{"id":"2af02e2e-a21e-495e-8bde-53b42eecbefe","shortId":"RhnPsx","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/33`. 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 USD.\n\nThe broader lowpaymentfee.com platform advertises a suite of APIs spanning data & analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments. Payment settles on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).\n\nNote that the specific KYC verification endpoint (`/api/v1/kyc/verifications/33`) is not listed on the site's landing page among the advertised APIs, and no documentation or schema details for this endpoint were found in the crawl. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. The actual request body format and response schema for this KYC endpoint are unknown.","tags":[],"capabilities":["kyc-verification","x402-payment","usdc-base","per-call-billing","no-api-key"],"categories":["identity","compliance"],"synonyms":["KYC API","identity verification","know your customer","compliance check","ID verification","x402 KYC","Base USDC payment API"],"warnings":["No documentation found for this specific KYC verification endpoint","The endpoint /api/v1/kyc/verifications/33 is not listed on the provider's landing page among advertised APIs","All doc/pricing/API pages returned only 'Connect wallet' with no substantive content","Request body format and response schema are completely unknown","The path includes a hardcoded ID (33) — unclear if this is a specific verification or a template"],"endpointUrl":"https://lowpaymentfee.com/api/v1/kyc/verifications/33","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/33","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured), but there is no documentation, no request/response schema, and the specific KYC endpoint is not listed among the site's advertised APIs. Docs pages returned only 'Connect wallet' with no content. The purpose and behavior of this endpoint must be inferred entirely from the URL 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'0.02':89,132 '000':80 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':155 '20':79 '402':58 '6':85 'Base USDC payment API' 'ID verification' 'KYC API' 'accept':48 'access':39,71 'actual':210 'advertis':95,175 'ai/ml':103 'among':173 'amount':74 'analysi':106 'analyt':102 'api':99,137,176,193 'base':5,18,52,81,150 'bodi':212 'broader':92 'call':9,22,77 'challeng':59 'classif':108 'commit':145 'compliance check' 'connect':202 'content':208 'contract':154 'convers':125 'crawl':190 'custom':36 'data':101 'decim':86 'detail':182 'doc':192 'document':179 'embed':109 'endpoint':3,16,28,55,128,162,185,220 'equal':88 'estim':119 'exchang':114 'feed':113 'financ':110 'format':213 'found':187 'gas':118 'generat':126 'geocod':123 'grant':70 'header':65 'identity verification' 'infer':104 'infrastructur':121 'key':138 'know':34 'know your customer' 'kyc':1,14,33,160,219 'kyc-verification' 'land':171 'limit':141 'list':130,166 'lowpaymentfee.com':30,93 'maximum':73 'minimum':144 'network':53,151 'no-api-key' 'note':156 'page':172,197 'paid':6,19 'payment':46,64,67,146 'per':8,21,76,133 'per-cal':7,20 'per-call-billing' 'platform':94 'price':112,194 'prompt':204 'proof':68 'protocol':47 'provid':31 'quot':117 'rate':115,140 'readm':196 'request':134,211 'requir':60,75 'respons':215 'return':56,199 'schema':181,216 'sentiment':105 'servic':38 'settl':147 'site':169 'span':100 'specif':159 'substant':207 'suit':97 'summar':107 'token':116 'unit':82 'unknown':222 'usd':90 'usdc':13,26,49,84,153 'usdc-base' 'use':43,152 'util':122 'valid':124 'verif':2,15,37,161 'via':10,23 'wallet':203 'web3':111 'x':63 'x-payment':62 'x402':11,24,45 'x402 KYC' 'x402-payment'","prices":[{"id":"2b44f836-8589-49ff-a9cd-2b5d25a092eb","listingId":"2af02e2e-a21e-495e-8bde-53b42eecbefe","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/33","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:04.780Z"}],"sources":[{"listingId":"2af02e2e-a21e-495e-8bde-53b42eecbefe","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/kyc/verifications/33","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:04.780Z","lastSeenAt":"2026-04-22T04:01:35.212Z"}],"details":{"listingId":"2af02e2e-a21e-495e-8bde-53b42eecbefe","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/33 \\\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":"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/33"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/33"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"}],"useCases":["Verifying customer identity as part of onboarding flows","Compliance checks for financial or Web3 applications","Automated KYC verification without managing API keys"],"bestFor":["Developers needing pay-per-call KYC without subscription commitments","Web3 applications that can settle payments in USDC on Base","Agents or automated systems using x402 payment protocol"],"notFor":["Users who need detailed documentation or schema before integrating","High-volume KYC pipelines requiring bulk pricing or SLAs","Applications that cannot settle payments in crypto on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:16.701Z"},"updatedAt":"2026-04-22T04:01:35.212Z"}}