Webhook Tester : Webhook Tester allows you to easily test webhooks and other types of HTTP requests.
patchbay : patchbay.pub is a free web service you can use to implement things like static site hosting, file sharing, cross-platform notifications, webhooks hand...
Requestdiff : Differentiate HTTP headers and content body of two GET URLs.
htty : htty is a console application for interacting with web servers. It’s a fun way to explore web APIs and to learn the ins and outs of HTTP.
wuzz : Interactive cli tool for HTTP inspection
Wuzz command line arguments are similar to cURL's arguments, so it can be used to inspect/modify requests cop...
RequestBin gives you a URL that will collect requests made to it and let you inspect them in a human-friendly way.
Use RequestBin to see what your HTTP client is sending or to inspect and debug webhook requests.