{"id":"6d31c1b2-9fd2-49d3-a500-0ca0c20ca543","shortId":"LjqSme","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides x402-protocol access to a Stripe invoice resource (invoice ID 117). It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML inference, finance, and utility categories — all gated behind x402 payment challenges settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/invoices/117` is labeled \"Premium API Access\" and accepts POST requests. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request given USDC's 6 decimal places. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised; access is purely payment-gated.\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 data the invoice endpoint actually returns. The platform's landing page lists many other endpoints (analytics, AI, finance, utilities) at the same $0.02 price point, but none have documented schemas or sample payloads. The endpoint is confirmed live via a valid 402 challenge response.","tags":[],"capabilities":["x402-payment-gated","usdc-base-settlement","stripe-invoice-access","pay-per-request","no-api-key-required"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 payment API","USDC micropayment endpoint","pay-per-call API","Base network API","lowpaymentfee","crypto-gated API"],"warnings":["No OpenAPI or schema documentation available — request body and response format are completely unknown.","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content.","The specific purpose of /api/v1/stripe/invoices/117 is unclear — it may be a demo or placeholder endpoint.","No information on what data is returned or what POST body is expected."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/117","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/117","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response documentation, no examples, and the docs pages are empty stubs. The purpose of this specific invoice endpoint is unclear beyond its 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'0.02':10,24,113,204 '000':103 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':127 '0x8335':108 '117':45 '20':102 '300':130 '402':223 '6':119 'Base network API' 'USDC micropayment endpoint' 'accept':91 'access':37,89,141 'across':59 'actual':186 'address':126 'advertis':97,140 'ai':198 'ai/ml':62 'analyt':61,197 'api':58,88,134,153 'base':8,22,79,104,110 'behind':70 'broader':51 'categori':67 'challeng':73,96,224 'confirm':218 'connect':162 'content':168 'cost':100 'crypto-gated API' 'data':60,182 'decim':120 'descript':179 'doc':152 'document':147,210 'endpoint':6,20,30,83,185,196,216 'equal':112 'exampl':176 'extrem':149 'financ':64,199 'gate':3,17,69,146 'given':116 'id':44 'infer':63 'invoic':5,19,41,43,184 'key':135 'label':86 'land':191 'limit':138 'list':193 'live':219 'lowpaymentfee' 'lowpaymentfee.com':32 'mani':194 'maximum':99 'network':80 'no-api-key-required' 'none':208 'offer':53 'openapi':172 'page':157,192 'part':48 'pay':9,23,55 'pay-per-call API' 'pay-per-request':54 'payload':214 'payment':72,122,145 'payment-g':144 'per':11,25,56,114 'place':121 'platform':52,189 'point':206 'post':92 'premium':87 'price':154,205 'prompt':164 'protocol':36 'provid':33 'pure':143 'rate':137 'readm':156 'render':159 'request':12,26,57,93,115 'request/response':175 'resourc':42 'respons':225 'return':187 'sampl':213 'schema':173,211 'second':131 'sent':124 'settl':74 'spars':150 'specif':82 'stripe':4,18,40 'stripe invoice API' 'stripe-invoice-access' 'substant':167 'timeout':132 'unit':105 'usdc':14,28,76,107,117 'usdc-base-settlement' 'util':66,200 'valid':222 'via':220 'wallet':163 'x402':2,16,35,71,95 'x402 payment API' 'x402-gated':1,15 'x402-payment-gated' 'x402-protocol':34","prices":[{"id":"33daba66-0a7a-4379-8a0d-33e4d9bfab3a","listingId":"6d31c1b2-9fd2-49d3-a500-0ca0c20ca543","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/117","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:24.091Z"}],"sources":[{"listingId":"6d31c1b2-9fd2-49d3-a500-0ca0c20ca543","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/117","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:24.091Z","lastSeenAt":"2026-04-25T16:03:44.509Z"}],"details":{"listingId":"6d31c1b2-9fd2-49d3-a500-0ca0c20ca543","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/117 \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/117"},{"claim":"Platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/117"},{"claim":"Payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/117"}],"useCases":["Retrieving Stripe invoice data without traditional API key authentication","Programmatic access to invoice records via crypto micropayments","Agent-driven invoice lookups settled in USDC on Base"],"bestFor":["Developers wanting keyless, pay-per-use access to Stripe invoice data","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Anyone needing documented request/response schemas before integrating","Bulk invoice retrieval at scale (no batch endpoint documented)","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:52.606Z"},"updatedAt":"2026-04-25T16:03:44.509Z"}}