Cryptocurrency — entry 007 of 53
Bitfinex
Bitfinex, operated by iFinex (the same corporate family behind Tether), splits its documentation into public REST/WebSocket market-data endpoints and authenticated trading endpoints that require an API key and secret with HMAC-SHA256 request signing. Access is free beyond standard trading fees, with connection-count rate limits governing heavy usage rather than tiered pricing.
GreatAPIs Score
Embed this badge
<a href="https://greatapis.com/api/bitfinex/"><img src="https://greatapis.com/badge/bitfinex.svg" alt="Scored 70 on greatapis.com"></a>Auth quickstart
- Sign up with the provider to get an API key.
- Send it on every request as a header
Authorization: <key> - The exact header isn't documented — Authorization is a common default; confirm in the provider's docs.
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.
Developer reference
REST API: 10-90 requests/minute depending on endpoint (e.g. /ticker); IP blocked 60s if exceeded. WebSocket: max 5 authenticated connections per 15s (wss://api.bitfinex.com), 20 public connections/minute (wss://api-pub.bitfinex.com), 25 channels/connection