{"uid":"cap_NU9bC2G0ff4TnwdmSrIx2","slug":"api-usenami-io-19f363d4","name":"Nami Cross-Venue Mark-Price Spread Scanner","description":"Cross-venue mark-price spread scan for crypto perpetuals — where the same perp trades at different marks across venues. Quoted spread is not net edge: it excludes fees, slippage and funding differences.","url":"https://api.usenami.io/v1/perp/arbitrage/price","method":"GET","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"},"method":{"type":"string"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003000","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"settled","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":"$0.003000/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_iqCuk2iGAgjP7eJaugct8","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Scans perpetual futures mark-prices across multiple venues to identify cross-venue price spreads for a given ticker, excluding fees, slippage, and funding differentials.","exampleAgentPrompt":"Scan across all venues and show me the current mark-price spread for ETH perpetuals — I want to see which exchanges have the widest price gap right now.","exampleUseCases":null,"resultDescription":"Returns cross-venue mark-price spread data showing price differences across trading venues for a given perpetual futures ticker, including the venues with the highest and lowest mark prices and the spread magnitude in basis points. Note: quoted spread is gross and excludes fees, slippage, and funding rate differentials.","failureModes":["Invalid or unsupported ticker symbol returns error","Missing required 'type' or 'method' fields returns 400 validation error","No spread data available for illiquid tickers","Payment failure (402) if x402 USDC payment not provided","Rate limiting if called too frequently","Venue data unavailable during maintenance windows"],"whenToPreferThis":"Use this endpoint when you need a real-time snapshot of mark-price divergence across perpetual futures venues — ideal for identifying raw price-based cross-venue arbitrage candidates. Prefer this over the funding-rate arbitrage scanner when you want price-level spreads rather than rate spreads, and over the top-of-book endpoint when you need a multi-venue comparative view rather than a single venue quote.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T12:41:35.710Z","isFirstParty":false}