Cryptocurrency APIs deliver exchange rates, order books, portfolio tracking, and blockchain data across hundreds of exchanges. Public market-data endpoints (CoinGecko, CoinCap) are free with per-minute caps; trading and node-infrastructure APIs operate on usage-based pricing. Always check whether an endpoint needs read-only keys before wiring it into production code.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| 0x API API for querying token and pool stats across various liquidity pools | Paid | Unknown | Yes | Profile | |
| 1inch API API for querying decentralize exchange | Paid | Unknown | Unknown | Profile | |
| AWS QLDB API Official AWS QLDB service API exposed through AWS SDKs and service API references. | Paid | API Key | Yes | Profile | |
| Alpha (Mossland) API Korean crypto channel stance + RAG Q&A + canonical entity/topic/event store | Paid | Unknown | Yes | Profile | |
| Binance Cryptocurrency exchange API for spot and futures trading, market data, and account management | Free | API Key | No | Profile | |
| Bitcambio API Get the list of all traded assets in the exchange | Unknown | Unknown | Unknown | Profile | |
| BitcoinCharts API Financial and Technical Data related to the Bitcoin Network | Unknown | Unknown | Unknown | Profile | |
| Bitfinex Cryptocurrency exchange API for spot and derivatives trading with market data | Free | API Key | No | Profile | |
| Bitmex Cryptocurrency derivatives exchange API for futures and perpetual contracts trading | Free | API Key | No | Profile | |
| Block Bitcoin blockchain API for wallet management, payment processing, and transaction data | Freemium | API Key | No | Profile | |
| BlockBee Cryptocurrency payment processing API for accepting Bitcoin and other crypto payments | Freemium | API Key | No | Profile | |
| Blockchain Bitcoin blockchain API for wallet management, payment processing, and transaction data | Free | API Key | No | Profile | |
| Brave New Coin Cryptocurrency market data API providing real-time and historical prices from 200+ exchanges | Freemium | API Key | Yes | Profile | |
| BtcTurk Real-time cryptocurrency data, graphs and API that allows buy&sell | Free | API Key | No | Profile | |
| Bybit Cryptocurrency exchange API for spot and derivatives trading, market data, and account management | Free | API Key | Yes | Profile | |
| CoinAPI Cryptocurrency data API providing real-time and historical prices from 200+ exchanges | Freemium | API Key | No | Profile | |
| CoinCap Real-time cryptocurrency market data API providing prices, volume, and market cap for digital assets | Free | No | No | Profile | |
| CoinDCX Cryptocurrency Trading Platform | Free | API Key | No | Profile | |
| CoinGecko Cryptocurrency market data API providing prices, volume, market cap, and developer/social metrics for thousands of coins | Freemium | No | No | Profile | |
| CoinMarketCap Cryptocurrency market data API providing prices, volume, market cap, and rankings for thousands of cryptocurrencies | Freemium | API Key | No | Profile | |
| CoinRanking Cryptocurrency market data API providing real-time prices, volume, market cap, and coin rankings | Freemium | API Key | No | Profile | |
| Coinbase Cryptocurrency exchange API for buying, selling, and managing Bitcoin, Ethereum, and other digital assets | Free | API Key | No | Profile | |
| Coinbase Advanced Trade Cryptocurrency exchange API for trading, market data, and portfolio management on Coinbase | Free | API Key | No | Profile | |
| Coinigy Interacting with Coinigy Accounts and Exchange Directly | Paid | API Key | Unknown | Profile | |
| Coinlayer API Real-time Crypto Currency Exchange Rates | Paid | API Key | Unknown | Profile | |
| Coinlib Crypto Currency Prices | Freemium | API Key | Yes | Profile | |
| Coinlore Cryptocurrency market data API providing prices, volume, market cap, and exchange data | Free | No | No | Profile | |
| Coinpaprika Cryptocurrency market data API providing prices, volume, market cap, exchanges, and coin metadata | Freemium | No | No | Profile | |
| Coinremitter Cryptocurrency payment gateway API for accepting Bitcoin and altcoin payments | Freemium | API Key | No | Profile | |
| CryptAPI Cryptocurrency payment processing API for accepting Bitcoin and altcoin payments | Freemium | No | No | Profile | |
| CryptoCompare Cryptocurrency data API providing prices, historical data, news, and social metrics for thousands of coins | Freemium | No | No | Profile | |
| EXMO Cryptocurrencies exchange based in UK | Free | API Key | No | Profile | |
| Ethplorer Ethereum blockchain explorer API for token data, balances, addresses, and transaction history | Freemium | API Key | No | Profile | |
| Gateio Cryptocurrency exchange API for spot, margin, and futures trading with market data | Free | API Key | No | Profile | |
| Gemini Cryptocurrency exchange API for trading, custody, and market data | Free | No | No | Profile | |
| HTX Cryptocurrency exchange API for spot and futures trading, market data, and account management | Free | API Key | Yes | Profile | |
| Indodax Trade your Bitcoin and other assets with rupiah | Free | API Key | No | Profile | |
| Kraken Cryptocurrency exchange API for spot and futures trading, staking, and market data | Free | API Key | No | Profile | |
| KuCoin Cryptocurrency exchange API for spot and futures trading, margin, and market data | Free | API Key | No | Profile | |
| Mempool Bitcoin blockchain API for mempool data, transaction fees, and network status monitoring | Free | No | Unknown | Profile | |
| MercadoBitcoin Brazilian Cryptocurrency Information | Free | No | Yes | Profile | |
| Messari Cryptocurrency data API providing metrics, news, and research for crypto assets and protocols | Paid | No | No | Profile | |
| Neblio REST API Suite API APIs for Interacting with NTP1 Tokens & The Neblio Blockchain | Unknown | API Key | Yes | Profile | |
| Nexchange Automated cryptocurrency exchange service | Free | No | Unknown | Profile | |
| NovaDax NovaDAX API to access all market data, trading management endpoints | Free | API Key | No | Profile | |
| OKX Cryptocurrency exchange API for spot, margin, and futures trading, market data, and account management | Free | API Key | No | Profile | |
| OpenSea NFT marketplace API for discovering, listing, and trading non-fungible tokens across multiple blockchains | Free | API Key | No | Profile | |
| Poloniex Cryptocurrency exchange API for spot and margin trading with market data | Free | API Key | Yes | Profile | |
| VALR Cryptocurrency Exchange based in South Africa | Free | API Key | Yes | Profile | |
| WorldCoinIndex Cryptocurrencies Prices | Freemium | API Key | Yes | Profile | |
| dYdX Decentralized cryptocurrency exchange API for perpetual contracts trading on Ethereum L2 | Free | API Key | Yes | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.