{"uid":"cap_WJyHlh637NIvLcwIk2WDe","slug":"one-engine-number-sign-fd27fbac","name":"ONE Engine Number Sign","description":"Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.","url":"https://one-search.one-engine.workers.dev/v1/number/sign?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"value":{"type":"number"}}},"responseSchema":{"type":"json","example":{"value":-1}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.0009","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":"$0.0009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.0009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_mFTWUK_Bkq92TUr3LWfCM","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.0009","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the mathematical sign of a given number (-1, 0, or 1) via a pay-per-call API.","exampleAgentPrompt":"What is the mathematical sign of -73? I need just -1, 0, or 1 back.","exampleUseCases":[{"title":"Classify financial gain or loss","prompt":"Tell me the sign of -150.75 — I want to know if this delta is a loss, breakeven, or gain as -1, 0, or 1."},{"title":"Check sensor reading polarity","prompt":"Is the value 0.0032 positive, negative, or zero? Give me the sign as an integer."},{"title":"Determine direction of price movement","prompt":"I have a price change of -0.005 — what's its sign? I need -1, 0, or 1 to figure out which direction it moved."}],"resultDescription":"A JSON object with a single 'value' field containing the mathematical sign of the input: -1 if the input is negative, 0 if zero, or 1 if positive.","failureModes":["Missing or non-numeric 'value' field in request body returns an error","Non-finite values like NaN or Infinity may produce unexpected results","Payment failure via x402 protocol blocks the call","Network timeout on the Cloudflare Worker edge"],"whenToPreferThis":"Choose this endpoint when you need a fast, cheap, single-call signum function without spinning up your own compute — especially inside an agentic workflow where you want pay-per-use math utilities billed per call in USDC on Base.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T12:43:24.948Z","isFirstParty":false,"canonicalSlug":"one-engine-number-sign-fd27fbac"}