{"uid":"cap_r7ppyOHiICNsZHei3KfFE","slug":"delx-commerce-carry-to-spot-price-calculator-80577517","name":"Delx Commerce — Carry-to-Spot Price Calculator","description":"Pay-per-result APIs for agents. No signup. Exact price. Verifiable delivery. USDC on Base + Solana via x402.","url":"https://commerce.delx.ai/api/v1/x402/carry-to-spot?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"days":{"type":"integer","description":"Days to delivery or horizon"},"future":{"type":"number","description":"Futures/mark price"},"carry_apr":{"type":"number","description":"Annualized carry rate as decimal"}}},"responseSchema":{"type":"json","example":{"schema":"delx/util-carry-to-spot/v1","implied_spot":100.5866302864939}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_KDIXsstbwvWLilhkzj1wI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Derives the implied spot price from a futures/mark price by backing out the carry (funding) over a given delivery horizon.","exampleAgentPrompt":"The BTC futures mark price is $101,000 with an annualized carry rate of 18% and 30 days to delivery — what's the implied spot price?","exampleUseCases":[{"title":"Crypto futures fair-value check","prompt":"ETH perpetual mark price is $3,500, the annualized funding rate is 22%, and there are 7 days left in the period — can you work out the implied spot price for me?"},{"title":"Basis trading arbitrage analysis","prompt":"I'm looking at a BTC futures contract priced at $68,000 with a carry APR of 15% and 90 days to expiry. What spot price does that imply so I can check if there's a basis arb opportunity?"},{"title":"Options model spot calibration","prompt":"For my options pricing model I need the implied spot given a futures mark of $2,200, an annualized carry of 8.5%, and a 14-day horizon — can you calculate that?"}],"resultDescription":"A JSON object containing the schema identifier ('delx/util-carry-to-spot/v1') and a single numeric field 'implied_spot' representing the derived spot price, e.g. {\"schema\":\"delx/util-carry-to-spot/v1\",\"implied_spot\":100.5866302864939}.","failureModes":["Missing required fields (days, future, carry_apr) returns an error response","Non-positive days value may produce nonsensical or error output","Carry rate passed as a percentage instead of a decimal (e.g. 18 instead of 0.18) produces wrong implied spot","Payment failure via x402 protocol blocks the call","Invalid JSON body returns 400-level error"],"whenToPreferThis":"Use this endpoint when you need a quick, trustless, pay-per-use computation to derive implied spot price from futures/mark price and a known carry (funding) rate, especially in agent workflows where no signup or API key management is desired. Prefer it over manual formula implementation when you want verifiable, on-chain-settled micro-payments (USDC on Base/Solana) and a canonical schema-versioned response. Not suitable for scenarios requiring real-time live price feeds — this is a pure mathematical derivation from inputs you supply.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T03:40:23.985Z","isFirstParty":false,"canonicalSlug":"delx-commerce-carry-to-spot-price-calculator-80577517"}