{"uid":"cap_O27_rnQr5S9my_EdVVtEw","slug":"conditioncheck-a68a60b8","name":"ConditionCheck","description":"Paid x402 API that checks whether a factual condition is currently true on a public webpage.","url":"https://conditioncheck-mainnet-production.up.railway.app/check?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","format":"uri","description":"Public http(s) page to inspect"},"condition":{"type":"string","maxLength":500,"minLength":3,"description":"A factual condition to evaluate from the current page, such as price, stock, deadline, or status"}}},"responseSchema":{"type":"json","example":{"answer":"Yes","evidence":["Price shown: $479","Status shown: In stock"],"checked_at":"2026-10-08T13:00:00.000Z","confidence":0.98,"source_url":"https://example.com/product","condition_met":true,"observed_values":[{"name":"price","value":"$479"},{"name":"stock","value":"In stock"}]}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_NjjG_njL2y11BaUoXcwNI","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a specific factual condition is currently true on a given public webpage, returning a yes/no answer with supporting evidence.","exampleAgentPrompt":"Check whether the iPhone 16 Pro 256GB is currently in stock on https://www.apple.com/shop/buy-iphone/iphone-16-pro and confirm the condition 'iPhone 16 Pro 256GB is available to add to cart'.","exampleUseCases":[{"title":"E-commerce stock availability check","prompt":"Is the Nike Air Max 270 in size 10 still in stock? Check https://www.nike.com/t/air-max-270-mens-shoes/AH8050-002 and confirm whether the condition 'size 10 is available to purchase' is true right now."},{"title":"Price threshold verification","prompt":"Can you check https://www.bestbuy.com/site/samsung-65-class-qled-4k-tv/6401722.p and verify the condition 'the listed sale price is under $800'? I want to know if it's true with what evidence the page shows."},{"title":"Event registration deadline check","prompt":"Please check https://devcon.org/en/tickets/ and verify whether the condition 'early bird ticket registration is still open' is currently true — I need to know before I decide to sign up today."}],"resultDescription":"A JSON object containing a boolean 'condition_met' field, a plain-language 'answer' (Yes/No), an array of 'evidence' strings quoting relevant text found on the page, a 'confidence' score between 0 and 1, the 'source_url' that was checked, a 'checked_at' ISO timestamp, and an 'observed_values' array of named key-value pairs extracted from the page (e.g. price, stock status).","failureModes":["URL is not publicly accessible or requires authentication — returns error or low-confidence result","Condition is ambiguous or too broad — may return low confidence or inconclusive answer","Page uses heavy JavaScript rendering that prevents content access — evidence may be incomplete","Condition references information not present on the specified page — answer may be No with no supporting evidence","Malformed URL input — returns validation error","Page content has changed between request and evidence extraction — timestamp helps detect staleness"],"whenToPreferThis":"Choose ConditionCheck when you need a structured, evidence-backed true/false answer about a specific factual condition on a public webpage — especially for price checks, stock availability, status verification, or deadline monitoring. It is preferable over generic web scrapers when you need not just raw content but a validated boolean answer with confidence scoring and cited evidence. Best suited for single-page spot checks rather than broad site crawls.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T12:30:04.352Z","isFirstParty":false,"canonicalSlug":"conditioncheck-a68a60b8"}