{"id":"c34da509-0cfc-4743-a888-024792a6b17b","shortId":"Fy6c9z","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, paying $0.02 per request in USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, paying $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides x402-protocol access to a Stripe invoice resource (`/api/v1/stripe/invoices/99`). It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utility categories — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint probed (`/api/v1/stripe/invoices/99`) returns a valid x402 challenge (HTTP 402) requesting payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals → $0.02) via the \"exact\" scheme. Payment is directed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The response MIME type is `application/json` and the method is POST.\n\nDocumentation on the site is extremely thin — 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 explanation of what data the `/stripe/invoices/99` endpoint actually returns. The landing page lists many other endpoints but does not include this specific Stripe invoices path, so its purpose and payload remain unclear. Treat this listing as a stub until richer documentation becomes available.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","stripe-invoices","json-response"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid API","USDC micropayment API","Base network API","pay-per-call endpoint","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available for this endpoint","Docs, API, pricing, and README pages all render only 'Connect wallet' with no content","The /api/v1/stripe/invoices/99 path is not listed among the site's advertised endpoints — its purpose is unclear","No request body schema or response examples are provided anywhere"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/99","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/99","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a well-formed x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific /stripe/invoices/99 path is not listed on the landing page. The actual functionality and response payload are 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'/stripe/invoices/99':175 '0.02':10,24,70,108 '000':97 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':118 '0x8335':102 '20':96 '2913':103 '300':121 '402':92 '6':106 'Base network API' 'USDC micropayment API' 'access':37 'across':57 'actual':177 'address':117 'ai/ml':60 'analyt':59 'api':56,144 'application/json':129 'avail':212 'base':8,22,79,98,105 'becom':211 'broader':49 'call':55 'categori':66 'challeng':90 'connect':153 'content':159 'data':58,173 'decim':107 'direct':115 'doc':143 'document':135,210 'endpoint':6,20,30,83,176,185 'exact':111 'explan':170 'extrem':140 'finance/web3':62 'gate':3,17 'http':91 'includ':189 'infer':61 'infrastructur':64 'invoic':5,19,41,193 'json-response' 'land':180 'list':182,204 'lowpaymentfee' 'lowpaymentfee.com':32 'mani':183 'method':132 'mime':126 'network':80 'offer':51 'openapi':163 'page':148,181 'part':46 'path':194 'pay':9,23,53 'pay-per-cal':52 'pay-per-call endpoint' 'pay-per-request' 'payload':199 'payment':94,113 'per':11,25,54,71 'platform':50 'post':134 'price':68,145 'probe':84 'prompt':155 'protocol':36 'provid':33 'purpos':197 'readm':147 'remain':200 'render':150 'request':12,26,72,93 'request/response':166 'resourc':42 'respons':125 'return':86,178 'richer':209 'schema':167 'scheme':112 'second':122 'settl':74 'site':138 'spec':164 'specif':82,191 'stripe':4,18,40,192 'stripe invoice API' 'stripe-invoices' 'stub':207 'thin':141 'timeout':123 'treat':202 'type':127 'unclear':201 'unit':99 'usdc':14,28,76,101 'usdc-base' 'util':65 'valid':88 'via':109 'wallet':154 'x402':2,16,35,89 'x402 paid API' 'x402-gated':1,15 'x402-payment' 'x402-protocol':34","prices":[{"id":"3d1109af-e8f8-491d-985f-3522291b154a","listingId":"c34da509-0cfc-4743-a888-024792a6b17b","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/99","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:19.849Z"}],"sources":[{"listingId":"c34da509-0cfc-4743-a888-024792a6b17b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/99","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:19.849Z","lastSeenAt":"2026-04-25T04:32:53.797Z"}],"details":{"listingId":"c34da509-0cfc-4743-a888-024792a6b17b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/99 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/99"},{"claim":"The platform advertises $0.02 per request pricing 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/99"}],"useCases":["Retrieving Stripe invoice data via a single paid API call","Programmatic access to invoice records without API key management","Agent-driven invoice lookups settled in USDC on Base"],"bestFor":["Agents or bots that need keyless, pay-per-call access to invoice data","Developers who prefer crypto micropayments over subscription billing","Workflows requiring on-demand Stripe invoice retrieval"],"notFor":["Users needing detailed API documentation or request/response schemas before integrating","High-volume batch invoice processing where per-call pricing is inefficient","Anyone requiring non-crypto payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.97Z"},"updatedAt":"2026-04-25T04:32:53.797Z"}}