In my attempts to integrate with a third party application, I need to set up a scripted REST API to handle a webhook. I've got no problems implementing the scripted REST API's, my issue is when registering the webhook URL with the third party service they send a HEAD method request before allowing the webhook to be created. Scripted REST API's in ServiceNow only allow GET, POST, PUSH, PATCH and DELETE.
I've tried adding a new choice to the HTTP method but this still returns a 405 error (Method not allowed).
Interestingly, the response body is also empty. If I test the Scripted REST API with a GET method (which is not implemented) I get a body with the not implemented error in it. So ServiceNow appears to be completely ignoring HEAD requests.
