# Free Crypto APIs

Page: https://free-web-services.com/web-services/unit-convertors/crypto/

Cryptocurrency prices and market data

## Services

| Service | API key | Formats | Free use |
|---|---|---|---|
| [Alchemy API](https://free-web-services.com/web-services/unit-convertors/crypto/alchemy-api.md) | Needed, free | JSON | Free with a free API key for 30 million compute units a month and 15 requests a second. |
| [Binance Market Data API](https://free-web-services.com/web-services/unit-convertors/crypto/binance-market-data-api.md) | Not needed | JSON | Free, no key needed, for public market data only. |
| [BlockCypher API](https://free-web-services.com/web-services/unit-convertors/crypto/blockcypher-api.md) | Not needed | JSON | Free, no key needed for read-only calls, up to 3 requests a second and 100 an hour. |
| [Blockscout API](https://free-web-services.com/web-services/unit-convertors/crypto/blockscout-api.md) | Needed, free | JSON | Free with a free API key. |
| [Coin Boss API](https://free-web-services.com/web-services/unit-convertors/crypto/coin-boss-api.md) | Not needed | JSON | The documented endpoints are currently free to use. |
| [CoinGecko API](https://free-web-services.com/web-services/unit-convertors/crypto/coingecko-api.md) | Not needed | JSON | The free Demo plan needs a free API key and has a monthly call limit; paid plans offer more calls and data. |
| [CoinLore API](https://free-web-services.com/web-services/unit-convertors/crypto/coinlore-api.md) | Not needed | JSON | Free, no key needed, with about one request per second recommended. |
| [CoinPaprika API](https://free-web-services.com/web-services/unit-convertors/crypto/coinpaprika-api.md) | Not needed | JSON | Free, no key needed, for personal use, up to 20,000 calls a month per IP address. |
| [Crypto Fear and Greed Index API](https://free-web-services.com/web-services/unit-convertors/crypto/crypto-fear-and-greed-index-api.md) | Not needed | JSON, CSV | Free, no key needed. |
| [DefiLlama API](https://free-web-services.com/web-services/unit-convertors/crypto/defillama-api.md) | Not needed | JSON | Free, no key needed for the public endpoints; a paid Pro key adds more endpoints. |
| [DEX Screener API](https://free-web-services.com/web-services/unit-convertors/crypto/dex-screener-api.md) | Not needed | JSON | Free, no key needed, with limits per endpoint such as 60 requests a minute. |
| [Etherscan API](https://free-web-services.com/web-services/unit-convertors/crypto/etherscan-api.md) | Needed, free | JSON | Free with a free API key for personal and research use, up to 3 calls a second and 100,000 a day on selected chains. |
| [Kraken Spot REST API (public market data)](https://free-web-services.com/web-services/unit-convertors/crypto/kraken-spot-rest-api.md) | Not needed | JSON | Free, no key needed for the public market data endpoints, within Kraken's rate limits. |
| [mempool.space API](https://free-web-services.com/web-services/unit-convertors/crypto/mempool-space-api.md) | Not needed | JSON | Free, no key needed, with rate limits that answer HTTP 429 when exceeded. |

## Questions

**Which free crypto APIs work without an API key?**  
Binance Market Data API, BlockCypher API, Coin Boss API, CoinGecko API, CoinLore API, CoinPaprika API, Crypto Fear and Greed Index API, DefiLlama API, DEX Screener API, Kraken Spot REST API (public market data) and mempool.space API work without a key, according to their documentation. Most keyless services ask you to keep the number of requests reasonable, and some ask for a User-Agent that names your app.

**Are these crypto APIs really free?**  
The services here can be used without paying, at least on a free plan or free tier, often with limits such as a number of requests per day or non-commercial use only. The table above quotes what each service says about its free use; check the provider's own terms before you rely on it.

**How up to date is this list?**  
The address of every service is checked about once a week, and services that stop working or stop being free are removed. This list last changed on November 9th, 2026.