API Bouncer is a curated directory of 900+ free public APIs across 50+ categories. Whether you're a developer prototyping a new app, a student learning to code, or a hobbyist building something fun, we help you find the right API fast — with auth type, CORS support, and health status surfaced up front so you can pick wisely.
A public API (Application Programming Interface) is a free service that lets your code request data from another website — weather forecasts, stock prices, game stats, AI models, and much more. Most require no payment and many need no sign-up at all. Use the search page to filter by category and authentication type, browse the bouncing icons below, or jump into our beginner-friendly guides if you've never called an API before.
APIs last health-checked: Apr 1, 2026. Actively maintained and regularly updated.
Explore our full directory of free public APIs organized by category. Click any category to see all available APIs, or click an API name to visit it directly.
One of the largest directories of free public APIs, sourced and verified from the open-source community.
From weather and finance to AI and games — find APIs organized into easy-to-browse categories.
We regularly ping every API so you know which ones are actually online before you start building.
Step-by-step tutorials that teach you how to use APIs, from your first fetch() call to full projects.
API Bouncer exists to make free APIs easy to discover. Too many useful APIs sit buried in documentation pages or obscure GitHub repos. We aggregate them into one searchable, health-checked directory so developers at every level can find what they need and start building.
A curated list of free APIs organized by portfolio project type — weather dashboards, social feeds, e-commerce mockups, data visualizations, and AI-powered tools.
Learn how to use APIs securely from frontend code. Covers API key protection, proxy servers, HTTPS, token handling, input validation, and common mistakes to avoid.
A complete tutorial for building a weather dashboard with HTML, CSS, and JavaScript using the free Open-Meteo API. Includes geolocation, forecasts, and error handling.
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