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Bitfinex API

Bitfinex API

UpFreefinancial

Bitfinex API is the programmatic interface of veteran crypto exchange Bitfinex — spot, margin trading, derivatives, and unique funding (lending market) feature.

Visit site ↗Documentation ↗Health checked 9h ago
Use it when

Extremely deep BTC historical data (since 2013)

Watch for

Associated with Tether (USDT issuer), raising regulatory concerns

First check

Create API key in Bitfinex account. GET https://api-pub.bitfinex.com/v2/ticker/tBTCUSD for BTC/USD ticker.

Auth
api_key
CORS
?
HTTPS
Yes
Signup
?
Latency
398 ms
Protocol
REST, WebSocket
Pricing
free

Uptime · 30-day window

Probes: 1Uptime: 100%Avg latency: 398ms
01

About this API

Bitfinex is a crypto exchange founded 2012 in Hong Kong, one of the highest-volume exchanges globally in the mid-2010s. Differentiated by Funding market — other exchanges do margin trading by borrowing from exchange liquidity pools; Bitfinex lets users lend to each other (lend USD to earn interest, borrowers pay interest), forming a unique "crypto money market". BTC historical data back to 2013 is unmatched by other old exchanges. But Bitfinex has had controversy: hacked for 120k BTC in 2016 (worth $70M then, mostly recovered by US DOJ in 2022), shared management with Tether (USDT stablecoin issuer) raising regulatory concerns (NYAG 2019 investigation). Still a choice for professional traders today, but compliance controversies affect mainstream adoption.

02

What you can build

  • 1Professional margin trading
  • 2Funding market lending USD for yield
  • 3Deep historical BTC backtesting
  • 4Institutional trading
03

Strengths & limitations

Strengths

  • Extremely deep BTC historical data (since 2013)
  • Unique Funding market (users lend to each other with interest)
  • Preferred by professional traders

Limitations

  • Associated with Tether (USDT issuer), raising regulatory concerns
  • Hacked for 120k BTC in 2016
  • US customers restricted
04

Example request

Generic template — replace <endpoint> with the real path from the docs.
curl https://www.bitfinex.com/<endpoint> \
  -H "Authorization: Bearer $API_KEY"
# Some providers use X-Api-Key instead — verify in the docs.
05

Getting started

Create API key in Bitfinex account. GET https://api-pub.bitfinex.com/v2/ticker/tBTCUSD for BTC/USD ticker.

06

FAQ

How do I participate in the Funding market?+

Subscribe to funding orderbook via WebSocket to see USD lending supply/demand. Lenders post N% annualized rate orders; borrowers accept.

07

Technical details

CORS: ?HTTPS: YesSignup: ?Open source: No
Auth type
api_key
Pricing
free
Rate limit
90 req/分；WebSocket 几乎无限
Protocols
REST, WebSocket
SDKs
python, javascript, go, java
Response time
398 ms
Last health check
5/12/2026, 7:37:09 AM
08

Tags

cryptobitfinexexchangemarginfunding