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.
AuthenticationAPI KeySign up with the provider to obtain credentials.
HTTPSSupportedTraffic is encrypted in transit.
CORSDisabledBrowser calls need a server-side proxy.
PricingFreeNo paid tier — free for the documented use case.
FormatsJSON, WebSocketResponses can be requested as JSON or WebSocket.
GreatAPIs Score
Score70
Authentication15/25API key required
Pricing20/20Free to use
Docs0/20No docs or spec available
Formats15/15Supports 2 response formats
Freshness20/20Verified within 6 months
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<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.
Stored keyNo key stored
Your key is stored only in this browser (localStorage) and sent directly to the API — never to greatapis.