💻
Best Public APIs 2026
Discover directories and resources for finding public APIs — free and paid web services that expose data and functionality for developers to build on. These resources help developers find the right API for their projects. Compare discovery features, API documentation quality ratings, authentication type filtering, and whether SDKs are available for your programming language.
.svg)
Best Public APIs 2026 - Frequently Asked Questions
Where can I find free public APIs to build with?▾
Public APIs (github.com/public-apis/public-apis) is the most comprehensive open-source list of free APIs. RapidAPI is the largest API marketplace with both free and paid tiers. APIList.fun and any-api.com curate categorized API directories. For data APIs specifically, Data.gov and World Bank Open Data provide free government and international datasets.
What is the difference between REST and GraphQL APIs?▾
REST APIs have fixed endpoints that return predefined data structures — simple, widely supported, and cacheable. GraphQL APIs have a single endpoint where you specify exactly what data fields you need — reducing over-fetching, enabling complex nested queries in one request, and making schema exploration easy. REST is more common; GraphQL is preferred when frontend teams need flexible data fetching.
How do I authenticate with APIs that require API keys?▾
Store API keys in environment variables (never in source code). Pass them in request headers (Authorization: Bearer {key}) or as query parameters (as the API documentation specifies). Use a secrets management service (.env locally, Vault or AWS Secrets Manager in production) to keep keys out of version control. Rotate keys periodically and immediately if exposed.