> ## Documentation Index
> Fetch the complete documentation index at: https://docs.blinkops.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List Topics

Lists topics by the project's name.

<Note>
  External Documentation

  To learn more, visit the [Pub-Sub documentation](https://cloud.google.com/pubsub/docs/reference/rest/v1/projects.topics/list).
</Note>

## Basic Parameters

<div className="integrations-table">
  | Parameter  | Description            |
  | ---------- | ---------------------- |
  | Project ID | The ID of the project. |
</div>

## Advanced Parameters

<div className="integrations-table">
  | Parameter  | Description                                                                                                                                                                            |
  | ---------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | Page Size  | Maximum number of topics to return.                                                                                                                                                    |
  | Page Token | The `nextPageToken` value returned by the last `List Topics` action. Indicates that this is a continuation of the prior call, and that the system should return the next page of data. |
</div>

## Example Output

```json theme={"dark"}
{
  "topics": [
    {
      object (Topic)
    }
  ],
  "nextPageToken": string
}
```

## Workflow Library Example

[List Topics with Pub Sub and Send Results Via Email](https://library.blinkops.com/workflows/list-topics-with-pub-sub-and-send-results-via-email)

<div className="iframe-wrapper">
  <div className="iframe-media">
    <img src="https://mintcdn.com/blinkops-2/ojHYuDeYX5FWuN8a/img/Icons/play-box.svg?fit=max&auto=format&n=ojHYuDeYX5FWuN8a&q=85&s=b8af968e71438a9499c3223c9bd29fb2" alt="Workflow Library" width="16" height="16" data-path="img/Icons/play-box.svg" />

    Preview this Workflow on desktop
  </div>

  <iframe className="iframe" src="https://library.blinkops.com/workflows/list-topics-with-pub-sub-and-send-results-via-email/canvas" />
</div>