Treblle

Treblle fills a gap that simple uptime monitors can't—it watches every API request in production. Drop their SDK into your backend and you get 40+ metrics per request: latency, errors, security risks, and performance insights, all without performance overhead. Treblle auto-masks sensitive data (passwords, tokens) and auto-generates API documentation as requests come in.\n\nFor indie hackers building APIs, Treblle's free tier offers meaningful monitoring depth that would cost thousands with Datadog. Security scoring for each endpoint alerts you to vulnerabilities before they become problems. The platform's focus on developer experience—simple SDK integration, clear dashboards, contextual debugging—makes it invaluable for solo developers shipping production APIs.