{"uid":"cap_V7tKgl-vTyPzk22V7NT5-","slug":"adctx-payment-verification-fbe3ee35","name":"adctx Payment Verification","description":"Is this x402 seller actually paid? Give a payTo address, get its verdict from our own read of Base: paid, single-payer, self-funded, dust-only or silent, with the number of payers, how many of them the seller itself funded, and the USDC that arrived in a fixed window every seller is measured over. The catalogue's own call counts are not payments: across 1 397 sellers we read both ways, 312 are called and receive nothing on chain.","url":"https://t.adctx.com/check?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","pattern":"^0x[a-fA-F0-9]{40}$","description":"the seller's payTo address"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.05","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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_-yGkOMz_X-v-Wc1U7buWy","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a given Base blockchain address (x402 seller payTo) has actually received on-chain payments, classifying it as paid, single-payer, self-funded, dust-only, or silent, with payer counts and USDC received.","exampleAgentPrompt":"Can you check whether the x402 seller at address 0x1234567890abcdef1234567890abcdef12345678 is actually getting paid on Base, or if it's just self-funded or silent?","exampleUseCases":[{"title":"Vetting an x402 API before integrating","prompt":"Before I integrate this x402 API, can you check if the seller address 0xAbCd1234567890abcdef1234567890abcdef1234 has real paying customers on Base or if it's just the owner calling their own service?"},{"title":"Filtering silent sellers from a catalogue","prompt":"I'm going through a list of x402 sellers and need to know which ones are actually receiving payments — can you check address 0xDead000000000000000000000000000000000001 and tell me if it's paid, self-funded, or silent?"},{"title":"Due diligence on a crypto API marketplace listing","prompt":"We're considering listing this seller on our marketplace — can you pull the on-chain payment verdict for 0xFeed000000000000000000000000000000000002, including how many payers they've had and how much USDC arrived?"}],"resultDescription":"Returns a payment verdict (paid, single-payer, self-funded, dust-only, or silent) for the queried Base address, along with the total number of unique payers, how many of those payers were the seller themselves (self-funded count), and the total USDC received within a fixed measurement window used consistently across all 1,397 sellers in the catalogue.","failureModes":["Invalid or malformed Ethereum address (not matching 0x + 40 hex chars) returns validation error","Address not found in the Base chain data returns silent verdict or no-data response","Base network read latency or unavailability may delay or fail responses","Rate limiting or payment failure at $0.05 USDC per call may block access"],"whenToPreferThis":"Use this endpoint when you need a fast, pre-computed on-chain verdict about whether an x402 seller's payTo address has genuine external payers on Base — especially useful for filtering self-funded or inactive sellers from a marketplace or catalogue. It is purpose-built for the x402 ecosystem and uses a consistent measurement window across all sellers, making it ideal for comparative analysis rather than raw blockchain queries.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T12:30:11.800Z","isFirstParty":false,"canonicalSlug":"adctx-payment-verification-fbe3ee35"}