Free Cryptocurrency APIs

1inch is a decentralized exchange (DEX) aggregator that finds the best swap routes across protocols like Uniswap, SushiSwap, and Curve.

Bitcambio is a Brazilian cryptocurrency exchange that exposes a public REST API to retrieve all currently traded asset pairs and their market data.

BitcoinCharts provides financial and technical data about the Bitcoin network, including historical market data from dozens of exchanges worldwide.

CoinCap delivers real-time cryptocurrency prices and market data for thousands of assets through a straightforward REST API.

Coinlore offers a free, no-key-required API that returns price, volume, market cap, and ranking data for over 10,000 cryptocurrencies.

Coinpaprika offers a free, open cryptocurrency data API covering 2,500+ coins with prices, market stats, exchange data, and detailed coin metadata including team and investor information.

CoinStats is a no-authentication REST API that provides real-time prices, percentage changes, and basic market metrics for thousands of cryptocurrencies.

CryptAPI is a no-key cryptocurrency payment processor API that generates unique deposit addresses and watches for on-chain payments using a simple webhook callback URL.

CryptoCompare (now served via the CoinDesk Data API) provides one of the most comprehensive free cryptocurrency datasets, including multi-exchange price aggregates, OHLCV historical candles, orderbook depth, and social sentiment signals.

Gemini is a U.S.-regulated cryptocurrency exchange API that provides public market data without authentication, making it beginner-friendly.

Mempool.space is a Bitcoin blockchain explorer API that focuses on real-time transaction fee estimation and mempool (pending transaction pool) analytics.

MercadoBitcoin is Brazil's largest cryptocurrency exchange and offers a public API for retrieving real-time and historical market data for Bitcoin, Ethereum, Litecoin, and other coins traded on the platform.

Messari provides comprehensive data on thousands of cryptocurrency assets, including prices, market caps, and on-chain metrics.

Nexchange is an automated cryptocurrency exchange service API that lets you programmatically create and track currency swap orders.

The Solana JSON RPC API allows developers to interact directly with the Solana blockchain to read account balances, submit transactions, and query on-chain data.

ZMOK provides Ethereum JSON-RPC API access and Web3 provider services, allowing developers to interact with the Ethereum blockchain without running their own node.