Charles is a HTTP proxy that enables you to see traffic between your machine and the backend

Radically better observability stack

AI-powered end-to-end testing lets teams of all skill levels—whether they code or not—integrate functional, visual, and API testing to streamline critical test flows. Create, run, and maintain robust tests that validate more in less time.

Bugs. Happen. Debugging and Troubleshooting Reimagined

Professional software tool for HTTP testing and debugging

LangSmith Observability gives you complete visibility into agent behavior with tracing, real-time monitoring, alerting, and high-level insights into usage.