Hi Omar, Thanks for the observation. It seems that the HTTP message is now ignored by Jetty (presumably version 12?). It has been marked as deprecated for some time [1], which is why we it will now be removed it from BaseX as well [2]. If you want to send a custom message, the official recommendation is to send it in the body of the response. Hope this helps, Christian [1] https://jakarta.ee/specifications/platform/9/apidocs/jakarta/servlet/http/ht... [2] https://docs.basex.org/13/Web_Functions#web:response-header ________________________________________ Von: Omar Siam via BaseX-Talk <basex-talk@mailman.uni-konstanz.de> Gesendet: Freitag, 17. April 2026 18:07 An: BaseX Betreff: [basex-talk] Can not set HTTP status message in response anymore comparing 10.6 to 12.3 Hi list, I just started to update my error reporting library [1] to 12 and XQuery 4.0. This used HTTP messages in previous versions to report the exact kind of problem the server encountert. It relies on this snippet working: declare %rest:path("response_message") function api:response_message() { (web:response-header( {}, { 'Cache-Control': 'max-age=3600,public' }, { 'status': 200, 'message': '*Something else*' } ), "Something else") }; To my surprise this does not show "Something else" as the HTTP status message. curl -i http://localhost:8984/response_message HTTP/1.1 200 *OK* Server: Jetty(12.1.8) Date: Fri, 17 Apr 2026 15:45:09 GMT Cache-Control: max-age=3600,public Content-Type: application/xml; charset=UTF-8 Server-Timing: parse;dur=5.49 ms,compile;dur=0.68 ms,optimize;dur=0.01 ms,evaluate;dur=0.00 ms,serialize;dur=0.00 ms Content-Length: 14 Something else As setting the HTTP status message to anything is a rather obscure feature, I would say updating the docs and stating, that this no longer works would "solve" this error. The last version I tested this with and it worked is 10.6 (probably any version running in Jetty 9.4). BaseX 12.3 [HTTP Server] [main] INFO org.eclipse.jetty.server.Server - jetty-12.1.8; built: 2026-04-01T01:09:18.991Z; git: c9cdc9aaa434a3665b8a53b4d1cc3684992da649; jvm 17.0.18+8-LTS [main] INFO org.eclipse.jetty.ee9.webapp.StandardDescriptorProcessor - NO JSP Support for /, did not find org.eclipse.jetty.ee9.jsp.JettyJspServlet [main] INFO org.eclipse.jetty.session.DefaultSessionIdManager - Session workerName=node0 Server was started (port: 1984). [main] INFO org.eclipse.jetty.server.handler.ContextHandler - Started oeje9n.ContextHandler$CoreContextHandler@3543df7d{BaseX: The XML Database and XQuery Processor,/,b=file:///V:/basexapiproblem/webapp/,a=AVAILABLE,h=oeje9n.ContextHandler$CoreContextHandler$CoreToNestedHandler@7c541c15{STARTED}} [main] INFO org.eclipse.jetty.server.AbstractConnector - Started oejs.ServerConnector@7af30760{HTTP/1.1, (http/1.1)}{0.0.0.0:8984} [main] INFO org.eclipse.jetty.server.Server - Started oejs.Server@758c83d8{STARTING}[12.1.8,sto=0] @435ms HTTP STOP Server was started (port: 8081). HTTP Server was started (port: 8984). Best regards [1] https://github.com/acdh-oeaw/api-problem4restxq -- Mag. Ing. Omar Siam Austrian Center for Digital Humanities Österreichische Akademie der Wissenschaften | Austrian Academy of Sciences Stellvertretende Behindertenvertrauensperson | Deputy representative for disabled persons Bäckerstraße 13, 1010 Wien, Österreich | Vienna, Austria T: +43 1 51581-7295 omar.siam@oeaw.ac.at | www.oeaw.ac.at/acdh