{"id":"a62de837-01c8-4ae1-ba27-184799021c1b","shortId":"UUuEkA","kind":"x402","title":"Pay-per-call premium API access via x402 on Base network, settled in USDC at $0.02/request.","tagline":"Pay-per-call premium API access via x402 on Base network, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility services. All endpoints share a uniform pricing model of $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/stripe/invoices/102` accepts POST requests and returns JSON. The x402 challenge confirms it is live, advertising a maxAmountRequired of 20000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme to the specified payTo address, with a 300-second timeout.\n\nDocumentation on the site is minimal — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt, suggesting the platform is wallet-gated for detailed documentation. No OpenAPI spec, request/response schemas, or usage examples are publicly available beyond the landing page listing.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 premium endpoint","pay-per-call API","USDC micropayment API","lowpaymentfee","Base network API"],"warnings":["No public documentation available — docs/pricing/README pages are wallet-gated","No request or response schema provided; actual functionality of /stripe/invoices/102 is unknown","Purpose of this specific endpoint is ambiguous — 'Premium API Access' is generic"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/102","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/stripe/invoices/102","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page, and no examples of what the endpoint actually returns. The purpose of 'stripe/invoices/102' is 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'/request':18,36 '0.02':17,35,81,134 '0x8335':128 '20000':123 '2913':129 '300':155 '6':138 'Base network API' 'USDC micropayment API' 'accept':106 'access':7,25,44 'address':152 'advertis':119 'ai':64 'analyt':63 'api':6,24,43,93,166 'avail':198 'base':11,29,89,124,131 'beyond':199 'call':4,22 'challeng':114 'commit':100 'confirm':115 'connect':175 'data':62 'decim':139 'detail':186 'doc':165 'document':158,187 'endpoint':38,55,74,104 'equal':133 'exact':146 'exampl':195 'financ':67 'gate':184 'given':135 'infrastructur':70 'json':111 'json-response' 'key':94 'land':201 'learn':66 'limit':97 'list':203 'live':118 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':65 'made':142 'mani':54 'maxamountrequir':121 'minim':163 'model':79 'network':12,30,90 'no-api-key' 'offer':56 'one':52 'openapi':189 'page':170,202 'paid':84 'pay':2,20 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request' 'payment':48,140 'payto':151 'per':3,21,82 'platform':59,180 'post':107 'post-method' 'premium':5,23,42 'price':78,167 'prompt':177 'protocol':49 'provid':41 'public':197 'rate':96 'readm':169 'render':172 'request':83,108 'request/response':191 'requir':101 'return':110 'schema':192 'scheme':147 'second':156 'servic':72 'settl':13,31 'share':75 'site':161 'span':61 'spec':190 'specif':103 'specifi':150 'stripe invoice API' 'suggest':178 'timeout':157 'uniform':77 'unit':125 'usag':194 'usdc':15,33,86,127,136 'usdc-base-network' 'util':71 'via':8,26,45,143 'wallet':176,183 'wallet-g':182 'web3':68 'x402':9,27,47,113,145 'x402 premium endpoint' 'x402-payment'","prices":[{"id":"80620726-dee1-4e03-875a-ac38b3ec04a8","listingId":"a62de837-01c8-4ae1-ba27-184799021c1b","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/stripe/invoices/102","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:28.877Z"}],"sources":[{"listingId":"a62de837-01c8-4ae1-ba27-184799021c1b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/102","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:28.877Z","lastSeenAt":"2026-04-25T16:03:44.634Z"}],"details":{"listingId":"a62de837-01c8-4ae1-ba27-184799021c1b","quickStartSnippet":"# 1. Send POST with X-PAYMENT header containing x402 payment proof\ncurl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/102 \\\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":"All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge confirms live status with maxAmountRequired of 20000 base units USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/102"}],"useCases":["Accessing premium API data without subscription or API key management","Making one-off paid API calls settled instantly in USDC on Base","Integrating pay-per-use endpoints into autonomous agent workflows"],"bestFor":["Developers wanting zero-commitment pay-per-call API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over traditional billing"],"notFor":["Users without a Base-network USDC wallet","Applications requiring detailed public API documentation before integration","High-volume use cases where per-request pricing may be cost-inefficient compared to subscriptions"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:52.433Z"},"updatedAt":"2026-04-25T16:03:44.634Z"}}