FundingPulse — Cross-Exchange Crypto Derivatives API

Real-time funding rates, open interest, long/short ratios, liquidations, and cross-exchange spread signals aggregated from up to 6 major exchanges — all through a single API.

A cost-effective alternative to CoinGlass ($29-699/mo) at a fraction of the price.

What data does FundingPulse provide?

FundingPulse collects and normalizes derivatives data from Bybit, Binance, OKX, Bitget, dYdX, and Hyperliquid every 60 seconds:

• Funding Rates — Current and annualized rates across all exchanges for 30 perpetual pairs
• Open Interest — Real-time OI in contracts and USD value
• Long/Short Ratios — Account-level long vs short positioning
• Liquidations — Recent liquidation events with size and direction
• Cross-Exchange Spreads — The killer feature: instantly see funding rate differences between exchanges for arbitrage
• Signals — Pre-built funding arbitrage opportunities and composite sentiment scores

Supported Exchanges

Exchange	Funding	Open Interest	Long/Short	Availability
OKX	Yes	Yes	Yes	All regions
Bitget	Yes	Yes	-	All regions
dYdX	Yes	Yes	-	All regions
Hyperliquid	Yes	Yes	-	All regions
Bybit	Yes	Yes	-	Region-dependent*
Binance	Yes	Yes	Yes	Region-dependent*

*Bybit and Binance apply geo-restrictions to their public APIs. Availability depends on the server region. When running on Apify (US servers), these exchanges may be unavailable. Self-hosted deployments from non-restricted regions will have full 6-exchange coverage.

API Endpoints

Core Data

• GET /api/funding-rates — Current rates across all exchanges
• GET /api/funding-rates/history — Historical rates (tier-gated)
• GET /api/open-interest — Current OI across exchanges
• GET /api/long-short-ratio — Aggregated L/S ratios
• GET /api/liquidations — Recent liquidations

Signals & Analytics

• GET /api/spreads — Cross-exchange funding rate spreads for arbitrage
• GET /api/signals/funding-arb — Arb opportunities where spread exceeds threshold
• GET /api/signals/sentiment — Composite sentiment score from funding + OI + L/S
• GET /api/overview — Dashboard view of top pairs with all metrics

Meta

• GET /api/health — Exchange status, cache stats, uptime
• GET /api/docs — Full API documentation

Query Parameters

All core endpoints support:

• symbol — Filter by canonical pair (e.g., BTC-USDT)
• exchange — Filter by exchange (e.g., binance, okx)

History endpoint additionally supports:

• from / to — Unix timestamp range
• limit — Max rows (default 100, max 1000)

Example Response

GET /api/funding-rates?symbol=BTC-USDT

{
  "success": true,
  "data": [
    {
      "symbol": "BTC-USDT",
      "exchange": "binance",
      "rate": 0.0001,
      "annualizedRate": 10.95,
      "nextFundingTime": 1700000000000,
      "markPrice": 67500.00,
      "indexPrice": 67510.00,
      "timestamp": 1699999000000
    },
    ...
  ],
  "meta": {
    "timestamp": 1699999500000,
    "exchanges": ["binance", "bybit", "okx", "bitget", "dydx", "hyperliquid"],
    "cached": true
  }
}

Pricing Tiers

Tier	Requests/day	Symbols	History	Signals
Free	100	Top 10	None	No
Basic	5,000	All 30	7 days	No
Pro	50,000	All 30	30 days	Yes
Ultra	Unlimited	All 30	Full	Yes

Use Cases

• Funding Rate Arbitrage — Identify spreads between exchanges where you can go long on one and short on another to capture the funding differential
• Sentiment Analysis — Track aggregate market positioning through funding rates, OI changes, and L/S ratios
• Risk Management — Monitor liquidation cascades and OI shifts in real-time
• Trading Bot Integration — Feed normalized multi-exchange data into your algo strategies
• Market Dashboards — Build derivatives dashboards with a single API call to /api/overview

Authentication

Pass your API key via the x-api-key header:

curl -H "x-api-key: YOUR_KEY" https://YOUR_STANDBY_URL/api/funding-rates

Technical Details

• Data refreshes every 60 seconds (funding rates, OI) and every 5 minutes (L/S ratios)
• Sub-millisecond response times via in-memory cache
• Historical data stored in SQLite with WAL mode
• All symbols normalized to canonical format (e.g., BTC-USDT)
• Resilient collection: one exchange failing doesn't affect others