{"id":"81a0ee4f-3df9-4aa8-834e-61bb8827aa0e","shortId":"SSYFEv","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 provides access to a Stripe invoice resource (invoice ID 90) behind an x402 paywall. It is part of a broader platform that offers dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all gated via the x402 protocol on the Base network, settled in USDC.\n\nThe specific endpoint `/api/v1/stripe/invoices/90` accepts POST requests and returns `application/json`. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform's landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and no minimum commitments required.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples. The exact purpose of the \"Stripe invoices\" resource and what data it returns are not documented. The endpoint is confirmed live via a valid 402 challenge response.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoices","pay-per-request","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 payment API","USDC micropayment","pay-per-call API","Base network API","lowpaymentfee"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content.","No OpenAPI or request/response schema provided; request body format and response structure are unknown.","The specific purpose and data returned by /api/v1/stripe/invoices/90 are not documented anywhere in the crawl material.","The endpoint path references a hardcoded invoice ID (90), which may indicate a demo or placeholder resource."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/90","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/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (valid 402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The purpose of the specific 'stripe/invoices/90' resource is undocumented, making this effectively a stub 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'/api/v1/stripe/invoices/90':90 '/docs':155 '/pricing':156 '/readme':159 '/request':132 '0.02':116,131 '000':106 '0x8335':111 '20':105 '402':209 '6':121 '90':42 'Base network API' 'USDC micropayment' 'accept':91 'access':34 'across':135 'advertis':100 'ai/ml':67 'analyt':66 'api':62,140 'application/json':96 'base':8,22,82,107,113 'base-network' 'behind':43 'broader':52 'call':12,26 'challeng':99,210 'commit':148 'confirm':128,204 'connect':165 'content':171 'cost':103 'data':65,70,195 'decim':122 'document':150,180,200 'dozen':56 'endpoint':6,20,30,63,89,137,202 'equal':115 'exact':186 'exampl':184 'extrem':152 'finance/web3':69 'flat':130 'gate':3,17,75 'id':41 'infer':68 'invoic':5,19,38,40,191 'key':141 'land':126 'limit':144 'live':205 'lowpaymentfee' 'lowpaymentfee.com':32 'maximum':102 'minimum':147 'model':134 'network':83 'no-api-key' 'offer':55 'openapi':175 'page':127,160 'paid':9,23 'part':49 'pay':59 'pay-per-call API' 'pay-per-request':58 'paywal':46 'per':11,25,60,117 'per-cal':10,24 'platform':53,124 'post':92 'price':133 'prompt':167 'protocol':79 'provid':33 'purpos':187 'rate':143 'render':162 'request':61,93,118 'request/response':178 'requir':149 'resourc':39,192 'respons':211 'return':95,197 'schema':179 'servic':73 'settl':84 'span':64 'spars':153 'spec':176 'specif':88 'stripe':4,18,37,190 'stripe invoice API' 'stripe-invoices' 'substant':170 'unit':108 'usag':183 'usdc':14,28,86,110,119 'usdc-settlement' 'use':120 'util':72 'valid':208 'via':76,206 'wallet':166 'x402':2,16,45,78,98 'x402 payment API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"bcc536c2-6b87-42e3-83ab-f0437130a760","listingId":"81a0ee4f-3df9-4aa8-834e-61bb8827aa0e","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/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:19.220Z"}],"sources":[{"listingId":"81a0ee4f-3df9-4aa8-834e-61bb8827aa0e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/90","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:19.220Z","lastSeenAt":"2026-04-25T04:03:27.131Z"}],"details":{"listingId":"81a0ee4f-3df9-4aa8-834e-61bb8827aa0e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/90 \\\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 x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/90"},{"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":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/90"}],"useCases":["Retrieving Stripe invoice data via a single micropayment without needing an API key","Programmatic access to invoice records settled on-chain in USDC","Agent-driven invoice lookups where per-call billing is preferred over subscriptions"],"bestFor":["Agents or services that need one-off invoice data without subscription overhead","Developers experimenting with x402 payment flows on Base","Use cases requiring keyless, pay-as-you-go API access"],"notFor":["High-volume invoice processing where per-call costs add up quickly","Users who need detailed API documentation or guaranteed SLAs","Anyone requiring non-USDC or non-Base settlement options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.069Z"},"updatedAt":"2026-04-25T04:03:27.131Z"}}