Treblle

Treblle adds a small piece of code to your API and then watches the requests and responses. From that traffic it builds live documentation, shows errors and performance, and grades each endpoint on things like speed, security and design quality. Its AI features help explain problems, suggest fixes and answer questions about how your API behaves. Because the docs come from real use, they are less likely to be stale than ones written by hand. Treblle has a free plan and paid tiers for more requests and team features. It is a good match for teams that ship APIs quickly and want visibility without building their own dashboards.