This allows you to authenticate that your endpoint was triggered by a trusted source (i.e. Similarweb).

200: Ok → Authentication succeeded; your webhook was triggered by Similarweb.
406: NotAcceptable → Authentication failed; your webhook was not triggered by Similarweb.
424: Failed Dependency → Authentication failed. Your webhook was triggered by Similarweb but the authorization token expired. This means that more than 5 minutes have passed since the trigger.