{"uid":"cap_yBE-fb9kYl1PhXSpWgnrg","slug":"synthora-open-interest-oracle-37d4a0ef","name":"SYNTHORA Open Interest Oracle","description":"Live perpetual-futures open interest, funding rates, mark price, premium and crowded long/short signal for 230+ assets, sourced from Hyperliquid. Ed25519-signed. Pay-per-use via x402 USDC on Base.","url":"https://openinterest.hergertsynthora.com/service","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"asset":{"type":"string","description":"Perp symbol e.g. BTC, ETH, SOL. Omit for top-10 by OI"}}},"responseSchema":{"type":"json","example":{"ok":true,"niche":"open_interest","result":{"asset":"BTC","signal":"neutral","signed":"ed25519","mark_price":97500,"funding_rate":0.0000125,"open_interest_usd":2260000000}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_tazAt2vW-LfTZnSwo6fpr","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns live perpetual futures open interest, funding rates, mark price, premium, and crowded long/short signals for 230+ assets via Hyperliquid","exampleAgentPrompt":"What's the current open interest, funding rate, mark price, and crowded long/short signal for ETH on Hyperliquid perps right now?","exampleUseCases":null,"resultDescription":"Returns Ed25519-signed JSON containing open interest, funding rate, mark price, premium, and a crowded long/short signal for the requested asset (or top-10 assets by open interest if no asset is specified), sourced from Hyperliquid perpetuals data.","failureModes":["Unknown asset symbol returns error or empty result","Hyperliquid data feed unavailable causes service error","Invalid asset format (e.g. lowercase or unsupported token) may return no data","Network timeout on Hyperliquid upstream","Payment failure via x402 protocol results in 402 response"],"whenToPreferThis":"Use this endpoint when you need real-time perpetual futures market microstructure data — specifically open interest, funding rates, and crowding signals — sourced from Hyperliquid for 230+ assets. Prefer over generic market data APIs when you need Ed25519-signed trustworthy data and Hyperliquid-specific perp metrics like premium and crowded long/short signals.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:36:23.573Z","isFirstParty":false}