{"id":"8ec8ac62-3723-44c5-b3f2-1c23e71ae7b4","shortId":"M7Z6w8","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 via the x402 payment protocol. The specific resource `/api/v1/kyc/verifications/81` accepts POST requests and charges up to $0.02 per call in USDC on the Base network. Payment is handled inline via the x402 header mechanism — no API keys, accounts, or rate limits are required.\n\nThe parent site lowpaymentfee.com hosts a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced at $0.02 per request. This particular endpoint falls under a KYC/verification category that is not prominently listed on the homepage but is live and returning a valid 402 challenge. The endpoint's exact input schema and response format are not documented in the crawled material; callers should expect to POST a JSON body and receive a JSON response, but the specific fields required for the verification request are unknown.\n\nSettlement occurs on Base mainnet to a specified wallet address, using the canonical USDC contract (0x8335…). The x402 challenge specifies a maximum timeout of 300 seconds and uses the \"exact\" payment scheme with x402 version 1.","tags":[],"capabilities":["kyc-verification","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["identity","compliance"],"synonyms":["KYC check","identity verification","know your customer","ID verification","compliance check","AML verification","x402 KYC"],"warnings":["No input schema or request body documentation available — callers must guess at required fields","KYC/verification endpoints are not listed on the provider's homepage; unclear if this is a production service","KYC services may be subject to regulatory requirements (e.g., data protection, PII handling) — no privacy policy or compliance documentation was found","The '/81' path segment suggests a specific verification record rather than a general-purpose endpoint; purpose is ambiguous","Documentation pages (/docs, /pricing, /api, /README) returned no meaningful content beyond 'Connect wallet'"],"endpointUrl":"https://lowpaymentfee.com/api/v1/kyc/verifications/81","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/81","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, but there is no documentation of the request body schema, response format, or what 'verifications/81' specifically refers to. The docs, pricing, and API pages all returned only a 'Connect wallet' stub with no useful content. The KYC category is not listed on the homepage. This is effectively a stub 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'0.02':56,110 '0x8335':193 '1':213 '300':202 '402':136 'AML verification' 'ID verification' 'KYC check' 'accept':49 'access':39 'account':77 'address':187 'ai/ml':100 'analyt':99 'api':75,96 'base':5,18,63,181 'base-network' 'bodi':161 'broad':89 'call':9,22,58 'caller':154 'canon':190 'catalog':90 'categori':120 'challeng':137,196 'charg':53 'compliance check' 'contract':192 'crawl':152 'custom':36 'data':98,103 'document':149 'endpoint':3,16,28,115,139 'exact':141,207 'expect':156 'fall':116 'field':170 'finance/web3':102 'format':146 'handl':67 'header':72 'homepag':128 'host':87 'identity verification' 'infer':101 'infrastructur':105 'inlin':68 'input':142 'json':160,165 'key':76 'know':34 'know your customer' 'kyc':1,14,33 'kyc-verification' 'kyc/verification':119 'limit':80 'list':125 'live':131 'lowpaymentfee.com':30,86 'mainnet':182 'materi':153 'maximum':199 'mechan':73 'network':64 'no-api-key' 'occur':179 'parent':84 'particular':114 'pay':7,20,93 'pay-per-cal':6,19 'pay-per-request':92 'payment':43,65,208 'per':8,21,57,94,111 'post':50,158 'price':108 'promin':124 'protocol':44 'provid':31 'rate':79 'receiv':163 'request':51,95,112,175 'requir':82,171 'resourc':47 'respons':145,166 'return':133 'schema':143 'scheme':209 'second':203 'servic':38 'settlement':178 'site':85 'span':97 'specif':46,169 'specifi':185,197 'timeout':200 'unknown':177 'usdc':13,26,60,191 'usdc-settlement' 'use':188,205 'util':106 'valid':135 'verif':2,15,37,174 'version':212 'via':10,23,40,69 'wallet':186 'x402':11,24,42,71,195,211 'x402 KYC' 'x402-payment'","prices":[{"id":"57a228b5-7a81-4c64-a814-368237bc28d3","listingId":"8ec8ac62-3723-44c5-b3f2-1c23e71ae7b4","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/81","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:11.931Z"}],"sources":[{"listingId":"8ec8ac62-3723-44c5-b3f2-1c23e71ae7b4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/kyc/verifications/81","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:11.931Z","lastSeenAt":"2026-04-22T02:30:56.666Z"}],"details":{"listingId":"8ec8ac62-3723-44c5-b3f2-1c23e71ae7b4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/81 \\\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 valid x402 402 challenge with maxAmountRequired of 20000 base units (USDC, 6 decimals = $0.02)","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/81"},{"claim":"The site advertises $0.02 per request across all APIs with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/81"}],"useCases":["Verifying customer identity as part of onboarding flows","Automated KYC checks in Web3 or DeFi applications","Agent-driven compliance verification without pre-registered API keys","On-demand identity verification with per-call micropayments"],"bestFor":["Developers needing keyless, pay-per-use KYC verification","Web3 applications requiring on-chain payment settlement for compliance services","AI agents that need to perform identity checks autonomously"],"notFor":["Bulk KYC processing where per-call pricing is inefficient","Use cases requiring detailed documentation or SLA guarantees","Regulated environments that need audit trails beyond what is documented here"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:16.323Z"},"updatedAt":"2026-04-22T02:30:56.666Z"}}