Method: projects.topics.publish

Adds one or more messages to the topic. Returns NOT_FOUND if the topic does not exist.

HTTP request


Path parameters

Parameters
topic

string

Required. The messages in the request will be published on this topic. Format is projects/{project}/topics/{topic}.

Request body

The request body contains data with the following structure:

JSON representation 
{
 "messages": [
 {
 object (PubsubMessage )
 }
 ]
}
Fields
messages[]

object (PubsubMessage )

Required. The messages to publish.

Response body

Response for the topics.publish method.

If successful, the response body contains data with the following structure:

JSON representation 
{
 "messageIds": [
 string
 ]
}
Fields
messageIds[]

string

Optional. The server-assigned ID of each published message, in the same order as the messages in the request. IDs are guaranteed to be unique within the topic.

Authorization scopes

Requires one of the following OAuth scopes:

  • https://www.googleapis.com/auth/pubsub
  • https://www.googleapis.com/auth/cloud-platform

For more information, see the Authentication Overview.

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Last updated 2025年08月22日 UTC.