{"uid":"cap_O1XTW04BU0VXBUMpvBbqn","slug":"fundingfeed-cross-exchange-perpetual-open-interest-aggregator-bfc2d11a","name":"FundingFeed — Cross-Exchange Perpetual Open Interest Aggregator","description":"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.","url":"https://funding-feed.kaminariouji.workers.dev/open-interest?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","POST"],"type":"string"},"queryParams":{"type":"object","additionalProperties":true}}},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object"}}}}},"responseSchema":{"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}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"registry","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_BXOX1MBIvhAUcG0smHr7s","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bda02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns aggregated open interest in USD across 10+ perpetual futures venues (OKX, Bybit, Gate.io, HTX, Hyperliquid, BingX, Bitget, Kraken, Coinbase, MEXC) for BTC, ETH, or SOL, along with funding rates, annualized carry, cross-venue arb spread, next funding time, and best bid/ask execution price.","exampleAgentPrompt":"Pull the cross-exchange funding data for BTC right now — I want to see the funding rate at each venue, the annualized arb spread, total open interest, and the best bid/ask so I can decide where to leg into a cash-and-carry trade.","exampleUseCases":[{"title":"Funding arb opportunity scan for BTC","prompt":"Check BTC perpetual funding rates across OKX, Bybit, Gate, and the other major venues — I need the annualized rates, the cross-venue spread, and next funding times so I can pick the best long/short pair for a funding arb."},{"title":"Open interest crowding check for ETH","prompt":"How crowded is the ETH perpetual market right now? Give me total open interest in USD and a per-exchange breakdown so I can see where positioning is concentrated."},{"title":"Best execution venue for SOL perp order","prompt":"I'm about to place a SOL perpetual order — can you check the top-of-book best bid and ask across all the major venues so I know which exchange to route to for the tightest spread?"}],"resultDescription":"A JSON object containing: the queried symbol, per-exchange funding rates with annualized percentages and next funding timestamps, summary stats (min/max/mean annualized funding, arb spread), total open interest in USD with per-exchange breakdown, best bid and ask prices across venues with the spread percentage, number of exchanges successfully queried, and a generation timestamp.","failureModes":["One or more upstream exchange APIs unavailable — exchangesOk count will be less than exchangesQueried, partial data returned","Invalid or unsupported symbol — endpoint may return empty or error response","Rate limiting or payment failure (x402) — 402 response if USDC payment not attached","Network timeout to Cloudflare Worker — 5xx response","Stale data if upstream venue APIs are slow — generatedAt timestamp reflects freshness"],"whenToPreferThis":"Use this endpoint when you need a single aggregated call covering funding rates, open interest, and best execution across 10+ perpetual venues simultaneously for BTC, ETH, or SOL. It eliminates the need to query each exchange individually and provides pre-computed arb spreads and annualized carry figures. Prefer it over single-exchange APIs when doing cross-venue funding arbitrage analysis, cash-and-carry strategy timing, crowded-positioning detection via open interest, or best-execution routing decisions.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T12:38:05.779Z","isFirstParty":false,"canonicalSlug":"fundingfeed-cross-exchange-perpetual-open-interest-aggregator-bfc2d11a"}