{"id":"bbf2ed3f-bbfc-4867-aa2d-22c2ca150fa9","shortId":"9P9vzJ","kind":"x402","title":"KYC verification endpoint on Base, paid per-call via x402 with USDC.","tagline":"KYC verification endpoint on Base, paid per-call via x402 with USDC.","description":"This endpoint at lowpaymentfee.com provides a KYC (Know Your Customer) verification service accessible at `/api/v1/kyc/verifications/5`. It uses the x402 payment protocol, accepting USDC on the Base network. The price per request is $0.02 (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the endpoint.\n\nThe broader lowpaymentfee.com platform advertises a range of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request and settle on the Base network using USDC.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what input the KYC verification endpoint expects or what it returns. The endpoint is confirmed live (returns a proper 402 x402 challenge), but without documentation it is unclear what data must be POSTed or what the response payload looks like.","tags":[],"capabilities":["kyc-verification","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["identity","compliance"],"synonyms":["KYC API","identity verification","know your customer","AML check","ID verification","customer verification","compliance API"],"warnings":["No documentation available — all doc/pricing/API pages render only 'Connect wallet'","No OpenAPI or input/output schema provided for the KYC endpoint","Purpose and expected input of '/api/v1/kyc/verifications/5' is unclear — the path segment '5' may be a hardcoded example or a verification ID","The broader platform lists many diverse API categories but none have documented schemas","Cannot verify what KYC data source or methodology is used"],"endpointUrl":"https://lowpaymentfee.com/api/v1/kyc/verifications/5","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/5","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 documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no explanation of what the KYC verification endpoint actually does or expects. The listing is effectively a 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'0.02':59,140 '000':61 '20':60 '402':204 '6':67 'AML check' 'ID verification' 'KYC API' 'accept':48 'access':39,92 'advertis':99 'ai/ml':111 'analysi':114 'analyt':110 'api':70,107,157 'attach':79 'base':5,18,52,62,147 'base-network' 'broader':96 'call':9,22,106 'caller':77 'challeng':206 'classif':116 'compliance API' 'confirm':199 'connect':166 'content':172 'convers':133 'custom':36 'customer verification' 'data':109,119,214 'decim':68 'descript':183 'doc':156 'document':151,209 'embed':117 'endpoint':3,16,28,94,136,190,197 'estim':127 'exampl':180 'exchang':122 'expect':191 'extrem':153 'feed':121 'finance/web3':118 'gas':126 'generat':134 'geocod':131 'header':84 'identity verification' 'infer':112 'infrastructur':129 'input':186 'key':71 'know':34 'know your customer' 'kyc':1,14,33,188 'kyc-verification' 'like':224 'limit':74 'list':138 'live':200 'look':223 'lowpaymentfee.com':30,97 'must':215 'network':53,148 'no-api-key' 'openapi':176 'page':161 'paid':6,19 'pay':104 'pay-per-cal':103 'pay-per-call' 'payload':222 'payment':46,83,89 'per':8,21,56,105,141 'per-cal':7,20 'platform':98 'post':217 'price':55,120,158 'prompt':168 'proof':90 'proper':203 'protocol':47 'provid':31 'quot':125 'rang':101 'rate':73,123 'readm':160 'render':163 'request':57,142 'request/response':179 'requir':76 'respons':221 'return':195,201 'schema':177 'sentiment':113 'servic':38 'settl':144 'simpli':78 'span':108 'spars':154 'summar':115 'token':124 'unclear':212 'unit':63 'usdc':13,26,49,65,150 'usdc-settlement' 'use':43,149 'util':130 'valid':87,132 'verif':2,15,37,189 'via':10,23 'wallet':167 'without':208 'x':82 'x-payment':81 'x402':11,24,45,88,205 'x402-payment'","prices":[{"id":"522865e2-1518-4dd6-8d44-d0202b72f246","listingId":"bbf2ed3f-bbfc-4867-aa2d-22c2ca150fa9","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/5","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:59.935Z"}],"sources":[{"listingId":"bbf2ed3f-bbfc-4867-aa2d-22c2ca150fa9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/kyc/verifications/5","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:59.935Z","lastSeenAt":"2026-04-22T05:31:08.235Z"}],"details":{"listingId":"bbf2ed3f-bbfc-4867-aa2d-22c2ca150fa9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/5 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 402 challenge with USDC on Base network, maxAmountRequired 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/5"},{"claim":"All APIs 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 address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/5"},{"claim":"Docs, API, pricing, and README pages all show only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Verifying customer identity as part of onboarding flows","Automated KYC checks for fintech or Web3 applications","Compliance screening without managing API key provisioning"],"bestFor":["Developers needing pay-per-call KYC without subscription commitments","Web3 applications that can settle payments in USDC on Base","Agents or bots that can attach x402 payment headers automatically"],"notFor":["Teams requiring detailed API documentation and SLAs before integration","High-volume KYC pipelines where per-call pricing may not be cost-effective","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:16.94Z"},"updatedAt":"2026-04-22T05:31:08.235Z"}}