{"id":"ea8ce9f8-4515-47f8-ad01-f398dc97d604","shortId":"bfYmB3","kind":"x402","title":"Pay-per-call Stripe invoice creation endpoint on Base via x402, settled in USDC.","tagline":"Pay-per-call Stripe invoice creation endpoint on Base via x402, settled in USDC.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" service specifically at the path `/api/v1/stripe/invoices/60`. It is part of a broader platform offering dozens of pay-per-request API endpoints across data analytics, AI/ML, finance, infrastructure, and utility categories — all gated by the x402 payment protocol on the Base network using USDC.\n\nThe specific endpoint probed here accepts POST requests and returns `application/json`. Based on the URL path (`/stripe/invoices/60`), it likely relates to Stripe invoice operations (creation or retrieval for invoice ID 60), though the platform's own documentation is extremely sparse and does not describe request/response schemas for individual endpoints. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the site's advertised flat pricing of $0.02/request across all endpoints.\n\nThe platform advertises no API keys, no rate limits, and instant access. Payment is handled entirely through the x402 protocol: callers attach an `X-PAYMENT` header with a signed USDC payment on Base. The payTo address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, and the accepted asset contract is `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` (USDC on Base). No OpenAPI spec, detailed docs, or example payloads were found.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoices","pay-per-request","no-api-key","json-response"],"categories":["finance","payments"],"synonyms":["stripe invoice API","x402 stripe","pay-per-call invoice","USDC API payment","lowpaymentfee","crypto-gated API","Base USDC endpoint"],"warnings":["No OpenAPI spec or request/response schema available — actual endpoint behavior is unknown","Documentation pages (/docs, /api, /pricing, /README) all returned only 'Connect wallet' with no useful content","The endpoint's exact functionality (invoice creation vs. retrieval vs. other) is inferred solely from the URL path","No examples of successful responses are available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/60","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/60","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) with clear pricing ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and no examples. The actual functionality behind the endpoint path is inferred from the URL 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'/request':164 '/stripe/invoices/60':100 '0.02':151,163 '000':142 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':206 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':213 '20':141 '6':147 '60':114 'Base USDC endpoint' 'USDC API payment' 'accept':89,209 'access':39,179 'across':62,165 'address':204 'advertis':159,170 'ai/ml':65 'analyt':64 'api':38,60,172 'application/json':94 'asset':210 'attach':189 'base':10,25,80,95,143,201,216 'base-network' 'broader':51 'call':4,19 'caller':188 'categori':70 'challeng':135 'consist':154 'contract':211 'cost':139 'creation':7,22,108 'crypto-gated API' 'data':63 'decim':148 'describ':127 'detail':220 'doc':221 'document':120 'dozen':54 'endpoint':8,23,32,61,86,132,167 'entir':183 'equal':150 'exampl':223 'extrem':122 'financ':66 'flat':160 'found':226 'gate':72 'handl':182 'header':194 'id':113 'indic':136 'individu':131 'infrastructur':67 'instant':178 'invoic':6,21,106,112 'json-response' 'key':173 'like':102 'limit':176 'lowpaymentfee' 'lowpaymentfee.com':34 'maximum':138 'network':81 'no-api-key' 'offer':53 'openapi':218 'oper':107 'part':48 'path':44,99 'pay':2,17,57 'pay-per-cal':1,16 'pay-per-call invoice' 'pay-per-request':56 'payload':224 'payment':76,180,193,199 'payto':203 'per':3,18,58,152 'platform':52,117,169 'post':90 'premium':37 'price':161 'probe':87 'protocol':77,187 'provid':35 'rate':175 'relat':103 'request':59,91,153 'request/response':128 'retriev':110 'return':93 'schema':129 'servic':40 'settl':13,28 'sign':197 'site':157 'spars':123 'spec':219 'specif':41,85 'stripe':5,20,105 'stripe invoice API' 'stripe-invoices' 'though':115 'unit':144 'url':98 'usdc':15,30,83,146,198,214 'usdc-settlement' 'use':82 'util':69 'via':11,26 'x':192 'x-payment':191 'x402':12,27,75,134,186 'x402 stripe' 'x402-payment'","prices":[{"id":"b29a38fd-977d-4cba-8a5c-576f34f7d5a0","listingId":"ea8ce9f8-4515-47f8-ad01-f398dc97d604","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/60","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:00.095Z"}],"sources":[{"listingId":"ea8ce9f8-4515-47f8-ad01-f398dc97d604","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/60","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:00.095Z","lastSeenAt":"2026-04-22T19:32:02.448Z"}],"details":{"listingId":"ea8ce9f8-4515-47f8-ad01-f398dc97d604","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/60 \\\n  -H \"X-PAYMENT: <x402-signed-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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/60"},{"claim":"The platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/60"}],"useCases":["Creating or retrieving Stripe invoices via a pay-per-call model without API key management","Integrating invoice operations into agent workflows that settle payments on Base L2","Programmatic invoice access where traditional Stripe API key provisioning is undesirable"],"bestFor":["Agents or bots needing on-demand Stripe invoice access without subscription overhead","Developers experimenting with x402 payment-gated APIs on Base","Low-volume invoice operations where $0.02/call is cost-effective"],"notFor":["High-volume Stripe operations where direct Stripe API access would be cheaper","Use cases requiring detailed Stripe API features (webhooks, subscriptions, etc.) beyond what this wrapper exposes","Users who need comprehensive API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.969Z"},"updatedAt":"2026-04-22T19:32:02.448Z"}}