{"id":"550f12fb-f446-4aad-99d6-8cef3488b5d4","shortId":"PkNXRu","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 exposes a specific Stripe invoice resource (`/api/v1/stripe/invoices/195`) behind an x402 paywall. The provider operates a broader platform offering dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all gated via the x402 protocol on the Base network and settled in USDC.\n\nThe specific endpoint listed here is described only as \"Premium API Access\" and returns a Stripe invoice resource. The x402 challenge confirms it is live, accepting POST requests, and requires a maximum payment of 20,000 base units of USDC (0x8335…on Base), which equals $0.02 USD (USDC uses 6 decimals). The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all rendered only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what data the invoice endpoint actually returns or what input parameters it accepts. The landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and instant access. However, the specific behavior and schema of this particular Stripe invoices endpoint remain undocumented.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoice","pay-per-request","no-api-key","no-rate-limit"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid API","USDC micropayment API","lowpaymentfee","pay-per-call API","Base network API","crypto payment gateway"],"warnings":["No documentation available — docs, API, pricing, and README pages all render only a wallet-connect prompt","No OpenAPI or input/output schema provided for this endpoint","The purpose and behavior of '/api/v1/stripe/invoices/195' is unclear — 'Premium API Access' is not descriptive","No example requests or responses available anywhere in crawled content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/195","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/195","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 captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what this Stripe invoice endpoint actually does or accepts. Effectively a stub 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'/request':200 '0.02':127,199 '000':117 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':139 '0x8335':122 '20':116 '300':142 '6':131 'Base network API' 'USDC micropayment API' 'accept':107,192 'access':93,215 'across':203 'actual':185 'address':138 'ai/ml':61 'analyt':60 'api':57,92,152,208 'base':8,22,76,118,124 'base-network' 'behavior':219 'behind':40 'broader':48 'call':12,26 'challeng':102 'confirm':103,196 'connect':161 'content':167 'crawl':150 'crypto':64 'crypto payment gateway' 'data':59,181 'decim':132 'describ':88 'descript':178 'doc':151 'document':145 'dozen':51 'endpoint':6,20,30,84,184,205,227 'equal':126 'exampl':175 'expos':33 'extrem':147 'financ':63 'flat':198 'gate':3,17,69 'howev':216 'infer':62 'input':189 'instant':214 'invoic':5,19,37,98,183,226 'key':209 'land':194 'limit':212 'list':85 'live':106 'lowpaymentfee' 'lowpaymentfee.com':32 'maximum':113 'model':202 'network':77 'no-api-key' 'no-rate-limit' 'offer':50 'openapi':171 'oper':46 'page':156,195 'paid':9,23 'paramet':190 'particular':224 'pay':54 'pay-per-call API' 'pay-per-request':53 'payment':114,134 'paywal':43 'per':11,25,55 'per-cal':10,24 'platform':49 'post':108 'premium':91 'price':153,201 'prompt':163 'protocol':73 'provid':45 'rate':211 'readm':155 'remain':228 'render':158 'request':56,109 'request/response':174 'requir':111 'resourc':38,99 'return':95,186 'schema':172,221 'second':143 'sent':136 'servic':67 'settl':79 'span':58 'spars':148 'specif':35,83,218 'stripe':4,18,36,97,225 'stripe invoice API' 'stripe-invoice' 'substant':166 'timeout':144 'undocu':229 'unit':119 'usd':128 'usdc':14,28,81,121,129 'usdc-settlement' 'use':130 'util':66 'via':70 'wallet':162 'x402':2,16,42,72,101 'x402 paid API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"77e3306c-f67f-477b-939d-c43f17101bb3","listingId":"550f12fb-f446-4aad-99d6-8cef3488b5d4","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/195","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:53.473Z"}],"sources":[{"listingId":"550f12fb-f446-4aad-99d6-8cef3488b5d4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/195","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:53.473Z","lastSeenAt":"2026-04-25T10:03:27.524Z"}],"details":{"listingId":"550f12fb-f446-4aad-99d6-8cef3488b5d4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/195\n# Returns 402 with x402 challenge; attach X-PAYMENT header with 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/195"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/195"},{"claim":"Flat pricing of $0.02 per request across all endpoints, no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"The provider offers APIs across data analytics, AI/ML, finance/crypto, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving or triggering a Stripe invoice via a single paid API call","Programmatic invoice access without traditional API key management","Agent-driven payment workflows where per-call USDC settlement is preferred"],"bestFor":["Developers wanting keyless, pay-per-use API access settled in USDC on Base","AI agents that can handle x402 payment challenges natively","Users needing Stripe invoice data without maintaining Stripe credentials"],"notFor":["Production use cases requiring documented request/response schemas","High-volume invoice processing where per-call fees add up","Users who need fiat-only payment rails with no crypto involvement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.295Z"},"updatedAt":"2026-04-25T10:03:27.524Z"}}