{"uid":"cap_grDMozRloETEbOsibcTDq","slug":"asin402-deal-check-83642e4a","name":"ASIN402 Deal Check","description":"Is this Amazon price a good deal? Buy now or wait. Price check against history for any ASIN: compares today's price with its 30/90/180-day averages and typical 180-day range (fake-low outlier offers filtered out) and returns a verdict (buy_now, fair_price, wait or verify_offer) with a one-line reason. Use before buying or recommending a product. Amazon price tracker / price drop check. 11 marketplaces. Free sample: /api/sample/deal-check","url":"https://asin402.com/api/deal-check?utm_source=zero.xyz","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","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["asin"],"properties":{"asin":{"type":"string","description":"Amazon ASIN, 10 characters (books: ISBN-10)"},"domain":{"type":"string","description":"Marketplace: us, uk, de, fr, jp, ca, it, es, in, mx, br. Default us"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","properties":{"asin":{"type":"string"},"title":{"type":"string"},"reason":{"type":"string"},"avg_30d":{"type":"number"},"avg_90d":{"type":"number"},"verdict":{"type":"string"},"avg_180d":{"type":"number"},"currency":{"type":"string"},"data_as_of":{"type":"string"},"marketplace":{"type":"string"},"median_180d":{"type":"number"},"price_basis":{"type":"string"},"current_price":{"type":"number"},"typical_low_180d":{"type":"number"},"typical_high_180d":{"type":"number"},"percent_vs_90d_avg":{"type":"number"}}}}}}},"responseSchema":{"type":"json","example":{"asin":"0735211299","title":"Atomic Habits: An Easy & Proven Way to Build Good Habits & Break Bad Ones","reason":"Price is at or near the low end of its usual range.","avg_30d":26.5,"avg_90d":28.99,"verdict":"buy_now","avg_180d":29.5,"currency":"USD","data_as_of":"2026-10-26T18:40:00.000Z","marketplace":"us","median_180d":29.5,"price_basis":"buy_box","current_price":24.99,"typical_low_180d":25.5,"typical_high_180d":29.5,"percent_vs_90d_avg":-13.8}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Fr5LWQoZ3zlRenglmNk-9","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether an Amazon product's current price is a good deal by comparing it against its 30/90/180-day price history and returning a buy verdict with reasoning.","exampleAgentPrompt":"Is the Amazon price for ASIN B09G9FPHY6 on the US marketplace a good deal right now, or should I wait — give me the verdict and compare it to its historical averages?","exampleUseCases":[{"title":"Pre-purchase deal validation","prompt":"Before I buy this item on Amazon — ASIN 0735211299 — can you check if the current price is actually a good deal compared to its historical prices, or if I should wait?"},{"title":"Gift recommendation price check","prompt":"I'm thinking of recommending ASIN B08L5TNJHK on Amazon UK as a gift — is today's price near a historical low or is it overpriced right now?"},{"title":"Affiliate or reseller deal verification","prompt":"I want to promote this Amazon product ASIN B07XJ8C8F5 in Germany — check if the current price is at a fair level or if buyers should hold off, and tell me the verdict with the reason."}],"resultDescription":"Returns a JSON object with the product title, current price, 30/90/180-day average prices, 180-day median, typical low and high for the 180-day window, percentage difference vs the 90-day average, a verdict string (buy_now, fair_price, wait, or verify_offer), a one-line reason explaining the verdict, the marketplace, currency, and a data timestamp.","failureModes":["Invalid or non-existent ASIN returns an error or empty result","Insufficient price history for a newly listed product may limit verdict accuracy","Unsupported marketplace code returns an error","Fake-low outlier offers are filtered but edge cases may still affect averages","Product with no recent buy-box price may return null for current_price"],"whenToPreferThis":"Use this endpoint when you need a quick, opinionated verdict on whether an Amazon price is worth acting on now versus waiting. It is purpose-built for deal validation with fake-low outlier filtering and structured verdicts, making it superior to raw price-history lookups when you want an actionable recommendation rather than raw data. Prefer this over generic price trackers when you need a single call that returns both historical context and a clear buy/wait signal across 11 Amazon marketplaces.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-31T18:30:13.170Z","isFirstParty":false,"canonicalSlug":"asin402-deal-check-83642e4a"}