The HTTP Request action for Workflows enables you to issue an HTTP request to any API.
To create HTTP Request action
Select a Method.
Enter the URL.
Turn on Authentication if your request destination requires authentication. Any basic or token-based credential with the scope AppEngine that is permitted to be used by the Workflows app is supported. For more information on the credential vault, see Credential vault
Enter the Payload.
Enter the Headers.
Turn on Error handling for enabling to Fail on certain HTTP response codes.