{"id":"cde6becd-da16-45c0-bc62-c7dc03af4886","shortId":"9uEMJS","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 \"Premium API Access\" via the x402 payment protocol. It is part of a broader platform offering pay-per-request APIs across categories including data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific endpoint `/api/v1/stripe/invoices/41` appears to be a Stripe invoice-related resource, though the exact response payload is not documented.\n\nPayment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a cost of $0.02 per request (20,000 base units with 6 decimals). The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The endpoint accepts POST requests and returns application/json.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no example request/response bodies, and no description of what data the invoice endpoint actually returns.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","stripe-invoices","json-response","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 payment endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["No documentation available — /docs, /api, /pricing, /README all show only 'Connect wallet'","No OpenAPI schema or example responses provided","Exact purpose of '/api/v1/stripe/invoices/41' is unclear — could be a demo or placeholder","No information on what data is returned in the response body"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/41","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/41","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation of request parameters, response schema, or what the endpoint actually returns. All detail pages render only 'Connect wallet' with no 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'/api/v1/stripe/invoices/41':69 '/docs':155 '/pricing':157 '/readme':159 '0.02':10,24,102 '000':106 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':97 '20':105 '6':110 'Base network API' 'USDC micropayment API' 'accept':140 'access':36,123 'across':55 'actual':191 'advertis':114 'ai/ml':60 'analyt':59 'api':35,54,116 'appear':70 'application/json':145 'attach':126 'base':8,22,92,107 'beyond':147 'bodi':181 'broader':47 'caller':124 'categori':56 'connect':165 'contract':96 'cost':100 'data':58,187 'decim':111 'descript':184 'detail':172 'document':86,146 'endpoint':6,20,30,68,139,190 'exact':81 'exampl':179 'extrem':152 'finance/web3':62 'gate':3,17 'header':131 'includ':57 'infer':61 'infrastructur':64 'instant':122 'invoic':5,19,76,189 'invoice-rel':75 'json-response' 'key':117 'land':149 'limit':120 'lowpaymentfee' 'lowpaymentfee.com':32 'network':93 'no-api-key' 'offer':49 'openapi':176 'page':150,160 'part':44 'pay':9,23,51 'pay-per-call API' 'pay-per-request':50 'payload':83 'payment':40,87,130,136 'per':11,25,52,103 'platform':48,113 'post':141 'premium':34 'prompt':167 'proof':137 'protocol':41 'provid':33 'rate':119 'relat':77 'render':162 'request':12,26,53,104,142 'request/response':180 'resourc':78 'respons':82 'return':144,192 'schema':177 'settl':89 'simpli':125 'spars':153 'specif':67 'stripe':4,18,74 'stripe invoice API' 'stripe-invoices' 'technic':171 'though':79 'unit':108 'usdc':14,28,95 'usdc-base-network' 'use':94 'util':65 'valid':134 'via':37 'wallet':166 'x':129 'x-payment':128 'x402':2,16,39,135 'x402 payment endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"b9e49db7-718f-4981-bff2-d30d5c881a2c","listingId":"cde6becd-da16-45c0-bc62-c7dc03af4886","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/41","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:07.338Z"}],"sources":[{"listingId":"cde6becd-da16-45c0-bc62-c7dc03af4886","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/41","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:07.338Z","lastSeenAt":"2026-04-25T07:03:30.277Z"}],"details":{"listingId":"cde6becd-da16-45c0-bc62-c7dc03af4886","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/41 \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\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 advertising USDC on Base network at 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/41"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, 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/41"}],"useCases":["Programmatically retrieving Stripe invoice data without traditional API key management","Agent-driven payment workflows where per-call USDC settlement is preferred","Integrating invoice lookups into crypto-native applications"],"bestFor":["Developers wanting keyless, pay-per-request access to invoice data","AI agents with x402-compatible wallets on Base","Crypto-native applications needing low-friction API access"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-volume batch invoice processing where per-call fees add up","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.637Z"},"updatedAt":"2026-04-25T07:03:30.277Z"}}