{"id":"e8a55549-d397-4b42-bd71-993c7ec05c60","shortId":"CAZDnb","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/47`. It uses the x402 payment protocol, accepting USDC on the Base network. The endpoint returns a 402 challenge requiring an X-PAYMENT header with payment proof before granting access. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe broader lowpaymentfee.com platform advertises a wide catalog of pay-per-call APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. However, this specific listing is for the KYC verifications endpoint. The exact input schema and response format are not documented in the crawled material; the endpoint accepts HTTP POST requests and returns application/json.\n\nNote that the endpoint path includes a numeric ID (`47`), which may represent a specific verification record or configuration. Without further documentation it is unclear whether this ID is user-supplied or fixed. The docs, pricing, and README pages on the site all render only a \"Connect wallet\" prompt with no additional technical documentation.","tags":[],"capabilities":["kyc-verification","x402-payment","usdc-base-network","pay-per-call","http-post","json-response"],"categories":["identity","compliance"],"synonyms":["KYC API","identity verification","know your customer","AML check","ID verification","customer verification","compliance API"],"warnings":["No API documentation available — docs, pricing, and README pages all render only 'Connect wallet'","Request body schema and response schema are completely undocumented","The endpoint path includes a fixed ID (47) with no explanation of its meaning","KYC/identity verification is a regulated category — verify compliance requirements before use","Cannot confirm what data the KYC verification actually checks or returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/kyc/verifications/47","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/47","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC on Base at $0.02/call. However, there is no documentation of request/response schemas, no explanation of what the KYC verification actually checks or returns, and the docs pages are empty. The endpoint path contains a hardcoded ID with no explanation. This is effectively a stub 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'0.02':89,118 '000':80 '20':79 '402':58 '47':173 '6':85 'AML check' 'ID verification' 'KYC API' 'accept':48,157 'access':39,71 'addit':216 'advertis':96 'ai/ml':109 'amount':74 'analyt':108 'api':105,123 'application/json':163 'base':5,18,52,81 'broader':93 'call':9,22,77,104 'catalog':99 'challeng':59 'commit':130 'compliance API' 'configur':182 'connect':211 'crawl':153 'custom':36 'customer verification' 'data':107 'decim':86 'doc':199 'document':150,185,218 'endpoint':3,16,28,55,140,156,167 'equal':88 'exact':142 'finance/web3':111 'fix':197 'format':147 'grant':70 'header':65 'howev':131 'http':158 'http-post' 'id':172,191 'identity verification' 'includ':169 'infer':110 'infrastructur':113 'input':143 'json-response' 'key':124 'know':34 'know your customer' 'kyc':1,14,33,138 'kyc-verification' 'limit':127 'list':134 'lowpaymentfee.com':30,94 'materi':154 'maximum':73 'may':175 'network':53 'note':164 'numer':171 'page':203 'paid':6,19 'path':168 'pay':102 'pay-per-cal':101 'pay-per-call' 'payment':46,64,67 'per':8,21,76,90,103,119 'per-cal':7,20 'platform':95 'post':159 'price':116,200 'prompt':213 'proof':68 'protocol':47 'provid':31 'rate':126 'readm':202 'record':180 'render':208 'repres':176 'request':91,120,160 'requir':60,75 'respons':146 'return':56,162 'schema':144 'servic':38 'site':206 'span':106 'specif':133,178 'suppli':195 'technic':217 'unclear':188 'unit':82 'usdc':13,26,49,84 'usdc-base-network' 'use':43 'user':194 'user-suppli':193 'util':114 'verif':2,15,37,139,179 'via':10,23 'wallet':212 'whether':189 'wide':98 'without':183 'x':63 'x-payment':62 'x402':11,24,45 'x402-payment'","prices":[{"id":"15ad377f-6205-43d3-b97b-69ca785baf7c","listingId":"e8a55549-d397-4b42-bd71-993c7ec05c60","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/47","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:55.656Z"}],"sources":[{"listingId":"e8a55549-d397-4b42-bd71-993c7ec05c60","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/kyc/verifications/47","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:55.656Z","lastSeenAt":"2026-04-22T07:00:59.803Z"}],"details":{"listingId":"e8a55549-d397-4b42-bd71-993c7ec05c60","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/47 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -d '{}'","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/kyc/verifications/47","body":{},"method":"POST","headers":{"X-PAYMENT":"<x402-payment-proof>","Content-Type":"application/json"}},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/47"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/47"}],"useCases":["Verifying customer identity as part of onboarding flows","Automated KYC checks for fintech or Web3 applications","Compliance verification for regulated transactions","Agent-driven identity verification without API key management"],"bestFor":["Developers needing low-cost per-call KYC checks","Web3 applications that can pay with USDC on Base","Agents or bots that need keyless, pay-as-you-go identity verification"],"notFor":["Users who need detailed API documentation before integrating","High-volume KYC pipelines requiring bulk pricing or SLAs","Applications that cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:17.186Z"},"updatedAt":"2026-04-22T07:00:59.803Z"}}