{"id":"4f1078b7-53e3-4d63-a079-2520d6af628a","shortId":"WF3p7E","kind":"x402","title":"Pay-per-call Stripe invoice API on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call Stripe invoice API on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a Stripe invoices resource via the x402 payment protocol. The specific path `/api/v1/stripe/invoices/100` suggests retrieval or creation of Stripe invoice data (likely for invoice ID 100). Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). The endpoint accepts POST requests and returns application/json.\n\nThe provider, lowpaymentfee.com, hosts a broader catalog of x402-gated APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/crypto market data, and utility services — all priced uniformly at $0.02 per request. The platform advertises no API keys, no rate limits, and instant access; callers authenticate solely through the x402 payment header on the Base L2 network.\n\nDocumentation is extremely sparse. 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 detailed description of what the Stripe invoices endpoint actually returns or what parameters it accepts. The endpoint is confirmed live (402 challenge captured), but the lack of documentation makes it difficult to use without experimentation.","tags":[],"capabilities":["x402-payment","usdc-base","stripe-invoices","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice api","x402 api","pay per call api","usdc payment api","base network api","micropayment api","invoice endpoint"],"warnings":["No API documentation available — docs, pricing, and README pages all render only 'Connect wallet'","No OpenAPI or JSON schema describing request parameters or response format","Unclear what data the /api/v1/stripe/invoices/100 endpoint actually returns","No request or response examples available anywhere in crawled content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/100","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/100","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 confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation: no OpenAPI schema, no request/response examples, no parameter descriptions. The docs pages all show only 'Connect wallet'. The specific behavior of the Stripe invoices endpoint is entirely 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'/request':13,28 '0.02':12,27,87,134 '000':82 '0x8335':74 '100':63 '20':81 '2913':75 '402':214 '6':92 'accept':96,208 'access':36,148 'actual':202 'advertis':139 'ai/ml':117 'analysi':120 'analyt':116 'api':7,22,113,141,168 'application/json':101 'authent':150 'base':9,24,69,83,159 'base network api' 'broader':107 'call':4,19 'caller':149 'captur':216 'catalog':108 'challeng':215 'classif':122 'confirm':212 'connect':177 'content':183 'contract':73 'cost':79 'creation':54 'data':58,115,126 'decim':93 'descript':195 'detail':194 'difficult':224 'doc':167 'document':162,221 'embed':123 'endpoint':32,95,201,210 'equal':86 'exampl':191 'experiment':228 'extrem':164 'finance/crypto':124 'gate':112 'header':156 'host':105 'id':62 'infer':118 'instant':147 'invoic':6,21,40,57,61,200 'invoice endpoint' 'json-response' 'key':142 'l2':160 'lack':219 'like':59 'limit':145 'live':213 'lowpaymentfee.com':34,104 'make':222 'market':125 'maximum':78 'micropayment api' 'network':70,161 'no-api-key' 'openapi':187 'page':172 'paramet':206 'path':49 'pay':2,17 'pay per call api' 'pay-per-cal':1,16 'pay-per-request' 'payment':45,64,155 'per':3,18,88,135 'platform':138 'post':97 'price':131,169 'prompt':179 'protocol':46 'provid':35,103 'rate':144 'readm':171 'render':174 'request':89,98,136 'request/response':190 'resourc':41 'retriev':52 'return':100,203 'schema':188 'sentiment':119 'servic':129 'settl':66 'sole':151 'span':114 'spars':165 'specif':48 'stripe':5,20,39,56,199 'stripe invoice api' 'stripe-invoices' 'substant':182 'suggest':51 'summar':121 'uniform':132 'unit':84 'usdc':15,30,72,90 'usdc payment api' 'usdc-base' 'use':71,91,226 'util':128 'via':10,25,42 'wallet':178 'without':227 'x402':11,26,44,111,154 'x402 api' 'x402-gated':110 'x402-payment'","prices":[{"id":"9a4506a8-b35c-4b25-9e19-458bf96bbd5e","listingId":"4f1078b7-53e3-4d63-a079-2520d6af628a","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/100","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:31.866Z"}],"sources":[{"listingId":"4f1078b7-53e3-4d63-a079-2520d6af628a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/100","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:31.866Z","lastSeenAt":"2026-04-25T14:32:46.687Z"}],"details":{"listingId":"4f1078b7-53e3-4d63-a079-2520d6af628a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/100 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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, maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/100"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/100"}],"useCases":["Retrieving or generating Stripe invoice data without traditional API key management","Programmatic invoice access with per-call USDC micropayments on Base","Agent-driven invoice lookups settled via x402 protocol"],"bestFor":["Developers wanting keyless, pay-per-use access to Stripe invoice data","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume invoice processing where per-call fees add up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:52.28Z"},"updatedAt":"2026-04-25T14:32:46.687Z"}}