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Cumulocity

Cumulocity MQTT and SmartREST API

Constrained-device MQTT broker fronting the Cumulocity REST API with a CSV-based SmartREST 2.0 payload format that saves up to 80% of mobile traffic versus JSON. Supports static templates for common operations (s/us topic family) and tenant-defined custom templates. 16 KiB max payload, MQTT 3.1.1 and 5.0 supported, TLS on port 8883.

Documentation Provider Profile APIs.io AsyncAPI GitHub

Cumulocity MQTT and SmartREST 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, SmartREST, Device Integration, and Telemetry. The published artifact set on APIs.io includes API documentation and an AsyncAPI specification.

This event API exposes 5 operations across 5 channels, and defines 2 schemas. It is described by AsyncAPI 2.6.0, at version 10.20.0.

The API connects through 2 servers: {tenant}.cumulocity.com:8883 (mqtts), {tenant}.cumulocity.com:1883 (mqtt).

5 operations 5 channels 2 schemas

Metadata

The identity and technical contract details declared by the specification.

Specification
AsyncAPI 2.6.0
API Version
10.20.0
Base URL
mqtt://{tenant}.cumulocity.com:1883
Contact
Cumulocity
Resource Areas
1

Channels & Operations 5

Across 5 channels, the API surfaces 5 operations. Each is listed below with its action, channel, parameters, and response codes.

Channels 5
PUB
s/us
Publish a SmartREST 2.0 static-template message.
publishSmartRestStatic body
SUB
s/ds
Subscribe to operations delivered as SmartREST 2.0 static-template messages.
subscribeSmartRestStatic body
PUB
s/uc/{templateXId}
Publish a SmartREST 2.0 custom-template message.
publishSmartRestCustom 1 param body
SUB
s/dc/{templateXId}
Subscribe to custom-template operations.
subscribeSmartRestCustom 1 param body
SUB
s/e
Subscribe to error notifications.
subscribeErrors body

Messages & Schemas 2

The contract defines 2 schemas that model the data carried by its messages. Each schema is shown below with its type and property counts.

SmartRestMessage
message
A SmartREST 2.0 line — comma-separated values prefixed with a numeric template ID.
ErrorMessage
message

Specification

The full machine-readable AsyncAPI contract behind this narrative.

Source

cumulocity-mqtt-asyncapi.yml Raw ↑

Other APIs Cumulocity publishes across the network.

Cumulocity MQTT Service 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#SmartREST#Device Integration#Telemetry
← Back to C APIs
API Details
ID
cumulocity:cumulocity-mqtt-api
Base URL
mqtt://{tenant}.cumulocity.com:1883
Docs
https://cumulocity.com/docs/device-integration/mqtt/
Provider
Cumulocity
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