Solved: Inherited a legacy project with zero API docs any fast way to map all endpoints?

🚀 Executive Summary TL;DR: Inheriting a legacy API with zero documentation poses significant risks, as critical services can depend on unknown endpoints. This guide provides three battle-tested methods—log diving, code analysis, and proxy-based reverse-engineering—to quickly map all API endpoints and regain control of the system. 🎯 Key Takeaways Web server access logs (e.g., Nginx, Apache) are a quick and reliable source for identifying actively used API endpoints and their frequency in production. Analyzing framework-specific routing files (e.g., config/routes.rb for Rails, urls.py for Django) provides the definitive list of all defined endpoints and can be used to generate OpenAPI specifications. Man-in-the-middle proxies like mitmproxy or Charles Proxy can capture complete request/response details, including headers and payloads, crucial for understanding undocumented data contracts in staging environments. Inherited a legacy API with zero documentation? Discover three battle-tested