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FundingFeed — Cross-Exchange Perpetual Funding Rate Aggregator
x402
FundingFeed — Cross-Exchange Perpetual Funding Rate Aggregator is a paid API for AI agents from funding-feed.kaminariouji.workers.dev, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-02).
Aggregates live perpetual futures funding rates, open interest, and best bid/ask across 10+ major crypto exchanges (OKX, Bybit, Gate.io, HTX, Hyperliquid, BingX, Bitget, Kraken, Coinbase, MEXC) for BTC, ETH, or SOL into a single call
Price / call$0.005
Success—
StatusUnknown
How this service works
Cross-exchange perpetual funding rate arbitrage, open interest, and best-execution for BTC/ETH/SOL. Aggregates live perpetual venues (OKX, Bybit, Gate.io, HTX, Hyperliquid, BingX, Bitget, Kraken, Coinbase, MEXC) into one call: current funding rate per venue, min/max/mean annualized funding, the cross-venue funding arbitrage spread, next funding time per venue, total open interest in USD with a per-venue breakdown, and real top-of-book best bid/ask. Use it to find the best funding rate arbitrage opportunity across exchanges, compare funding rates between Bybit and OKX for a specific coin, check annualized carry cost for a long/short funding arb, identify which exchange has the most negative funding rate right now, scan for cross-venue funding divergences in crypto perpetuals, monitor funding spreads to time a cash-and-carry strategy, detect crowded positioning from open interest, and route orders to the venue with the best price. Paid per call: 0.005 USDC on Base, Polygon, Solana or Tempo (MPP, no gas). FIRST CALL FREE per wallet — send header "X-WALLET: 0x<your Base address>" and get the full feed with no payment. Try it before you pay.
Output
Returns a JSON object with: the queried symbol, aggregated funding data (count of venues, per-exchange annualized funding rate and next funding timestamp, min/max/mean annualized percentages, cross-venue arb spread %), total and per-venue open interest in USD, best execution data (per-venue top-of-book bid/ask/last, overall best bid and best ask with exchange attribution, spread %), number of exchanges queried and responding, and a generation timestamp. All funding rates are expressed as annualized percentages for easy comparison.
Example use cases
Cash-and-carry arbitrage sizing
“I'm planning a BTC cash-and-carry trade — can you pull the current annualized funding rates across all venues for BTCUSDT and tell me the cross-exchange arb spread so I can figure out my carry yield?”
Crowded positioning detection
“I want to check if BTC longs are getting crowded — show me total open interest in USD across OKX, Bybit, and the other major perp venues and break it down by exchange.”
Best execution venue routing
“Before I enter a large ETH perpetual position, find me the best bid and ask across all venues right now so I know where to route the order for the tightest spread.”
Technical details
Endpoint
POSThttps://funding-feed.kaminariouji.workers.dev/funding-rate?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a unified, cross-exchange view of perpetual funding rates, open interest, and top-of-book prices in a single API call rather than querying each exchange individually. It is ideal for funding rate arbitrage research, carry trade sizing, crowding detection, and order routing decisions for BTC, ETH, or SOL. Prefer it over building your own aggregation when you need annualized rate normalization, arb-spread calculation, and best-execution routing pre-computed together.
Side effects
- One or more exchanges may be down or rate-limited, reducing exchangesOk count below exchangesQueried
- Symbol not supported (only BTC/ETH/SOL perpetuals covered)
- Stale data if upstream exchange APIs are slow — check generatedAt timestamp
- Payment of 0.005 USDC required per call via x402 protocol; missing payment returns 402
- Partial response if some venues fail mid-aggregation — byExchange arrays may have fewer entries than expected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"note": "Aggregated from public REST APIs. Not financial advice. Verify independently.",
"symbol": "BTCUSDT",
"funding": {
"count": 5,
"byExchange": [
{
"exchange": "okx",
"annualizedPct": 10.6,
"nextFundingAt": "2026-09-21T08:00:00.000Z"
}
],
"arbSpreadPct": 7.23,
"maxAnnualizedPct": 10.95,
"minAnnualizedPct": 3.72,
"meanAnnualizedPct": 6.83
},
"exchangesOk": 7,
"generatedAt": "2026-09-21T00:00:00.000Z",
"openInterest": {
"count": 5,
"meanUsd": 2660000000,
"totalUsd": 13300000000,
"byExchange": [
{
"oiUsd": 5000000000,
"exchange": "okx"
}
]
},
"bestExecution": {
"prices": [
{
"ask": 116010,
"bid": 116000,
"last": 116005,
"exchange": "okx"
}
],
"bestAsk": {
"price": 116010,
"exchange": "okx"
},
"bestBid": {
"price": 116000,
"exchange": "gate"
},
"spreadPct": 0.0086
},
"exchangesQueried": 11
}
}Tags
x402
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