{"id":"bfaac3d4-133a-45bd-ac20-4fdf623f9dce","shortId":"CxU7vc","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 \"Premium API Access\" behind an x402 payment challenge. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all settled on the Base network using USDC via the x402 protocol.\n\nThe specific endpoint `/api/v1/stripe/invoices/186` appears to be a Stripe invoice-related resource. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). The payment scheme is \"exact\" with a 300-second timeout. The endpoint accepts POST requests and returns application/json.\n\nThe platform advertises a simple pricing model of $0.02 per request with no API keys, no rate limits, no minimums, and instant access. Documentation pages (docs, pricing, README) were largely empty beyond a \"Connect wallet\" prompt, so detailed request/response schemas and usage examples are not available from the crawl. The endpoint is confirmed live — it returned a proper 402 challenge during probing.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoices","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid API","USDC micropayment API","Base network API","pay-per-call endpoint","lowpaymentfee"],"warnings":["Documentation pages (docs, pricing, README) are empty beyond a wallet-connect prompt","No request body schema or response schema available — unclear what data to POST or what is returned","The endpoint path references a specific invoice ID (186), which may be a demo or placeholder resource","The generic 'Premium API Access' description does not clarify what this endpoint actually does"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/186","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/186","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 documentation is essentially absent — docs, pricing, and README pages only show 'Connect wallet'. No request/response schema, no usage examples, and the specific purpose of the '/stripe/invoices/186' resource is unclear. The listing is effectively a stub with confirmed 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'0.02':108,141 '000':98 '0x8335':103 '20':97 '300':122 '402':191 '6':113 'Base network API' 'USDC micropayment API' 'accept':127 'access':36,155 'across':55 'advertis':135 'ai/ml':58 'analyt':57 'api':35,54,146 'appear':80 'application/json':132 'avail':178 'base':8,22,68,99,105 'base-network' 'behind':37 'beyond':164 'broader':47 'call':12,26 'challeng':41,91,192 'confirm':185 'connect':166 'cost':95 'crawl':181 'data':56 'decim':114 'detail':170 'doc':158 'document':156 'empti':163 'endpoint':6,20,30,78,126,183 'equal':107 'exact':119 'exampl':175 'finance/web3':60 'gate':3,17 'indic':92 'infer':59 'infrastructur':62 'instant':154 'invoic':5,19,86 'invoice-rel':85 'json-response' 'key':147 'larg':162 'limit':150 'live':186 'lowpaymentfee' 'lowpaymentfee.com':32 'maximum':94 'minimum':152 'model':139 'network':69 'no-api-key' 'offer':49 'page':157 'part':44 'pay':10,24,51 'pay-per-cal':9,23 'pay-per-call endpoint' 'pay-per-request':50 'payment':40,116 'per':11,25,52,109,142 'platform':48,134 'post':128 'premium':34 'price':138,159 'probe':194 'prompt':168 'proper':190 'protocol':75 'provid':33 'rate':149 'readm':160 'relat':87 'request':53,110,129,143 'request/response':171 'resourc':88 'return':131,188 'schema':172 'scheme':117 'second':123 'settl':65 'simpl':137 'specif':77 'stripe':4,18,84 'stripe invoice API' 'stripe-invoices' 'timeout':124 'unit':100 'usag':174 'usdc':14,28,71,102,111 'usdc-settlement' 'use':70,112 'util':63 'via':72 'wallet':167 'x402':2,16,39,74,90 'x402 paid API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"1fbdf4d5-7ce4-4875-b7f8-9f279f1bbd3f","listingId":"bfaac3d4-133a-45bd-ac20-4fdf623f9dce","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/186","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:55.917Z"}],"sources":[{"listingId":"bfaac3d4-133a-45bd-ac20-4fdf623f9dce","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/186","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:55.917Z","lastSeenAt":"2026-04-25T08:33:11.514Z"}],"details":{"listingId":"bfaac3d4-133a-45bd-ac20-4fdf623f9dce","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/186 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The platform charges $0.02 per request with no API keys, no rate limits, and no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge specifies maxAmountRequired of 20000 base units of USDC on Base with a 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/186"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/186"}],"useCases":["Programmatically accessing Stripe invoice data via a pay-per-call model","Integrating invoice retrieval into agent workflows without API key management","Paying for API access with USDC on Base without subscriptions"],"bestFor":["Agents or developers who want keyless, pay-per-use API access","Users who prefer crypto-native (USDC on Base) payment for API calls","Low-volume or sporadic usage where per-request billing is more economical"],"notFor":["High-volume users who need bulk pricing or subscription discounts","Users who need detailed API documentation and request/response schemas upfront","Anyone unable to settle payments in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.192Z"},"updatedAt":"2026-04-25T08:33:11.514Z"}}