"XMLHttpRequest Tracing" for AJAX debugging 10 May 2005 Here's a Greasemonkey user script to trace XMLHttpRequest calls in the javascript console. It logs the "open" and "send" calls, as well as the response status code and text. Its purpose is to help peek into AJAX applications, to learning or troubleshooting, without having to run a network sniffer. This screenshot shows a sample output (Google