{"id":"2fefa0f3-4c5c-42fd-b4b9-d4d8976bc429","shortId":"V9qvrf","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, pay-per-call with USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, pay-per-call with USDC.","description":"This endpoint at lowpaymentfee.com provides access to a Stripe invoice resource (invoice ID 70) behind an x402 paywall. It is part of 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 using USDC.\n\nThe specific endpoint `/api/v1/stripe/invoices/70` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform advertises uniform $0.02/request pricing across all endpoints, with no API keys, no rate limits, and no minimum commitments required. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.\n\nDocumentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the invoice endpoint actually returns. The endpoint is confirmed live (402 challenge captured), but the lack of documentation makes it difficult to understand the exact input parameters or response format.","tags":[],"capabilities":["x402-payment","usdc-on-base","stripe-invoice-access","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 payment API","USDC pay-per-call","lowpaymentfee","crypto-gated API","Base network API","micropayment API"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet'","No OpenAPI or schema definition for request parameters or response format","Purpose of the specific invoice endpoint (invoice ID 70) is unclear — it may be a demo or placeholder","No information on what data the response contains or what POST body is expected"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/70","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/70","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 with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation beyond a wallet-connect prompt, no request/response examples, and no explanation of what the Stripe invoice endpoint actually returns. This is effectively a stub 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'/api/v1/stripe/invoices/70':88 '/docs':155 '/pricing':157 '/readme':159 '/request':127 '0.02':115,126 '000':104 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':149 '0x8335':109 '20':103 '2913':110 '402':196 '6':120 '70':42 'Base network API' 'USDC pay-per-call' 'accept':89 'access':34 'across':129 'actual':189 'address':148 'advertis':98,124 'ai/ml':66 'analyt':65 'api':61,134 'base':8,22,81,105,112 'behind':43 'broader':52 'call':12,26 'captur':198 'challeng':97,197 'commit':142 'confirm':194 'connect':165 'content':171 'cost':101 'crypto-gated API' 'data':64,69 'decim':121 'difficult':206 'document':150,180,203 'dozen':55 'endpoint':6,20,30,62,87,131,188,192 'equal':114 'exact':210 'exampl':183 'extrem':152 'finance/web3':68 'format':215 'gate':3,17,74 'id':41 'infer':67 'input':211 'invoic':5,19,38,40,187 'json':94 'json-response' 'key':135 'lack':201 'limit':138 'live':195 'lowpaymentfee' 'lowpaymentfee.com':32 'make':204 'maximum':100 'micropayment API' 'minimum':141 'network':82 'no-api-key' 'offer':54 'openapi':175 'page':160 'paramet':212 'part':49 'pay':10,24,58 'pay-per-cal':9,23 'pay-per-request':57 'payment':144 'paywal':46 'per':11,25,59,116 'platform':53,123 'post':90 'price':128 'prompt':167 'protocol':78 'provid':33 'rate':137 'render':162 'request':60,91,117 'request/response':178 'requir':143 'resourc':39 'respons':214 'return':93,190 'schema':179 'sent':146 'servic':72 'span':63 'spars':153 'spec':176 'specif':86 'stripe':4,18,37 'stripe invoice API' 'stripe-invoice-access' 'understand':208 'uniform':125 'unit':106 'usdc':14,28,84,108,118 'usdc-on-base' 'use':83,119 'util':71 'via':75 'wallet':166 'x402':2,16,45,77,96 'x402 payment API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"8211ddfe-26dc-4e33-a0d5-2bf34ee8b8bb","listingId":"2fefa0f3-4c5c-42fd-b4b9-d4d8976bc429","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/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:06.121Z"}],"sources":[{"listingId":"2fefa0f3-4c5c-42fd-b4b9-d4d8976bc429","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/70","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:06.121Z","lastSeenAt":"2026-04-25T07:03:30.162Z"}],"details":{"listingId":"2fefa0f3-4c5c-42fd-b4b9-d4d8976bc429","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/70\n# Returns 402 with x402 challenge; include X-PAYMENT header with valid USDC payment proof to access.","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/70"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/70"}],"useCases":["Retrieving Stripe invoice data via a single pay-per-call request","Programmatic access to invoice #70 without needing API keys or subscriptions","Agent-driven invoice retrieval settled in USDC on Base"],"bestFor":["Developers wanting keyless, pay-per-use access to Stripe invoice data","AI agents that can settle x402 payments in USDC on Base","Users who prefer crypto micropayments over traditional API subscriptions"],"notFor":["Users needing detailed API documentation or request/response schemas before integrating","Bulk invoice retrieval across many invoice IDs (only invoice 70 is exposed at this endpoint)","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.749Z"},"updatedAt":"2026-04-25T07:03:30.162Z"}}