API Guides

Curated lists to help you find the right API faster. Filter by auth type, security, and browser compatibility.

APIs That Require No Authentication

APIs you can call right now with zero setup — no API keys, no OAuth, no signup. Perfect for prototyping and learning.

APIs that support encrypted connections. Essential for production applications handling sensitive data.

APIs with CORS support that work directly from the browser. No proxy server needed — call them from your frontend.

APIs that use OAuth for secure, delegated access. Industry standard for user-authorized API access.

APIs that authenticate with a simple API key. Quick to set up — just sign up, get a key, and start calling.