRPC Streaming](https://apis.io/apis/realtime/grpc-streaming/)
- [GraphQL Subscriptions](https://apis.io/apis/realtime/graphql-subscriptions/)
- [WebTransport](https://apis.io/apis/realtime/webtransport/)
- [Ably](https://apis.io/apis/realtime/ably/)
- [PubNub](https://apis.io/apis/realtime/pubnub/)
- [Pusher](https://apis.io/apis/realtime/pusher/)
- [LiveKit](https://apis.io/apis/realtime/livekit/)
- [Daily](https://apis.io/apis/realtime/daily/)

## Tags

MQTT, IoT, Pub-Sub, Protocol, Standard

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/realtime/mqtt/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/realtime/.