{"id":"4d90f25f-1bc9-40a2-ab09-5a9eaa5dd3e0","shortId":"EsF2Pv","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 route `/api/v1/kyc/verifications/3` accepts POST requests and charges up to $0.02 per call in USDC on the Base network. No API keys or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe broader lowpaymentfee.com platform hosts a variety of pay-per-request APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance and crypto market data, and infrastructure utilities. All endpoints share the same $0.02/request pricing model settled in USDC on Base. However, the specific KYC verification endpoint's input schema, required fields, and response format are not documented in any crawled material, so the exact verification capabilities and data returned remain unclear.\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) with version 1 of the protocol. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base, with a maximum timeout of 300 seconds.","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","customer verification","AML screening"],"warnings":["No request or response schema documented — input fields for KYC verification are unknown","Documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no actual content","The specific nature of 'verifications/3' (what the '3' refers to) is unexplained","No compliance certifications or data handling policies are documented for a KYC/identity service"],"endpointUrl":"https://lowpaymentfee.com/api/v1/kyc/verifications/3","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/3","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 challenge, but there is no documentation on request/response schemas, no OpenAPI spec, and the crawled docs pages are empty stubs. The KYC verification functionality cannot be verified beyond the URL path 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'/request':120 '0.02':56,119 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':182 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':185 '1':173 '300':193 '402':170 'AML screening' 'ID verification' 'KYC check' 'accept':49 'access':39 'address':181 'ai/ml':99 'analysi':102 'analyt':98 'api':66,95 'attach':75 'base':5,18,63,127,187 'base-network' 'broader':84 'call':9,22,58 'caller':73 'capabl':153 'challeng':168 'charg':53 'classif':104 'compliance check' 'crawl':147 'crypto':108 'custom':36 'customer verification' 'data':97,110,155 'document':144 'embed':105 'endpoint':3,16,28,115,133,160 'exact':151 'field':138 'financ':106 'format':141 'header':79 'host':87 'howev':128 'http':169 'identity verification' 'infer':100 'infrastructur':112 'input':135 'key':67 'know':34 'know your customer' 'kyc':1,14,33,131 'kyc-verification' 'limit':70 'live':162 'lowpaymentfee.com':30,85 'made':179 'market':109 'materi':148 'maximum':190 'model':122 'network':64 'no-api-key' 'pay':7,20,92 'pay-per-cal':6,19 'pay-per-request':91 'payment':43,78,177 'per':8,21,57,93 'platform':86 'post':50 'price':121 'protocol':44,176 'provid':31 'rate':69 'remain':157 'request':51,82,94 'requir':72,137 'respons':140 'return':156,164 'rout':47 'schema':136 'second':194 'sentiment':101 'servic':38 'settl':123 'share':116 'simpli':74 'span':96 'specif':46,130 'summar':103 'timeout':191 'unclear':158 'usdc':13,26,60,125,184 'usdc-settlement' 'use':183 'util':113 'valid':166 'varieti':89 'verif':2,15,37,132,152 'version':172 'via':10,23,40 'x402':11,24,42,77,167 'x402-payment'","prices":[{"id":"7f66d455-4a97-4a79-beac-e0bcfc277dcb","listingId":"4d90f25f-1bc9-40a2-ab09-5a9eaa5dd3e0","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/3","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:02.361Z"}],"sources":[{"listingId":"4d90f25f-1bc9-40a2-ab09-5a9eaa5dd3e0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/kyc/verifications/3","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:02.361Z","lastSeenAt":"2026-04-22T05:31:08.376Z"}],"details":{"listingId":"4d90f25f-1bc9-40a2-ab09-5a9eaa5dd3e0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/3 \\\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":"Endpoint returns HTTP 402 with x402 version 1 challenge requesting USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/3"},{"claim":"Max amount required is 20000 base units of USDC (6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/3"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/3"}],"useCases":["Verifying customer identity as part of onboarding flows","Performing KYC checks without managing API key subscriptions","Integrating identity verification into agent-driven workflows","Adding compliance checks to Web3 or DeFi applications"],"bestFor":["Developers needing low-friction KYC verification without signup","AI agents that can settle payments on Base via x402","Applications requiring pay-as-you-go identity checks"],"notFor":["High-volume KYC pipelines where per-request pricing may add up versus bulk plans","Use cases requiring detailed documentation or SLA guarantees (docs are minimal)","Regulated environments requiring auditable vendor certifications (no compliance info available)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:16.805Z"},"updatedAt":"2026-04-22T05:31:08.376Z"}}