{"id":"5580d18e-7718-41de-8771-86a6f7af210a","shortId":"Q5fPBw","kind":"x402","title":"Pay-per-call customer data API on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call customer data API on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides premium API access to a customer resource (ID 86) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe specific endpoint `/api/v1/customers/86` appears to be part of a broader platform hosted at lowpaymentfee.com that offers multiple API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced uniformly at $0.02 per request. However, the crawled documentation pages (docs, pricing, README) returned only a wallet-connect prompt with no substantive content, so the exact schema of the customer resource, its input parameters, and response fields remain undocumented.\n\nThe endpoint is live and returns a well-formed 402 challenge with x402 version 1. The payment timeout is 300 seconds. Because there is no OpenAPI spec, no request/response schema documentation, and the crawled pages are effectively empty, the actual functionality behind this specific customer endpoint is unclear — it could be a demo or placeholder resource.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","customer-data","no-api-key"],"categories":["data","payments"],"synonyms":["customer API","x402 endpoint","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","All doc/pricing/README pages return only a wallet-connect prompt with no content","The specific /api/v1/customers/86 endpoint purpose is unclear; may be a demo or placeholder","No examples of successful responses are available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/86","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/customers/86","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 402 challenge, but there is no OpenAPI spec, no request/response schema, and all documentation pages are empty (wallet-connect only). The purpose of the /customers/86 resource is undocumented, making this effectively a stub 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'/request':13,28 '0.02':12,27,73,140 '000':77 '0x8335':67 '1':193 '20':76 '2913':68 '300':198 '402':188 '6':81 '86':44 'Base network API' 'USDC micropayment API' 'accept':51 'access':38 'actual':218 'ai':128 'analyt':127 'api':7,22,37,84,123 'appear':109 'attach':93 'base':9,24,62,78 'behind':220 'broader':115 'call':4,19 'caller':91 'categori':124 'challeng':189 'connect':156 'content':161 'contract':66 'cost':71 'could':228 'crawl':145,212 'custom':5,20,41,168,223 'customer API' 'customer-data' 'data':6,21,126 'decim':82 'demo':231 'doc':148 'document':146,209 'effect':215 'empti':216 'endpoint':32,107,179,224 'exact':164 'field':175 'financ':131 'form':187 'function':219 'header':98 'host':117 'howev':143 'id':43 'includ':125 'infrastructur':134 'input':171 'json':56 'json-api' 'key':85 'learn':130 'limit':88 'live':181 'lowpaymentfee' 'lowpaymentfee.com':34,119 'machin':129 'multipl':122 'network':63 'no-api-key' 'offer':121 'openapi':204 'page':147,213 'paramet':172 'part':112 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':48,57,97,103,195 'per':3,18,74,141 'placehold':233 'platform':116 'post':52 'premium':36 'price':137,149 'prompt':157 'proof':104 'protocol':49 'provid':35 'rate':87 'readm':150 'remain':176 'request':53,75,142 'request/response':207 'requir':90 'resourc':42,169,234 'respons':174 'return':55,151,183 'schema':165,208 'second':199 'settl':59 'simpli':92 'spec':205 'specif':106,222 'substant':160 'timeout':196 'unclear':226 'undocu':177 'uniform':138 'unit':79 'usdc':15,30,65 'usdc-base' 'use':64 'util':135 'valid':101 'version':192 'via':10,25,45 'wallet':155 'wallet-connect':154 'web3':132 'well':186 'well-form':185 'x':96 'x-payment':95 'x402':11,26,47,102,191 'x402 endpoint' 'x402-payment'","prices":[{"id":"eef227e3-8261-43e9-b47d-125b8fedc892","listingId":"5580d18e-7718-41de-8771-86a6f7af210a","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/customers/86","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:24.085Z"}],"sources":[{"listingId":"5580d18e-7718-41de-8771-86a6f7af210a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/86","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:24.085Z","lastSeenAt":"2026-04-25T04:02:27.476Z"}],"details":{"listingId":"5580d18e-7718-41de-8771-86a6f7af210a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/86 \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a 402 challenge with x402 version 1, accepting USDC on Base network with maxAmountRequired of 20000","source_url":"https://lowpaymentfee.com/api/v1/customers/86"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/customers/86"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching customer data with per-request USDC micropayments","Demonstrating x402 payment protocol integration on Base","Agent-driven data retrieval without API key provisioning"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-per-call API access","Low-volume data retrieval where subscription pricing is unnecessary"],"notFor":["High-volume bulk data retrieval (per-request cost adds up)","Use cases requiring detailed API documentation or guaranteed SLAs","Users without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.845Z"},"updatedAt":"2026-04-25T04:02:27.476Z"}}