{"id":"be08ac53-fe91-4de5-ab12-b3cab197e414","shortId":"VGeZpm","kind":"x402","title":"Pay-per-call Stripe invoice API endpoint on Base network via x402, $0.02/request in USDC.","tagline":"Pay-per-call Stripe invoice API endpoint on Base network via x402, $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a Stripe invoice resource (invoice ID 124) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum cost of 20,000 base units (i.e., $0.02 given USDC's 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities—all priced at $0.02 per request with no API keys, no rate limits, and instant access. However, the specific endpoint listed here (/api/v1/stripe/invoices/124) does not appear in the site's publicly documented API catalog, and its exact functionality (beyond being labeled \"Premium API Access\") is unclear. No OpenAPI schema, request/response examples, or detailed documentation were found for this particular route.\n\nThe endpoint is confirmed live: it returns a proper x402 402 challenge with version 1, scheme \"exact\", and a 300-second payment timeout. The payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.","tags":[],"capabilities":["x402-payment","usdc-base-network","stripe-invoice-access","pay-per-request","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice api","x402 payment endpoint","pay-per-call api","USDC micropayment","base network api","lowpaymentfee"],"warnings":["No documentation or schema available for this specific endpoint","Endpoint path not listed in the site's public API catalog","Exact request body format and response structure are unknown","Purpose of 'Premium API Access' label is ambiguous—may be a demo or placeholder"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/124","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/124","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no request/response examples, and no documentation explaining what data is returned. The specific endpoint path (/api/v1/stripe/invoices/124) is not listed in the site's public catalog, making its purpose unclear beyond the generic 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'/request':15,32 '0.02':14,31,82,110 '000':78 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':195 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':71 '1':181 '124':48 '20':77 '300':186 '402':177 '6':86 'USDC micropayment' 'accept':55 'access':40,122,150 'address':193 'advertis':92 'ai':99 'analyt':98 'api':7,24,94,115,139,149 'appear':132 'base':10,27,66,79 'base network api' 'beyond':145 'broader':89 'call':4,21 'catalog':140 'categori':95 'challeng':178 'confirm':170 'contract':70 'cost':75 'data':97 'decim':87 'detail':159 'document':138,160 'endpoint':8,25,36,126,168 'exact':143,183 'exampl':157 'financ':102 'found':162 'function':144 'given':83 'howev':123 'i.e':81 'id':47 'includ':96 'infrastructur':105 'instant':121 'invoic':6,23,44,46 'json':60 'key':116 'label':147 'learn':101 'limit':119 'list':127 'live':171 'lowpaymentfee' 'lowpaymentfee.com':38,90 'machin':100 'maximum':74 'multipl':93 'network':11,28,67 'no-api-key' 'openapi':154 'particular':165 'pay':2,19 'pay-per-cal':1,18 'pay-per-call api' 'pay-per-request' 'payment':52,61,188,191 'per':3,20,111 'platform':91 'post':56 'premium':148 'price':108 'proper':175 'protocol':53 'provid':39 'public':137 'rate':118 'recipi':192 'request':57,112 'request/response':156 'resourc':45 'return':59,173 'rout':166 'schema':155 'scheme':182 'second':187 'settl':63 'site':135 'specif':125 'stripe':5,22,43 'stripe invoice api' 'stripe-invoice-access' 'timeout':189 'unclear':152 'unit':80 'usdc':17,34,69,84 'usdc-base-network' 'use':68 'util':106 'version':180 'via':12,29,49 'web3':103 'x402':13,30,51,176 'x402 payment endpoint' 'x402-payment'","prices":[{"id":"3fa003b7-2711-4ce0-af5f-910389fb5a48","listingId":"be08ac53-fe91-4de5-ab12-b3cab197e414","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/124","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:37.280Z"}],"sources":[{"listingId":"be08ac53-fe91-4de5-ab12-b3cab197e414","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/124","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:37.280Z","lastSeenAt":"2026-04-25T12:32:37.743Z"}],"details":{"listingId":"be08ac53-fe91-4de5-ab12-b3cab197e414","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/124 \\\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":"Endpoint returns x402 402 challenge with maxAmountRequired 20000 USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/124"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/124"}],"useCases":["Retrieving Stripe invoice data without traditional API key authentication","Programmatic access to invoice #124 via crypto micropayment","Agent-driven invoice lookup settled in USDC on Base"],"bestFor":["Agents needing keyless, pay-per-use access to invoice data","Developers experimenting with x402 payment protocol","Scenarios requiring no subscription or rate-limit constraints"],"notFor":["Bulk invoice retrieval or batch processing (single invoice endpoint)","Users who need detailed documentation or guaranteed SLA","Non-crypto users who cannot settle payments on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.983Z"},"updatedAt":"2026-04-25T12:32:37.743Z"}}