{"id":"3effb116-2c53-4fdc-9678-fe74f671bc6a","shortId":"qRYmL4","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 at `/api/v1/kyc/verifications/18`. It is part of a broader platform offering dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network.\n\nThe specific endpoint probed here costs $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is made via the x402 `exact` scheme — callers attach an `X-PAYMENT` header with a signed payment to the payTo address. No API keys or rate limits are advertised; access is gated purely by micropayment. The endpoint accepts POST requests and returns `application/json`.\n\nDocumentation is extremely sparse. The landing page lists available API categories and a uniform $0.02/request price, but the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no explanation of what the KYC verification endpoint expects as input or returns as output. The endpoint is live (returns a proper 402 challenge), but without documentation it is unclear what request body is required or what verification data is returned.","tags":[],"capabilities":["kyc-verification","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["identity","compliance"],"synonyms":["KYC API","identity verification","know your customer","KYC check","identity validation","compliance verification","x402 KYC"],"warnings":["No API documentation available — docs, pricing, and API pages all render only a 'Connect wallet' prompt","No request or response schema provided; callers cannot determine required input fields","The KYC verification category may involve regulated data (PII); no compliance or privacy information is available","The endpoint path includes a numeric ID (/18) whose meaning is undocumented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/kyc/verifications/18","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/18","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 402 challenge, confirming it exists and accepts payments. However, there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what the KYC verification endpoint actually does or expects. The listing is effectively a 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'/request':163 '0.02':87,102,162 '000':93 '20':92 '402':215 '6':100 'KYC API' 'KYC check' 'accept':142 'access':39,134 'address':125 'advertis':133 'ai/ml':60 'analyt':59 'api':56,127,157,170 'application/json':147 'attach':112 'avail':156 'base':5,18,79,94 'base-network' 'bodi':225 'broader':47 'call':9,22 'caller':111 'categori':158 'challeng':216 'compliance verification' 'connect':176 'cost':86 'crypto':63 'custom':36 'data':58,231 'decim':101 'detail':183 'doc':167 'document':148,219 'dozen':50 'endpoint':3,16,28,68,83,141,200,209 'exact':109 'expect':201 'explan':194 'extrem':150 'financ':62 'gate':136 'header':117 'identity validation' 'identity verification' 'infer':61 'input':203 'key':128 'know':34 'know your customer' 'kyc':1,14,33,198 'kyc-verification' 'land':153 'limit':131 'list':155 'live':211 'lowpaymentfee.com':30 'made':105 'maxamountrequir':90 'micropay':139 'network':80 'no-api-key' 'offer':49 'openapi':187 'output':207 'page':154,171 'part':44 'pay':7,20,53 'pay-per-cal':6,19 'pay-per-request':52 'payment':72,103,116,121 'payto':124 'per':8,21,54,88 'platform':48 'post':143 'price':164,168 'probe':84 'prompt':178 'proper':214 'protocol':73 'provid':31 'pure':137 'rate':130 'render':173 'request':55,89,144,224 'request/response':190 'requir':227 'return':146,205,212,233 'schema':191 'scheme':110 'servic':38,66 'settl':74 'sign':120 'span':57 'spars':151 'spec':188 'specif':82 'technic':182 'unclear':222 'uniform':161 'unit':95 'usdc':13,26,76,97 'usdc-settlement' 'use':69 'util':65 'verif':2,15,37,199,230 'via':10,23,106 'wallet':177 'without':218 'x':115 'x-payment':114 'x402':11,24,71,108 'x402 KYC' 'x402-payment'","prices":[{"id":"df9440aa-190f-415f-a1c4-3c8b603e814d","listingId":"3effb116-2c53-4fdc-9678-fe74f671bc6a","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/18","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:46:55.051Z"}],"sources":[{"listingId":"3effb116-2c53-4fdc-9678-fe74f671bc6a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/kyc/verifications/18","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:46:55.051Z","lastSeenAt":"2026-04-22T07:00:59.803Z"}],"details":{"listingId":"3effb116-2c53-4fdc-9678-fe74f671bc6a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/18 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-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 maxAmountRequired of 20000 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/18"},{"claim":"All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/18"}],"useCases":["Verifying customer identity as part of onboarding flows","Compliance checks for financial or crypto applications","Automated KYC screening integrated into agent workflows"],"bestFor":["Developers needing pay-per-call KYC without subscription commitments","Agent-based workflows requiring programmatic identity verification","Crypto-native applications already on Base network"],"notFor":["Users needing detailed API documentation before integration","High-volume KYC pipelines requiring SLAs or guaranteed uptime","Regulated entities requiring audit trails and vendor compliance certifications"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:17.185Z"},"updatedAt":"2026-04-22T07:00:59.803Z"}}