{"id":"7d3272a5-13e0-4536-ad9a-8d3a4241a7df","shortId":"8z85Rf","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com exposes a specific Stripe invoice resource (`/api/v1/stripe/invoices/155`) behind an x402 paywall. The provider operates a broader platform offering dozens of pay-per-request API endpoints across data analytics, AI/ML inference, finance, and utility categories, all settled on the Base network using USDC via the x402 protocol.\n\nThe specific endpoint listed here is described as \"Premium API Access\" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC with 6 decimals). Payment is made in USDC on Base to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The endpoint accepts POST requests and returns `application/json`. The x402 challenge was successfully captured, confirming the endpoint is live.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the Stripe invoice endpoint actually returns or what input it expects beyond a POST body. The provider's landing page lists the platform's general pricing model ($0.02/request, no API keys, no rate limits, instant access) but provides no detail about this specific invoice resource.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoice","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid API","USDC micropayment API","pay-per-call endpoint","Base network API","lowpaymentfee","crypto-gated API"],"warnings":["No OpenAPI or request/response schema available — input format for POST body is unknown","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content","The specific purpose of /api/v1/stripe/invoices/155 is unclear — 'Premium API Access' is generic","No examples of successful responses exist in the crawl material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/155","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/155","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint exists and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually returns. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':201 '0.02':95,200 '000':101 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':118 '20':100 '6':107 'Base network API' 'USDC micropayment API' 'accept':121 'access':90,209 'across':59 'actual':177 'address':117 'ai/ml':62 'analyt':61 'api':57,89,144,203 'application/json':126 'base':8,22,72,102,115 'base-network' 'behind':40 'beyond':184 'bodi':187 'broader':48 'call':12,26 'captur':132 'categori':67 'challeng':129 'confirm':133 'connect':153 'content':159 'cost':92 'crypto-gated API' 'data':60 'decim':108 'describ':86 'descript':170 'detail':213 'doc':143 'document':138 'dozen':51 'endpoint':6,20,30,58,82,120,135,176 'exampl':167 'expect':183 'expos':33 'extrem':140 'financ':64 'gate':3,17 'general':197 'infer':63 'input':181 'instant':208 'invoic':5,19,37,175,217 'json-response' 'key':204 'land':191 'limit':207 'list':83,193 'live':137 'lowpaymentfee' 'lowpaymentfee.com':32 'made':111 'maxamountrequir':98 'model':199 'network':73 'no-api-key' 'offer':50 'openapi':163 'oper':46 'page':148,192 'paid':9,23 'pay':54 'pay-per-call endpoint' 'pay-per-request':53 'payment':109 'paywal':43 'per':11,25,55,96 'per-cal':10,24 'platform':49,195 'post':122,186 'premium':88 'price':145,198 'prompt':155 'protocol':79 'provid':45,189,211 'rate':206 'readm':147 'render':150 'request':56,97,123 'request/response':166 'resourc':38,218 'return':125,178 'schema':164 'settl':69 'spars':141 'specif':35,81,216 'stripe':4,18,36,174 'stripe invoice API' 'stripe-invoice' 'substant':158 'success':131 'unit':103 'usdc':14,28,75,105,113 'usdc-settlement' 'use':74 'util':66 'via':76 'wallet':154 'x402':2,16,42,78,128 'x402 paid API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"d70df544-03a4-45d2-a929-d63bb2cd556b","listingId":"7d3272a5-13e0-4536-ad9a-8d3a4241a7df","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/155","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:39.048Z"}],"sources":[{"listingId":"7d3272a5-13e0-4536-ad9a-8d3a4241a7df","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/155","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:39.048Z","lastSeenAt":"2026-04-25T13:03:04.169Z"}],"details":{"listingId":"7d3272a5-13e0-4536-ad9a-8d3a4241a7df","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/155 \\\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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/155"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/155"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The provider offers endpoints across data analytics, AI/ML, finance, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving Stripe invoice data via a single paid API call","Programmatic access to invoice #155 without traditional API key management","Agent-driven payment-gated data retrieval on Base"],"bestFor":["Developers experimenting with x402 payment-gated APIs","Agents that can settle USDC payments on Base automatically","Users who want keyless, pay-per-use API access"],"notFor":["Production use requiring documented request/response schemas","Bulk invoice retrieval or batch operations","Users who need fiat-only payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.923Z"},"updatedAt":"2026-04-25T13:03:04.169Z"}}