{"id":"6dea2fe8-68e9-4d55-8ed8-c00e97d231ce","shortId":"EAgb5c","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/90`. It uses the x402 payment protocol, accepting USDC on the Base network. The price per request is $0.02 (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof to access the endpoint.\n\nThe broader lowpaymentfee.com platform advertises a range of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02/request pricing model and settle on the Base network using USDC.\n\nDocumentation is extremely sparse. The crawled /docs, /api, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the KYC verification endpoint actually accepts or returns. The endpoint path includes an ID segment (`/90`) whose meaning is unclear — it may represent a specific verification type or a resource identifier. Callers should expect to POST JSON but will need to experiment or contact the provider to determine the required request body and response format.","tags":[],"capabilities":["kyc-verification","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["identity","compliance"],"synonyms":["KYC API","identity verification","know your customer","compliance check","ID verification","x402 KYC","onchain KYC"],"warnings":["No documentation available — /docs, /api, /pricing, and /README all return only a wallet-connect prompt","No OpenAPI or request/response schema provided; request body and response format are unknown","The path segment '/90' is unexplained — unclear if it's a verification type ID or resource identifier","KYC/identity verification is a regulated category; verify the provider's compliance posture before use"],"endpointUrl":"https://lowpaymentfee.com/api/v1/kyc/verifications/90","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/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation, no request/response examples, and the purpose of the '/90' path segment is unknown. The docs pages are all empty wallet-connect stubs. This is effectively a stub 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'/api':159 '/api/v1/kyc/verifications/90':41 '/docs':158 '/pricing':160 '/readme':162 '/request':141 '0.02':59,140 '000':61 '20':60 '6':67 'ID verification' 'KYC API' 'accept':48,193 'access':39,92 'actual':192 'advertis':99 'ai/ml':111 'analysi':114 'analyt':110 'api':70,107 'attach':79 'base':5,18,52,62,148 'base-network' 'bodi':239 'broader':96 'call':9,22,106 'caller':77,219 'classif':116 'compliance check' 'connect':168 'contact':231 'content':174 'convers':133 'crawl':157 'custom':36 'data':109,119 'decim':68 'descript':185 'determin':235 'document':152 'embed':117 'endpoint':3,16,28,94,136,191,197 'estim':127 'exampl':182 'exchang':122 'expect':221 'experi':229 'extrem':154 'feed':121 'finance/web3':118 'format':242 'gas':126 'generat':134 'geocod':131 'header':84 'id':201 'identifi':218 'identity verification' 'includ':199 'infer':112 'infrastructur':129 'json':224 'key':71 'know':34 'know your customer' 'kyc':1,14,33,189 'kyc-verification' 'limit':74 'lowpaymentfee.com':30,97 'may':209 'mean':205 'model':143 'need':227 'network':53,149 'no-api-key' 'onchain KYC' 'openapi':178 'page':163 'paid':6,19 'path':198 'pay':104 'pay-per-cal':103 'pay-per-call' 'payment':46,83,89 'per':8,21,56,105 'per-cal':7,20 'platform':98 'post':223 'price':55,120,142 'prompt':170 'proof':90 'protocol':47 'provid':31,233 'quot':125 'rang':101 'rate':73,123 'repres':210 'request':57,238 'request/response':181 'requir':76,237 'resourc':217 'respons':241 'return':165,195 'schema':179 'segment':202 'sentiment':113 'servic':38 'settl':145 'share':137 'simpli':78 'span':108 'spars':155 'specif':212 'substant':173 'summar':115 'token':124 'type':214 'unclear':207 'unit':63 'usdc':13,26,49,65,151 'usdc-settlement' 'use':43,150 'util':130 'valid':87,132 'verif':2,15,37,190,213 'via':10,23 'wallet':169 'whose':204 'x':82 'x-payment':81 'x402':11,24,45,88 'x402 KYC' 'x402-payment'","prices":[{"id":"66ace62e-2b9f-4eb2-9b7e-9b6ef2d4a21a","listingId":"6dea2fe8-68e9-4d55-8ed8-c00e97d231ce","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/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:47:14.951Z"}],"sources":[{"listingId":"6dea2fe8-68e9-4d55-8ed8-c00e97d231ce","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/kyc/verifications/90","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:47:14.951Z","lastSeenAt":"2026-04-22T01:01:05.609Z"}],"details":{"listingId":"6dea2fe8-68e9-4d55-8ed8-c00e97d231ce","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/kyc/verifications/90 \\\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 x402 challenge with maxAmountRequired of 20000 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/90"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/kyc/verifications/90"}],"useCases":["Verifying user identity as part of onboarding flows","Compliance checks for financial or Web3 applications","Automated KYC screening triggered by agent workflows"],"bestFor":["Developers needing pay-per-call KYC without subscription commitments","Agent-based workflows that can settle payments in USDC on Base","Applications requiring keyless, instant-access identity verification"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume KYC pipelines requiring bulk pricing or dedicated support","Scenarios requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:16.234Z"},"updatedAt":"2026-04-22T01:01:05.609Z"}}