{"id":"56a3d1f0-55d7-413b-8acd-9c767e052ad1","shortId":"VbGJqD","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC on the Base network with no API keys, no rate limits, and no commitments required.\n\nThe specific resource at `/api/v1/generate/resource/3` accepts HTTP POST requests and returns `application/json` responses. The x402 challenge confirms the endpoint is live, advertising a max amount of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call, settled to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The payment scheme is \"exact,\" meaning the full amount is charged per request with a 300-second timeout.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no description of what \"Premium API Access\" or \"resource/3\" actually returns. The provider's landing page lists many endpoints across diverse domains but provides no detail on inputs, outputs, or underlying data sources. Prospective users should be aware that the actual functionality behind this endpoint is undocumented and unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","http-post"],"categories":["api","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","USDC micropayment API","Base network API","pay-per-call API","resource generation"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI spec or request/response schema provided; the actual functionality of '/api/v1/generate/resource/3' is unknown.","The name 'Premium API Access' and path 'resource/3' give no indication of what data or service is returned.","Multiple endpoint categories (AI, finance, analytics, infrastructure) are advertised but none are documented."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/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/generate/resource/3","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on what the endpoint actually does, no request/response schema, and no examples. The docs pages are empty. This is effectively a stub 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'/request':13,28 '0.02':12,27,73,126 '000':121 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':138 '20':120 '300':156 '6':131 'Base network API' 'USDC micropayment API' 'accept':99 'access':7,22,38,196 'across':209 'actual':199,230 'address':137 'advertis':115 'ai':60 'amount':118,149 'analyt':59 'api':6,21,37,85,165,195 'application/json':105 'awar':227 'base':9,24,81,122,140 'behind':232 'call':4,19,134 'categori':56 'challeng':109 'charg':151 'commit':92 'confirm':110 'connect':174 'content':180 'data':58,221 'decim':132 'descript':191 'detail':215 'divers':210 'doc':164 'document':159 'domain':211 'endpoint':32,49,69,112,208,234 'exact':145 'extrem':161 'financ':63 'full':148 'function':231 'http':100 'http-post' 'includ':57 'infrastructur':66 'input':217 'json-response' 'key':86 'land':204 'learn':62 'limit':89 'list':206 'live':114 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':61 'mani':48,207 'max':117 'mean':146 'network':82 'offer':50 'one':46 'openapi':184 'output':218 'page':169,205 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':76 'payment':42,142 'per':3,18,74,133,152 'post':101 'premium':5,20,36,194 'price':71,166 'prompt':176 'prospect':223 'protocol':43 'provid':35,53,202,213 'rate':88 'readm':168 'render':171 'request':75,102,153 'request/response':187 'requir':93 'resourc':96 'resource generation' 'resource/3':198 'respons':106 'return':104,200 'schema':188 'scheme':143 'second':157 'settl':135 'sinc':128 'sourc':222 'span':55 'spars':162 'spec':185 'specif':95 'timeout':158 'unclear':238 'under':220 'undocu':236 'unit':123 'usd':127 'usdc':15,30,78,125,129 'usdc-base' 'use':130 'user':224 'util':67 'via':10,25,39 'wallet':175 'web3':64 'x402':11,26,41,108 'x402 premium API' 'x402-payment'","prices":[{"id":"919cd79f-3ee8-4071-a202-e2d45c083432","listingId":"56a3d1f0-55d7-413b-8acd-9c767e052ad1","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/generate/resource/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":"2026-04-18T18:37:07.731Z"}],"sources":[{"listingId":"56a3d1f0-55d7-413b-8acd-9c767e052ad1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/3","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:07.731Z","lastSeenAt":"2026-04-22T23:01:00.383Z"}],"details":{"listingId":"56a3d1f0-55d7-413b-8acd-9c767e052ad1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/3 \\\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":"Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/3"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Provider offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a generation endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment flows","Agents needing keyless API access with crypto micropayments","Low-volume, on-demand API consumption without subscriptions"],"notFor":["Users who need documented request/response schemas before integrating","High-volume production workloads requiring SLAs or support","Anyone who needs to understand exactly what data the endpoint returns before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:45.849Z"},"updatedAt":"2026-04-22T23:01:00.383Z"}}