{"uid":"cap_kKzxb07Pm7bVYhmQtVCsA","slug":"gtin-to-asin-lookup-openwebninja-dfb2a27a","name":"GTIN to ASIN Lookup (OpenWebNinja)","description":"40+ public web-data, SERP, e-commerce, real-estate, finance and AI-search APIs, payable per call over x402 (USDC on Base, Polygon, Arbitrum). No account or API key required. Most endpoints $0.003; AI-model endpoints $0.005.","url":"https://x402.openwebninja.com/realtime-amazon-data/gtin-to-asin","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"required":{"type":"string"},"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","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":"$0.003/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_h4HzIZbjqPsUv-OS7N9Hz","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":"Converts a product's GTIN/barcode to Amazon ASIN(s), returning product details like price, title, ratings, and product URL for a given Amazon marketplace country.","exampleAgentPrompt":"Find the Amazon ASIN and current price for the product with GTIN 012345678905 on the US marketplace.","exampleUseCases":null,"resultDescription":"Returns an array of matched Amazon products, each including the ASIN, canonical Amazon product URL, product title, price, main image URL, sales rank and rank category, total number of customer ratings, and average star rating. Also includes a response status and unique request ID.","failureModes":["No matching ASIN found for the given GTIN — returns empty products array","Invalid or malformed GTIN returns an error response","Unsupported country code returns validation error","Product not listed in the requested marketplace returns no results","Payment/x402 authentication failure if USDC not provided"],"whenToPreferThis":"Use this endpoint when you need to bridge the physical retail world (barcodes, GTINs, UPCs, EANs) with Amazon's catalog — ideal for price comparison tools, inventory management, product data enrichment, or any workflow that starts with a physical product barcode and needs Amazon listing details. Supports 24 Amazon marketplace countries.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T20:39:04.010Z","isFirstParty":false}