# Coin Boss API

Category: [Finance](https://free-web-services.com/web-services/unit-convertors/fiinance/)  
Page: https://free-web-services.com/web-services/unit-convertors/fiinance/coin-boss-api.html  
Documentation: https://www.coinboss.com/api-docs

Coin Boss is a free public REST API for real-time crypto derivatives market data. Developers call the documented endpoints (anonymous use needs no key) and get JSON for liquidations, open interest, funding rates, long/short ratios, volumes, options, exchange data, and ETF flows. Public documentation is in English and covers the core endpoints. Analytics for traders and developers. Not a brokerage, exchange, or gambling product. The documented endpoints are currently free to use.

- API key: Not needed
- Pricing: The documented endpoints are currently free to use.
- From the browser: Yes (CORS)
- Formats: JSON
- Interface: REST
- Provider: coinboss.com
- Last checked: Working on November 1st, 2026

Example request:

```sh
curl 'https://api.coinboss.com/api/liquidations/overview'
```

The JavaScript works in a web page as well as in Node.js 18 or newer.