You can use this endpoint to trigger a webhook event called repository_dispatch when you want activity that happens outside of GitHub to trigger a GitHub Actions workflow or GitHub App webhook. You must configure your GitHub Actions workflow or GitHub App to run when the repository_dispatch event occurs. For an example repository_dispatch webhook payload, see "RepositoryDispatchEvent."

The client_payload parameter is available for any extra information that your workflow might need. This parameter is a JSON payload that will be passed on when the webhook event is dispatched. For example, the client_payload can include a message that a user would like to send using a GitHub Actions workflow. Or the client_payload can be used as a test to debug your workflow.

This endpoint requires write access to the repository by providing either:

• Personal access tokens with repo scope. For more information, see "Creating a personal access token for the command line" in the GitHub Help documentation.
• GitHub Apps with both metadata:read and contents:read&write permissions.

This input example shows how you can use the client_payload as a test to debug your workflow.
Create a repository dispatch event