Best Free APIs for Developers
Curated collection of 150+ high-reliability, zero-cost public REST APIs across 47 industries, complete with ready-to-use cURL, JS, and Python code snippets.
Overview & Comparison Matrix
314 Endpoints| API Name | Category | Auth Status | Rate Limit | Action |
|---|---|---|---|---|
| Open-Meteo | weather | No Key | Sınırsız | View API |
| OpenWeatherMap | weather | Free Key | 1000 çağrı/gün | View API |
| AirVisual | weather | Free Key | 10.000 istek/ay | View API |
| OpenAQ | weather | Free Key | 5000 istek/gün | View API |
| CoinGecko | crypto | No Key | 10-50 istek/dk | View API |
| CoinCap | crypto | No Key | 200 istek/dk | View API |
| CoinMarketCap | crypto | Free Key | 10.000 istek/ay | View API |
| CryptoCompare | crypto | Free Key | 100.000 istek/ay | View API |
| Binance API | crypto | No Key | 1200 istek/dk | View API |
| Etherscan | crypto | Free Key | 5 istek/sn | View API |
All Verified Endpoints(24 / 314)
Open-Meteo
Zero authentication required, completely free, 16-day forecast, unlimited requests
OpenWeatherMap
7-day weather forecast, current conditions, and historical records
AirVisual
Global real-time air quality index (AQI) and pollution sensor datasets
OpenAQ
Global community air quality open environmental data platform
CoinGecko
Zero authentication required, comprehensive crypto market datasets
CoinCap
Real-time crypto market cap, exchange volume, and live pricing feeds
CoinMarketCap
Industry-leading cryptocurrency index and market valuations
CryptoCompare
Comprehensive crypto market streaming and historical pricing analytics
Binance API
Official Binance spot, futures, and real-time market depth endpoints
Etherscan
Ethereum blockchain explorer, smart contract telemetry and gas tracker
Alchemy
Complete Web3 development suite and high-throughput RPC node infrastructure
Moralis
Enterprise Web3 APIs, NFT indexers, and cross-chain wallet data streaming
DeFi Llama
Open DeFi TVL protocol data and yield analytics, 100% free
OpenSea
NFT marketplace listings, bids, collection stats, and sales events
RAWG
Massive database of 500,000+ video games with metadata and player reviews
IGDB
Twitch video game database with cover artwork, genres, and ratings
CheapShark
Video game deal finder and digital store price comparison, zero auth
Free-to-Play Games
Categorized database of free-to-play MMO, RPG and action games
GamerPower
Real-time video game giveaways, promotions, and free DLC alerts
Steam API
Official Valve Steam user profiles, inventory, and game telemetry
Pokémon API
Complete Pokémon catalog, moves, abilities, species, and sprites
League of Legends (Riot)
Official Riot Games LoL match history, champions, and rankings
Valorant API
Valorant weapon skins, playable agents, maps, and battlepass tiers
Genshin Impact
Comprehensive Genshin Impact characters, weapons, and artifact stats
Frequently Asked Questions & Developer Guide
Are these APIs completely free for developers?
Yes, all endpoints included in this collection offer free tiers, zero-cost quotas, or open public data licenses without requiring paid subscriptions.
Which APIs do not require an API key?
Endpoints such as Open-Meteo, CoinPaprika, World Cities, and PokéAPI operate with Zero-Auth and can be invoked directly from code.
Can I use these in production or commercial apps?
Most providers permit commercial usage within fair-use quotas. Please review the official documentation link for specific SLA terms.
How do I bypass CORS restrictions?
Use FreeAPI Smart Edge Gateway to bypass browser CORS headers and inspect live responses with sub-2ms caching.