Cryptocurrency Prices, Charts And Market Capitalizations | CoinMarketCap
Top cryptocurrency prices and charts, listed by market capitalization. Free access to current and historic data for Bitcoin and thousands of altcoins.
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# CoinMarketCap API Documentation
> CoinMarketCap is the most-referenced source of cryptocurrency market data: real-time and historical prices, market cap, OHLCV, exchange and on-chain DEX data, and CMC's proprietary indices (Fear & Greed, CMC100, CMC20, Altcoin Season).
>
> **No API key required to start.** Call the [Keyless Public API](https://pro.coinmarketcap.com/api/documentation/pro-api-reference/keyless-public-api.md) with no key and no signup - just prefix any supported path with `/public-api`, e.g. `https://pro-api.coinmarketcap.com/public-api/v1/simple/price?ids=1,1027&convert=USD`. Add a free API key for higher rate limits and the full endpoint catalog.
## Documentation
- [/internals/AI_FRIENDLY_CHANGELOG](https://pro.coinmarketcap.com/api/documentation/internals/AI_FRIENDLY_CHANGELOG.md)
- [Standards and Conventions](https://pro.coinmarketcap.com/api/documentation/guides/standards-and-conventions.md): Understand response structure, identifier conventions, request bundling, date formats, and versioning.
- [Get Started with an API Key](https://pro.coinmarketcap.com/api/documentation/guides/quick-start.md): Get your CoinMarketCap API key, make your first production request, and find the right next step.
- [Get Top Coins by Market Cap with the CoinMarketCap API](https://pro.coinmarketcap.com/api/documentation/guides/get-top-coins-by-market-cap.md): Use the CoinMarketCap listings endpoint for ranked market views and paginated market slices.
- [Get Latest Crypto Prices with the CoinMarketCap API](https://pro.coinmarketcap.com/api/documentation/guides/get-latest-crypto-prices.md): Use the CoinMarketCap quotes endpoint when you already know which assets you want prices for.
- [Get Historical Price Data with the CoinMarketCap API](https://pro.coinmarketcap.com/api/documentation/guides/get-historical-price-data.md): Choose the right CoinMarketCap endpoint for historical quotes and OHLCV candlestick data.
- [Rate limits and troubleshooting](https://pro.coinmarke