Optional HTTP headers to add to REST requests. Header values can come from a stored secret value or from a Jenkins Secret text credential. Custom headers are applied after the default headers, so a custom header with the same name replaces the default value.

Test Configuration sends these headers exactly as a build would, including rows that are not saved yet. The REST Endpoint field check does not send them, so a 401 or 403 there is only a warning; use Test Configuration to verify endpoints that need custom headers.