{"id":"18934a56-2c4e-40b8-bcd7-dbd3198d3eae","shortId":"UtcZbW","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 provides access to a Stripe invoice resource (invoice ID 32) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/invoices/32` is labeled \"Premium API Access\" by the provider. The x402 challenge confirms it accepts POST requests, requires an exact payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals → $0.02), and responds with `application/json`. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI spec, no request/response schema beyond the x402 output schema stub, and no description of what data the invoice endpoint actually returns. The platform advertises no API keys, no rate limits, and instant access, but the actual functionality of this particular endpoint is unclear from available materials.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","stripe-invoices","json-response","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid API","USDC micropayment endpoint","Base network API","pay-per-call invoice","lowpaymentfee"],"warnings":["No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No request body schema or response schema documented","The specific purpose of /api/v1/stripe/invoices/32 ('Premium API Access') is unclear — it may be a demo or placeholder","No OpenAPI or ai-plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/32","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/32","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 no OpenAPI spec, no request/response schema, and all documentation pages render only 'Connect wallet' with no useful content. The purpose of this specific invoice endpoint is 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'0.02':10,24,75,122 '000':111 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':132 '0x8335':116 '20':110 '2913':117 '300':135 '32':42 '6':120 'Base network API' 'USDC micropayment endpoint' 'accept':102 'access':34,93,196 'actual':183,199 'addit':158 'address':131 'advertis':187 'ai/ml':65 'analyt':64 'api':61,92,145,189 'application/json':126 'avail':208 'base':8,22,83,112,119 'behind':43 'beyond':168 'broader':52 'call':60 'challeng':99 'confirm':100 'connect':153 'content':159 'data':63,68,179 'decim':121 'descript':176 'doc':143 'document':138 'dozen':55 'endpoint':6,20,30,87,182,204 'exact':107 'extrem':140 'finance/web3':67 'function':200 'gate':3,17 'id':41 'infer':66 'instant':195 'invoic':5,19,38,40,181 'json-response' 'key':190 'label':90 'limit':193 'lowpaymentfee' 'lowpaymentfee.com':32 'made':129 'materi':209 'network':84 'no-api-key' 'offer':54 'openapi':163 'output':171 'page':148 'part':49 'particular':203 'pay':9,23,58 'pay-per-cal':57 'pay-per-call invoice' 'pay-per-request' 'payment':108,127 'paywal':46 'per':13,27,59,76 'platform':53,186 'post':103 'premium':91 'price':73,144 'prompt':155 'provid':33,96 'rate':192 'readm':147 'render':150 'request':14,28,77,104 'request/response':166 'requir':105 'resourc':39 'respond':124 'return':184 'schema':167,172 'second':136 'servic':71 'settl':78 'span':62 'spars':141 'spec':164 'specif':86 'stripe':4,18,37 'stripe invoice API' 'stripe-invoices' 'stub':173 'timeout':137 'unclear':206 'unit':113 'usdc':12,26,80,115 'usdc-base' 'util':70 'wallet':154 'x402':2,16,45,98,170 'x402 paid API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"2255ebf6-f995-4caa-9e39-e3231fddf497","listingId":"18934a56-2c4e-40b8-bcd7-dbd3198d3eae","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/32","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:07.950Z"}],"sources":[{"listingId":"18934a56-2c4e-40b8-bcd7-dbd3198d3eae","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/32","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:07.950Z","lastSeenAt":"2026-04-25T05:33:15.569Z"}],"details":{"listingId":"18934a56-2c4e-40b8-bcd7-dbd3198d3eae","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/32 \\\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":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/32"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/32"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving Stripe invoice data via a single micropayment without API key registration","Programmatic access to invoice #32 for automated billing workflows","Agent-driven payment-gated API consumption on Base L2"],"bestFor":["Developers wanting keyless, pay-per-call access to invoice data","AI agents that can settle x402 payments in USDC on Base","Quick one-off invoice lookups without subscription commitments"],"notFor":["Bulk invoice processing requiring high throughput (no documented batch support)","Users needing detailed API documentation or guaranteed SLAs","Non-crypto users who cannot settle USDC payments on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.594Z"},"updatedAt":"2026-04-25T05:33:15.569Z"}}