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Cumulocity

Cumulocity MQTT Service API

Standards-compliant, multi-tenant MQTT broker for application-level messaging that does not need Cumulocity's domain model. Topics are tenant-scoped, persistent, and bridgeable to the Cumulocity domain model via the Dynamic Mapper. Use it as a general-purpose MQTT broker inside your Cumulocity tenant.

Documentation Provider Profile APIs.io AsyncAPI GitHub

Cumulocity MQTT Service API is one of 39 APIs that Cumulocity publishes on the APIs.io network, described by an AsyncAPI event-driven specification.

Tagged areas include IoT, MQTT, Streaming, and Application Integration. The published artifact set on APIs.io includes API documentation and an AsyncAPI specification.

This event API exposes 2 operations across 1 channel, and defines 1 schema. It is described by AsyncAPI 2.6.0, at version 2025.1.

The API connects through a single server, mqtt.{tenant}.cumulocity.com:8883 (mqtts).

2 operations 1 channels 1 schemas

Metadata

The identity and technical contract details declared by the specification.

Specification
AsyncAPI 2.6.0
API Version
2025.1
Base URL
mqtts://mqtt.{tenant}.cumulocity.com:8883
Resource Areas
1

Channels & Operations 2

Across 1 channel, the API surfaces 2 operations. Each is listed below with its action, channel, parameters, and response codes.

Channels 2
SUB
{tenantId}/{topic}
Subscribe to a tenant-scoped MQTT topic.
subscribeGeneric 2 params body
PUB
{tenantId}/{topic}
Publish to a tenant-scoped MQTT topic.
publishGeneric 2 params body

Messages & Schemas 1

The contract defines 1 schema that model the data carried by its messages. Each schema is shown below with its type and property counts.

GenericMessage
message
Arbitrary application payload published on a tenant-scoped topic.

Specification

The full machine-readable AsyncAPI contract behind this narrative.

Source

cumulocity-mqtt-service-asyncapi.yml Raw ↑

Other APIs Cumulocity publishes across the network.

Cumulocity MQTT and SmartREST API
AE Profile APIs.io
Cumulocity Alarms API
AE Profile APIs.io
Cumulocity Application Binaries API
AE Profile APIs.io
Cumulocity Applications API
AE Profile APIs.io
Cumulocity Asset Instances API
AE Profile APIs.io
Cumulocity Asset Models API
AE Profile APIs.io
Cumulocity Audit Records API
AE Profile APIs.io
Cumulocity Bayeux Handshake API
AE Profile APIs.io
Cumulocity Binaries API
AE Profile APIs.io
Cumulocity Bootstrap Users API
AE Profile APIs.io
Cumulocity Bulk Operations API
AE Profile APIs.io
Cumulocity Child References API
AE Profile APIs.io
#IoT#MQTT#Streaming#Application Integration
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API Details
ID
cumulocity:cumulocity-mqtt-service-api
Base URL
mqtts://mqtt.{tenant}.cumulocity.com:8883
Docs
https://cumulocity.com/docs/device-integration/mqtt-service/
Provider
Cumulocity
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