The Most Complete Public APIs Directory in 2026 (1,555 APIs with Auth, SDKs & Rate Limits)

If you've ever built a side project, you know the drill: you have an idea, you start building, and then you spend 2-3 hours just searching for the right API . Is there a free weather API? Does it need an API key? What's the rate limit? Does it have a Python SDK? I got tired of that workflow. So I built a dataset. What I built A curated CSV with 1,555 public APIs across 52 categories , enriched with the information you actually need before integrating an API: Field Example Name OpenWeatherMap Cat