REST API GuideservicesCheck if service existsCheck if service exists HEAD /services/:ID Check if an service with ID exists, but do not return its data. Requires dev permission. Request Responses204304401404500Exists (No Content)Response HeadersETagEntity tag (RFC 7232)Last-ModifiedLast modification date and time (RFC 7231)Not ModifiedUnauthorizedResponse HeadersWWW-AuthenticatePreferred authentication scheme (RFC 7235)Not FoundRuntime Error (Internal Server Error)