{"id":"6a4d1eb3-b021-4259-8e05-1da144d523c4","shortId":"9YHcSy","kind":"x402","title":"KYC verification endpoint paid per-call with USDC on Base via x402.","tagline":"KYC verification endpoint paid per-call with USDC on Base via x402.","description":"This endpoint at lowpaymentfee.com provides a KYC (Know Your Customer) verification service accessible via the x402 payment protocol. The specific path `/api/v1/kyc/verifications/20` accepts POST requests and charges $0.02 per call in USDC on the Base network. Payment is handled inline via the x402 header — no API keys, accounts, or rate limits are required.\n\nThe provider, lowpaymentfee.com, hosts a broader 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 KYC verification endpoint is not listed on the provider's public landing page, so its exact input schema and response format are undocumented in the crawled material. The x402 challenge confirms the endpoint is live and accepts POST with `application/json` content type, settling payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base.\n\nBecause no OpenAPI spec, request/response examples, or detailed documentation were found for this specific endpoint, the exact fields required in the POST body and the structure of the verification response remain unknown. Users should expect to experiment or contact the provider for integration details.","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","customer verification"],"warnings":["KYC verification endpoint is not listed on the provider's public landing page — may be experimental or unlisted.","No request body schema or response schema available; integration requires guesswork or provider contact.","KYC/identity verification is a regulated category — verify the provider's compliance posture before relying on results.","Documentation pages (/docs, /api, /pricing, /README) returned only a 'Connect wallet' prompt with no useful content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/kyc/verifications/20","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/20","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge confirms the endpoint is live and priced, but there is no documentation, no OpenAPI schema, no request/response examples, and the KYC endpoint is not even listed on the provider's own landing page. Effectively a stub with verified 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'0.02':54,106 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':157 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':160 'ID verification' 'KYC check' 'accept':49,147 'access':39 'account':74 'address':156 'ai/ml':96 'analyt':95 'api':72,92 'application/json':150 'base':11,24,61,162 'base-network' 'bodi':185 'broader':85 'call':7,20,56,91 'catalog':86 'challeng':140 'charg':53 'compliance check' 'confirm':141 'contact':201 'content':151 'crawl':136 'custom':36 'customer verification' 'data':94,99 'detail':170,206 'document':171 'endpoint':3,16,28,113,143,177 'exact':126,179 'exampl':168 'expect':197 'experi':199 'field':180 'finance/web3':98 'format':131 'found':173 'handl':65 'header':70 'host':83 'howev':109 'identity verification' 'infer':97 'infrastructur':101 'inlin':66 'input':127 'integr':205 'key':73 'know':34 'know your customer' 'kyc':1,14,33,111 'kyc-verification' 'land':122 'limit':77 'list':116 'live':145 'lowpaymentfee.com':30,82 'materi':137 'network':62 'no-api-key' 'openapi':165 'page':123 'paid':4,17 'path':47 'pay':89 'pay-per-cal':88 'pay-per-call' 'payment':43,63,154 'per':6,19,55,90,107 'per-cal':5,18 'post':50,148,184 'price':104 'protocol':44 'provid':31,81,119,203 'public':121 'rate':76 'remain':193 'request':51,108 'request/response':167 'requir':79,181 'respons':130,192 'schema':128 'servic':38 'settl':153 'span':93 'spec':166 'specif':46,176 'structur':188 'type':152 'undocu':133 'unknown':194 'usdc':9,22,58,159 'usdc-settlement' 'use':158 'user':195 'util':102 'verif':2,15,37,112,191 'via':12,25,40,67 'x402':13,26,42,69,139 'x402-payment'","prices":[{"id":"48f6df73-3720-4ffd-a03b-f7a14630a6a1","listingId":"6a4d1eb3-b021-4259-8e05-1da144d523c4","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/20","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:56.864Z"}],"sources":[{"listingId":"6a4d1eb3-b021-4259-8e05-1da144d523c4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/kyc/verifications/20","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:56.864Z","lastSeenAt":"2026-04-22T07:00:59.861Z"}],"details":{"listingId":"6a4d1eb3-b021-4259-8e05-1da144d523c4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/20 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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 x402Version 1, accepting USDC on Base network with maxAmountRequired of 20000 base units ($0.02).","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/20"},{"claim":"The provider lists all APIs 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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 and payTo is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/20"}],"useCases":["Verifying customer identity as part of onboarding flows","Compliance checks for financial or Web3 applications","Automated KYC screening triggered by agent workflows","On-demand identity verification without subscription commitments"],"bestFor":["Developers needing low-cost, no-signup KYC verification","Agent-based workflows requiring inline crypto-paid identity checks","Applications on Base network that want native USDC settlement"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Bulk KYC processing where per-call pricing may not be cost-effective","Workflows requiring fiat-only payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:17.128Z"},"updatedAt":"2026-04-22T07:00:59.861Z"}}