{"id":"bb309f9b-20d2-4558-adb2-88c6e24e1fbb","shortId":"QUVdbc","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, paying $0.02 in USDC per request.","tagline":"x402-gated Stripe invoice endpoint on Base, paying $0.02 in USDC per request.","description":"This endpoint at lowpaymentfee.com exposes a specific Stripe invoice resource (`/api/v1/stripe/invoices/149`) behind an x402 payment wall. It is part of a broader platform that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the \"exact\" scheme to a specified wallet address, with the asset being USDC (contract `0x8335…2913` on Base). The maxAmountRequired of 20,000 base units corresponds to $0.02 (USDC uses 6 decimals). No API keys or rate limits are advertised; access is granted purely through the x402 payment header.\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 documentation, and no description of what the `/stripe/invoices/149` endpoint actually returns beyond the generic label \"Premium API Access\". The specific behavior of this invoice endpoint (whether it creates, retrieves, or processes a Stripe invoice) cannot be determined from available materials.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","stripe-invoice","no-api-key","no-rate-limit"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content","No OpenAPI or schema describing request body or response format for this endpoint","The specific purpose of /api/v1/stripe/invoices/149 ('Premium API Access') is unclear — it may be a demo or placeholder","No robots.txt or agents.txt present"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/149","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/149","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 captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on request parameters, response format, or what this specific invoice endpoint does. No OpenAPI spec, no examples, and all doc pages are empty wallet-connect 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'/api/v1/stripe/invoices/149':39 '/docs':156 '/pricing':158 '/readme':160 '/stripe/invoices/149':188 '0.02':10,24,75,129 '000':124 '0x8335':116 '20':123 '2913':117 '6':132 'Base network API' 'USDC micropayment API' 'accept':95 'access':142,198 'actual':190 'address':109 'advertis':141 'ai/ml':65 'analyt':64 'api':60,135,197 'asset':112 'avail':219 'base':8,22,84,119,125 'behavior':201 'behind':40 'beyond':192 'broader':50 'call':59 'cannot':215 'challeng':88 'confirm':89 'connect':166 'content':172 'contract':115 'correspond':127 'creat':208 'data':63,68 'decim':133 'descript':184 'determin':217 'document':151,181 'dozen':54 'endpoint':6,20,30,61,91,189,205 'exact':103 'expos':33 'extrem':153 'finance/web3':67 'gate':3,17 'generic':194 'grant':144 'header':150 'infer':66 'invoic':5,19,37,204,214 'key':136 'label':195 'limit':139 'live':93 'lowpaymentfee' 'lowpaymentfee.com':32 'made':100 'materi':220 'maxamountrequir':121 'network':85 'no-api-key' 'no-rate-limit' 'offer':53 'openapi':176 'page':161 'part':47 'pay':9,23,57 'pay-per-cal':56 'pay-per-call API' 'pay-per-request' 'payment':43,98,149 'per':13,27,58,76 'platform':51 'post':96 'premium':196 'price':73 'process':211 'prompt':168 'pure':145 'rate':138 'render':163 'request':14,28,77,97 'request/response':179 'resourc':38 'retriev':209 'return':191 'schema':180 'scheme':104 'servic':71 'settl':79 'span':62 'spars':154 'spec':177 'specif':35,200 'specifi':107 'stripe':4,18,36,213 'stripe invoice API' 'stripe-invoice' 'unit':126 'usdc':12,26,81,114,130 'usdc-base' 'use':131 'util':70 'via':101 'wall':44 'wallet':108,167 'whether':206 'x402':2,16,42,87,148 'x402 paid endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"a0e5ee49-a632-4132-988f-4288b09e4581","listingId":"bb309f9b-20d2-4558-adb2-88c6e24e1fbb","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/149","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:34.922Z"}],"sources":[{"listingId":"bb309f9b-20d2-4558-adb2-88c6e24e1fbb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/149","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:34.922Z","lastSeenAt":"2026-04-25T14:32:46.839Z"}],"details":{"listingId":"bb309f9b-20d2-4558-adb2-88c6e24e1fbb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/149 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","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 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/149"},{"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":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/149"}],"useCases":["Retrieving or processing a Stripe invoice via a single paid API call","Agent-driven invoice workflows that settle payment in USDC on Base","Programmatic access to Stripe invoice data without traditional API key management"],"bestFor":["Agents or services that can settle USDC payments on Base L2","Developers wanting key-less, pay-per-use access to invoice data","Exploring x402 protocol integrations with Stripe-related endpoints"],"notFor":["Users needing detailed API documentation or response schemas before integrating","High-volume invoice processing where per-request fees add up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:52.095Z"},"updatedAt":"2026-04-25T14:32:46.839Z"}}