{"id":"3b25d697-2791-41a5-9f60-4f4e78244fc1","shortId":"csXXZj","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, paying per-call in USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, paying per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a Stripe invoice resource (invoice ID 11) behind an x402 payment wall. The provider operates a broader platform offering 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 and settled in USDC.\n\nThe specific endpoint `/api/v1/stripe/invoices/11` is described by the provider simply as \"Premium API Access.\" The x402 challenge confirms it accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call, and settles to a wallet on Base. The asset address matches Base-native USDC. No API keys or rate limits are advertised; access is granted purely through on-chain micropayment.\n\nDocumentation is extremely thin — 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 explanation of what data this particular invoice endpoint returns. The broader site lists many endpoints at $0.02 each but provides no technical documentation for any of them. Without further details it is unclear what payload to send or what response to expect from this specific route.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoice-access","pay-per-request","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 micropayment API","USDC pay-per-call","lowpaymentfee","Base network API","402 payment required endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or request/response schema provided; it is unknown what payload to POST or what the response looks like.","The endpoint path suggests a single Stripe invoice resource (ID 11); unclear if this is a demo or production resource.","The description 'Premium API Access' is generic and does not explain the endpoint's actual functionality."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/11","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/11","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is virtually no documentation: no OpenAPI spec, no request/response examples, no explanation of what the endpoint actually returns. Docs pages are empty beyond a wallet-connect prompt. The listing is effectively a 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'0.02':120,208 '000':114 '11':42 '20':113 '402 payment required endpoint' '6':124 'Base network API' 'USDC pay-per-call' 'accept':106 'access':34,100,151 'address':137 'advertis':150 'ai/ml':66 'analyt':65 'api':61,99,144,166 'asset':136 'base':8,22,81,115,134,140 'base-n':139 'base-network' 'behind':43 'broader':52,202 'call':12,26,127 'chain':158 'challeng':103 'charg':109 'confirm':104 'connect':175 'content':181 'data':64,69,195 'decim':125 'describ':92 'detail':221 'doc':165 'document':160,214 'dozen':55 'endpoint':6,20,30,62,89,199,206 'exampl':189 'expect':233 'explan':192 'extrem':162 'finance/web3':68 'gate':3,17,74 'given':121 'grant':153 'i.e':119 'id':41 'infer':67 'invoic':5,19,38,40,198 'key':145 'limit':148 'list':204 'lowpaymentfee' 'lowpaymentfee.com':32 'mani':205 'match':138 'maximum':111 'micropay':159 'nativ':141 'network':82 'no-api-key' 'offer':54 'on-chain':156 'openapi':185 'oper':50 'page':170 'particular':197 'pay':9,23,58 'pay-per-request':57 'payload':226 'payment':46 'per':11,25,59,126 'per-cal':10,24 'platform':53 'post':107 'premium':98 'price':167 'prompt':177 'protocol':78 'provid':33,49,95,211 'pure':154 'rate':147 'readm':169 'render':172 'request':60,108 'request/response':188 'resourc':39 'respons':231 'return':200 'rout':237 'schema':186 'send':228 'servic':72 'settl':84,129 'simpli':96 'site':203 'span':63 'specif':88,236 'stripe':4,18,37 'stripe invoice API' 'stripe-invoice-access' 'substant':180 'technic':213 'thin':163 'unclear':224 'unit':116 'usdc':14,28,86,118,122,142 'usdc-settlement' 'util':71 'via':75 'wall':47 'wallet':132,176 'without':219 'x402':2,16,45,77,102 'x402 micropayment API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"d493108f-1572-443a-a3e0-8cd2c8b858a8","listingId":"3b25d697-2791-41a5-9f60-4f4e78244fc1","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/11","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:28.877Z"}],"sources":[{"listingId":"3b25d697-2791-41a5-9f60-4f4e78244fc1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/11","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:28.877Z","lastSeenAt":"2026-04-25T16:03:44.634Z"}],"details":{"listingId":"3b25d697-2791-41a5-9f60-4f4e78244fc1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/11 \\\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 returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/11"},{"claim":"The provider lists endpoints at $0.02 per request with no API keys, no rate limits, and instant access on Base","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is Base-native USDC","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/11"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving Stripe invoice data via a single micropayment without API key registration","Programmatic access to invoice information settled on-chain in USDC","Agent-driven invoice lookup with per-call payment on Base"],"bestFor":["Developers wanting keyless, pay-per-use access to invoice data","AI agents that can settle x402 payments on Base in USDC","Users who prefer on-chain micropayments over subscription billing"],"notFor":["Anyone needing detailed API documentation or request/response schemas before integrating","High-volume invoice processing where $0.02 per call adds up significantly","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:52.419Z"},"updatedAt":"2026-04-25T16:03:44.634Z"}}