What is Charles Proxy and what is it used for?

Charles Proxy is a tool for intercepting, analyzing, and debugging HTTP/HTTPS network traffic between a client and a server. It functions as a proxy server, allowing you to see all requests and responses passing through it.

Main uses of Charles Proxy:

• Debugging API requests: viewing headers, request and response bodies.
• Testing mobile applications and websites, especially when you need to verify what exactly is sent and received over the network.
• Modifying requests and responses for testing various scenarios.
• Recording and replaying network traffic.

Example of use: a QA engineer can set up Charles Proxy on their computer and connect a mobile device to it to track what requests the application sends, verify data correctness, and response times.