{"id":"4f16fe70-66a9-402d-aa54-8e40c2bd342c","shortId":"XdBRx3","kind":"x402","title":"KYC verification endpoint on Base, pay-per-call via x402 with USDC.","tagline":"KYC verification endpoint on Base, pay-per-call via x402 with USDC.","description":"This endpoint at lowpaymentfee.com provides a KYC (Know Your Customer) verification service accessible via the x402 payment protocol. The specific resource `/api/v1/kyc/verifications/21` accepts POST requests and charges up to $0.02 per call in USDC on the Base network. No API keys or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe hosting site lowpaymentfee.com offers a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced at $0.02 per request. However, the specific KYC verification endpoint's input schema, required POST body fields, and response format are not documented in any crawled page. The docs, pricing, and API pages all resolve to a minimal \"Connect wallet\" prompt with no further detail. Because of this, the exact capabilities and data returned by the KYC verification call remain unclear.\n\nPayment settles on Base using USDC (contract 0x8335…2913) to address 0x1A2B…85F3, with a maximum timeout of 300 seconds. The endpoint is live and returns a valid x402 challenge (HTTP 402).","tags":[],"capabilities":["kyc-verification","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["identity","compliance"],"synonyms":["KYC check","identity verification","know your customer","ID verification","compliance check","AML screening","customer verification"],"warnings":["No documentation available for request body schema or response format","All doc/pricing/API pages resolve to a minimal 'Connect wallet' prompt with no content","The exact nature and scope of the KYC verification is unknown — 'verifications/21' may refer to a specific verification record rather than a general-purpose endpoint","No OpenAPI spec or AI plugin manifest found","Regulated category (KYC/identity) — verify vendor compliance certifications independently"],"endpointUrl":"https://lowpaymentfee.com/api/v1/kyc/verifications/21","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/kyc/verifications/21","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is zero documentation on request/response schemas, required fields, or what the KYC verification actually checks. Docs pages are empty stubs. The listing is effectively a stub with only pricing and protocol details 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'0.02':56,110 '0x1a2b':181 '0x8335':177 '2913':178 '300':188 '402':201 '85f3':182 'AML screening' 'ID verification' 'KYC check' 'accept':49 'access':39 'address':180 'ai/ml':100 'analyt':99 'api':66,96,140 'attach':75 'base':5,18,63,173 'base-network' 'bodi':124 'broad':89 'call':9,22,58,95,167 'caller':73 'capabl':159 'catalog':90 'challeng':199 'charg':53 'compliance check' 'connect':147 'contract':176 'crawl':134 'custom':36 'customer verification' 'data':98,103,161 'detail':153 'doc':137 'document':131 'endpoint':3,16,28,118,191 'exact':158 'field':125 'finance/web3':102 'format':128 'header':79 'host':84 'howev':113 'http':200 'identity verification' 'infer':101 'infrastructur':105 'input':120 'key':67 'know':34 'know your customer' 'kyc':1,14,33,116,165 'kyc-verification' 'limit':70 'live':193 'lowpaymentfee.com':30,86 'maximum':185 'minim':146 'network':64 'no-api-key' 'offer':87 'page':135,141 'pay':7,20,93 'pay-per-cal':6,19,92 'pay-per-call' 'payment':43,78,170 'per':8,21,57,94,111 'post':50,123 'price':108,138 'prompt':149 'protocol':44 'provid':31 'rate':69 'remain':168 'request':51,82,112 'requir':72,122 'resolv':143 'resourc':47 'respons':127 'return':162,195 'schema':121 'second':189 'servic':38 'settl':171 'simpli':74 'site':85 'span':97 'specif':46,115 'timeout':186 'unclear':169 'usdc':13,26,60,175 'usdc-settlement' 'use':174 'util':106 'valid':197 'verif':2,15,37,117,166 'via':10,23,40 'wallet':148 'x402':11,24,42,77,198 'x402-payment'","prices":[{"id":"2cbe795d-9b61-4d00-80cb-e488c0e2406d","listingId":"4f16fe70-66a9-402d-aa54-8e40c2bd342c","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/kyc/verifications/21","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:03.595Z"}],"sources":[{"listingId":"4f16fe70-66a9-402d-aa54-8e40c2bd342c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/kyc/verifications/21","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:03.595Z","lastSeenAt":"2026-04-22T05:31:08.470Z"}],"details":{"listingId":"4f16fe70-66a9-402d-aa54-8e40c2bd342c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/21 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units (USDC, 6 decimals = $0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/21"},{"claim":"All APIs on the site are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/21"}],"useCases":["Verifying customer identity as part of onboarding flows","Automated KYC checks in fintech or Web3 applications","Agent-driven compliance verification without API key management"],"bestFor":["Developers needing pay-per-call KYC without subscriptions","AI agents that can settle payments via x402 on Base","Web3 applications requiring on-chain payment for compliance services"],"notFor":["Users who need detailed documentation before integrating","High-volume KYC pipelines requiring bulk pricing or SLAs","Regulated environments that require auditable vendor certifications"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:16.804Z"},"updatedAt":"2026-04-22T05:31:08.470Z"}}