IoT Core Broker Service, gRPC: BrokerDataService.Publish

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Updated at July 1, 2026

Publishes message on behalf of specified broker

gRPC request

{
  "broker_id": "string",
  "topic": "string",
  "data": "bytes"
}

Field	Description
broker_id	string Required field. ID of broker publishing message The maximum string length in characters is 50.
topic	string Required field. Topic where message should be published The maximum string length in characters is 1024.
data	bytes Content of the message The maximum string length in characters is 262144.

{}

Field	Description
Empty