HTTPDump - A simple, beautiful Webhook debugging tool.
Proxyman.io - Proxyman is a high-performance macOS app, which enables developers to view HTTP/HTTPS requests from apps and domains.
LightStep Sandbox - How quickly can you debug an error in a distributed system?
Proxy Manager for Google Chrome - Oxy Proxy Extension for Google Chrome: add and switch between multiple proxies, simple, one-click connection, works with any proxy provider of your choice.
Requestly - Debug & Modify network requests - loved by 100K+ web devs
Endpoints - View and respond to requests on an HTTP endpoint