HTTPBin
Free HTTP request and response debugging service. See exactly what your HTTP client sends - headers, IP, form data, JSON, and more. No API key needed.
Browse our collection of free developer-tools APIs. Each API includes detailed documentation, example requests, and usage guides. Click on any API to learn more.
npm Registry
Free API to query the npm package registry. Get package metadata, versions, dependencies, downloads, and maintainers. No API key needed.