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

A browser extension and Ruby gem to improve the debugging experience when testing Rails applications

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

Next-gen browser to build, test & debug mobile websites.

Datadog is a cloud-based monitoring and analytics platform that provides observability and security for cloud-scale applications

Skyramp uses deterministic, local-first AI to generate functional & performance tests — with native support for your frameworks, infra-aware execution, and seamless pipeline integration.