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TDMQ for MQTT

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DocumentationTDMQ for MQTTDevelopment GuideData Plane HTTP API DescriptionHTTP API Overview and Limitations

HTTP API Overview and Limitations

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Last updated: 2026-04-01 16:37:50

Overview

TDMQ for MQTT provides HTTP-based APIs that support querying client online status, publishing MQTT messages, and more. Send HTTPS/HTTP GET or POST requests to the server address and include the required request parameters as described in each API reference. TDMQ for MQTT returns the processing results accordingly. API calls are subject to rate limiting, and each call consumes the cluster's TPS quota. This is particularly useful for managing large-scale device fleets (such as millions of devices) and enables efficient communication through HTTP data streaming APIs.

For details on calling the HTTP APIs, see the following documents:
Querying Client Online Status
Publishing MQTT Messages via HTTP POST
Dynamically Modifying Client Keep Alive Time

Common Request Parameters

Parameter
Description
Example
instance-access-point
Instance access endpoint. Obtain this from the Cluster Management > Basic Information page in the console.
mqtt-xxxx-public.mqtt.tencenttdmq.com
client_id
Unique client identifier (ClientId). For specifications, see Client Identifier (ClientID).
curl001

Use Limits

Description
Limit
Supported Protocol Versions
HTTP 1.0 and HTTP 1.1
Supports both HTTP and HTTPS. HTTPS is recommended for use with certificate authentication
Request Method
The query API supports GET/POST
The message publishing API supports POST
Interface Specifications
Each client status query is equivalent to publishing a QoS=0 message. The query rate is subject to the instance QPS quota
The message publishing API supports setting the QoS level (default: QoS=1) and the Retained flag
For details, see Billing Overview

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