Endpoints - View and respond to requests on an HTTP endpoint
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
HTTP Prompt - An interactive command-line HTTP client
code-ray - Live debugging tool for software developers
AskBlocker - Browser extensions that keep permission requests in check
Reactime - Time travel debugging tool, visualizing and tracing state