{"id":"048dbf07-720d-4cbf-b99f-41ecbf51b3c3","shortId":"PuGUBX","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 payment wall. The specific resource `/api/v1/stripe/invoices/25` appears to be part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints on the platform are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge for this particular endpoint advertises a maxAmountRequired of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per call, consistent with the platform's stated pricing. Payment is made via the x402 \"exact\" scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a 300-second timeout.\n\nThe endpoint accepts HTTP POST requests and returns application/json. However, the specific functionality of the `/stripe/invoices/25` resource is not documented in the crawled material — the landing page lists other API categories (analytics, AI, finance, infrastructure) but does not mention Stripe invoice endpoints. No OpenAPI spec, request/response schemas, or detailed documentation were found; the docs, pricing, and API pages all rendered only a \"Connect wallet\" prompt with no further content.","tags":[],"capabilities":["x402-payment","usdc-on-base","pay-per-call","stripe-invoices","http-post","json-response"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid API","USDC micropayment API","lowpaymentfee","pay-per-request API","Base network API"],"warnings":["No OpenAPI spec or request/response schema available","The specific /api/v1/stripe/invoices/25 endpoint is not listed or documented on the landing page","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no useful content","The actual functionality behind this endpoint is unclear — 'Premium API Access' is a generic label"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/25","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/25","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) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of the /stripe/invoices/25 resource is undocumented. The docs pages returned only wallet-connect prompts with no 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'/stripe/invoices/25':169 '0.02':80,128 '000':111 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':148 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':117 '20':110 '300':151 '6':123 'Base network API' 'USDC micropayment API' 'accept':156 'access':36 'address':147 'advertis':106 'ai':186 'ai/ml':65 'analyt':64,185 'api':35,61,92,183,210 'appear':46 'application/json':162 'asset':116 'base':8,22,88,112,119 'behind':37 'broader':52 'call':12,26,60,130 'categori':184 'challeng':101 'commit':97 'connect':216 'consist':131 'content':222 'crawl':176 'data':63,68 'decim':124 'detail':202 'doc':207 'document':173,203 'dozen':55 'endpoint':6,20,30,73,105,155,195 'exact':144 'financ':187 'finance/web3':67 'found':205 'function':166 'gate':3,17 'howev':163 'http':157 'http-post' 'infer':66 'infrastructur':188 'invoic':5,19,194 'json-response' 'key':93 'land':179 'limit':95 'list':181 'lowpaymentfee' 'lowpaymentfee.com':32 'made':140 'materi':177 'maxamountrequir':108 'mention':192 'network':89 'offer':54 'openapi':197 'page':180,211 'paid':9,23 'part':49 'particular':104 'pay':58 'pay-per-cal':57 'pay-per-call' 'pay-per-request API' 'payabl':83 'payment':40,138 'per':11,25,59,81,129 'per-cal':10,24 'platform':53,76,134 'post':158 'premium':34 'price':78,137,208 'prompt':218 'provid':33 'rate':94 'render':213 'request':82,159 'request/response':199 'requir':98 'resourc':44,170 'return':161 'schema':200 'scheme':145 'second':152 'servic':71 'sinc':120 'span':62 'spec':198 'specif':43,165 'state':136 'stripe':4,18,193 'stripe invoice API' 'stripe-invoices' 'timeout':153 'translat':126 'unit':113 'usdc':14,28,85,115,121 'usdc-on-base' 'use':122 'util':70 'via':141 'wall':41 'wallet':217 'x402':2,16,39,100,143 'x402 paid API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"4c963768-2b80-4fba-b430-2a8b02380951","listingId":"048dbf07-720d-4cbf-b99f-41ecbf51b3c3","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/25","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:51.069Z"}],"sources":[{"listingId":"048dbf07-720d-4cbf-b99f-41ecbf51b3c3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/25","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:51.069Z","lastSeenAt":"2026-04-25T10:03:27.464Z"}],"details":{"listingId":"048dbf07-720d-4cbf-b99f-41ecbf51b3c3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/25 \\\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":"Platform pricing is $0.02 per request with no API keys, rate limits, or minimums","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge shows maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/25"},{"claim":"USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/25"},{"claim":"Platform lists APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving or generating Stripe invoice data via a single paid API call","Programmatic access to invoice information without API key management","Agent-driven invoice lookups settled in USDC on Base"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents that can settle x402 payments in USDC on Base","Users who need low-friction access without subscriptions or rate limits"],"notFor":["Users who need detailed documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.343Z"},"updatedAt":"2026-04-25T10:03:27.464Z"}}