{"id":"4039ce93-8c2f-4948-8585-be86aeadac40","shortId":"ZZ5Kyc","kind":"x402","title":"Pay-per-call premium API access via x402 on Base network using USDC at $0.02/request.","tagline":"Pay-per-call premium API access via x402 on Base network using USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific endpoint `/api/v1/apikeys/32` is one of many API endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities.\n\nThe platform operates on a simple pay-per-request model at $0.02 per call, settled in USDC on the Base network. There are no API keys required, no rate limits advertised, and no subscription commitments — callers simply attach an x402 payment header to each request. The x402 challenge confirms the endpoint is live, accepting payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a max amount of 20,000 base units of USDC (i.e., $0.02 given 6 decimals).\n\nDocumentation is extremely sparse — the docs, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/apikeys/32` endpoint specifically returns. The endpoint name suggests it may provision or retrieve an API key resource, but this is speculative.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key-required"],"categories":["infrastructure","api-access"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","micropayment API","lowpaymentfee"],"warnings":["No API documentation available — docs/pricing/README pages only show 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The specific function of /api/v1/apikeys/32 is unclear — may be an API key provisioning endpoint but this is unconfirmed","No examples of successful responses available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/apikeys/32","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/apikeys/32","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of the /api/v1/apikeys/32 endpoint is unclear. The docs pages are empty beyond a wallet connect 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'/request':17,34 '0.02':16,33,88,147 '000':141 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':134 '20':140 '6':149 'Base network API' 'USDC API access' 'accept':130 'access':7,24,42 'address':133 'advertis':107 'ai':68 'amount':138 'analyt':67 'api':6,23,41,56,101,201 'attach':114 'base':11,28,96,142 'base-network' 'call':4,21,90 'caller':112 'categori':64 'challeng':124 'commit':111 'confirm':125 'connect':165 'data':66 'decim':150 'descript':183 'detail':172 'doc':156 'document':151 'endpoint':36,50,57,127,188,192 'exampl':180 'extrem':153 'financ':71 'given':148 'header':118 'i.e':146 'includ':65 'infrastructur':74 'key':102,202 'learn':70 'limit':106 'live':129 'lowpaymentfee' 'lowpaymentfee.com':38 'machin':69 'mani':55 'max':137 'may':196 'micropayment API' 'model':86 'name':193 'network':12,29,97 'no-api-key-required' 'offer':58 'one':53 'openapi':176 'oper':78 'page':160 'pay':2,19,83 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request':82 'payment':46,117,131 'per':3,20,84,89 'platform':61,77 'premium':5,22,40 'price':157 'prompt':167 'protocol':47 'provid':39 'provis':197 'rate':105 'readm':159 'render':162 'request':85,121 'request/response':179 'requir':103 'resourc':203 'retriev':199 'return':190 'schema':177 'settl':91 'simpl':81 'simpli':113 'span':63 'spars':154 'specif':49,189 'specul':207 'subscript':110 'suggest':194 'technic':171 'unit':143 'usdc':14,31,93,145 'usdc-settlement' 'use':13,30 'util':75 'via':8,25,43 'wallet':166 'web3':72 'x402':9,26,45,116,123 'x402 API' 'x402-payment'","prices":[{"id":"237d1a11-892c-4445-8b29-53dc5e41fe40","listingId":"4039ce93-8c2f-4948-8585-be86aeadac40","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/apikeys/32","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:28.999Z"}],"sources":[{"listingId":"4039ce93-8c2f-4948-8585-be86aeadac40","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/apikeys/32","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:28.999Z","lastSeenAt":"2026-04-23T08:02:07.665Z"}],"details":{"listingId":"4039ce93-8c2f-4948-8585-be86aeadac40","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/apikeys/32 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Platform charges $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge confirms live endpoint accepting USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with maxAmountRequired of 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/apikeys/32"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to premium API resources without subscription","Agent-driven API consumption with per-request crypto payments","Accessing data, AI, finance, or utility endpoints on a pay-as-you-go basis"],"bestFor":["Agents or developers wanting no-commitment API access","Crypto-native applications that can settle payments on Base","Low-volume or sporadic API consumers who prefer per-call pricing"],"notFor":["Users who need detailed API documentation before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Developers without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:29.2Z"},"updatedAt":"2026-04-23T08:02:07.665Z"}}