---
title: Publish to Pub/Sub
sidebar:
  label: Publish
  order: 1
---
import SchemaInfo from '../../../../components/SchemaInfo.astro';

This processor will publish the incoming payload to a module that implements the `PubSubModule` interface.
This processor will return an error if any of the required parameters are missing or if the parameters are of the wrong type.
The payload is unchanged so whatever is received by this payload is output unless any errors are encountered.

<SchemaInfo type="processor" id="pubsub.publish"/>

### Example

```yaml
- id: publish
  type: pubsub.publish
  params:
    module: mqtt-out
    topic: "test"
```