{"uid":"cap_xqTgwk-ZzF60WhqkY5CV6","slug":"preflight-perps-funding-rate-checker-3e6d50e3","name":"PreFlight Perps Funding Rate Checker","description":"Pre-trade & pre-sign checks for autonomous agents: everything an agent verifies BEFORE signing a transaction — token due diligence, calldata red-flag decoding, oracle freshness, holder concentration, bridge routing with executable calldata, cross-venue perp funding, gas and price sanity checks. EVM chains: Ethereum, Base, Arbitrum, Optimism.","url":"https://meryol-agenticmarket-x402.hf.space/perps/funding/%7Bmarket%7D","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"notes":[],"market":"BTC","venues":[{"notes":[],"venue":"hyperliquid","market":"BTC","mark_price":68000,"funding_apr":0.11,"funding_rate_8h":0.0001,"open_interest_usd":1200000000},{"notes":[],"venue":"dydx","market":"BTC-USD","mark_price":68010,"funding_apr":0.21,"funding_rate_8h":0.0002,"open_interest_usd":200000000}],"median_apr":0.12}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","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_z6Ob1kkua6XJTtiblmiP7","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 cross-venue perpetual futures funding rates, APR, mark price, and open interest for a given market symbol across venues like Hyperliquid and dYdX.","exampleAgentPrompt":"Before I open a BTC long on Hyperliquid, check the current funding rates and APR for BTC perps across all major venues so I can see if I'm getting a good deal or if dYdX or another venue is cheaper.","exampleUseCases":[{"title":"Compare ETH perp funding costs","prompt":"I'm about to open a long ETH perpetual position — can you pull the current funding rates and annualized APR for ETH perps across all available venues so I can figure out which exchange will cost me the least to hold overnight?"},{"title":"Check if SOL funding is elevated","prompt":"Before I enter a SOL perp trade, check the funding rates across Hyperliquid, dYdX, and any other venues you can find — I want to know if funding is unusually high right now or if it's a reasonable time to open a long."},{"title":"Find cheapest venue for BTC short","prompt":"I'm thinking of shorting BTC perps and want to actually get paid funding rather than pay it — can you compare the current funding rates and open interest across all major perp venues and tell me where the rate is most favorable for a short position right now?"}],"resultDescription":"A JSON object containing per-venue data for the requested market: venue name, market ticker, mark price, 8-hour funding rate, annualized funding APR, and open interest in USD. Also includes a cross-venue median APR and any advisory notes.","failureModes":["Unknown or unsupported market symbol returns empty venues array or error","Venue API downtime may result in missing entries for specific venues","Stale data if upstream oracles or venue feeds are temporarily unavailable","Malformed market parameter (e.g. lowercase or wrong format) may return no results"],"whenToPreferThis":"Use this endpoint when an agent needs to compare perpetual futures funding costs across multiple DeFi venues (Hyperliquid, dYdX, etc.) before entering or holding a position. Ideal for pre-trade due diligence workflows where funding rate arbitrage or cost minimization is important. Prefer over single-venue APIs when cross-venue comparison and median benchmarking are needed.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T06:41:20.482Z","isFirstParty":false}