{"id":"1dcadd16-2cbe-48f5-98db-ea95d5c1acab","shortId":"PSCzvZ","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides x402-protocol access to a Stripe invoice resource. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utility categories — all gated behind x402 payment challenges settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/invoices/58` is labeled \"Premium API Access\" and returns an x402 challenge requiring up to 20,000 base units of USDC (0x8335…on Base, 6 decimals), which equals $0.02 per request. Payment is made via the x402 \"exact\" scheme to the specified payTo address, with a 300-second timeout. The endpoint accepts POST requests and returns application/json.\n\nThe platform advertises a uniform $0.02/request pricing model with no API keys, no rate limits, no minimums, and instant access. However, documentation pages (docs, pricing, README) all resolve to minimal \"Connect wallet\" stubs, so there is no detailed schema, request/response format documentation, or usage examples available. The actual behavior behind this particular invoice endpoint is unclear — it could return Stripe invoice data, trigger an invoice action, or serve as a demo/test endpoint. Without further documentation, the precise functionality must be treated as uncertain.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","stripe-invoices","json-api"],"categories":["finance","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Stripe invoice API","Base network API","crypto-gated endpoint","lowpaymentfee"],"warnings":["All documentation pages (/docs, /pricing, /README, /api) return only 'Connect wallet' with no actual content","No OpenAPI or schema documentation available for any endpoint","The specific functionality of /api/v1/stripe/invoices/58 is undocumented — unclear whether it retrieves, creates, or modifies an invoice","No example requests or responses available anywhere in crawled material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/58","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/58","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but documentation pages are all empty stubs ('Connect wallet'). There is no OpenAPI spec, no request/response schema, and no explanation of what the endpoint actually returns. The purpose of 'Premium API Access' at a Stripe invoices path is 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'/request':144 '0.02':10,24,109,143 '000':97 '0x8335':102 '20':96 '300':127 '6':105 'Base network API' 'Stripe invoice API' 'USDC micropayment API' 'accept':132 'access':37,87,158 'across':56 'action':204 'actual':186 'address':124 'advertis':140 'ai/ml':59 'analyt':58 'api':55,86,149 'application/json':137 'avail':184 'base':8,22,77,98,104 'base-network' 'behavior':187 'behind':68,188 'broader':48 'categori':65 'challeng':71,92 'connect':169 'could':196 'crypto-gated endpoint' 'data':57,200 'decim':106 'demo/test':209 'detail':176 'doc':162 'document':160,180,213 'endpoint':6,20,30,81,131,192,210 'equal':108 'exact':118 'exampl':183 'finance/web3':61 'format':179 'function':216 'gate':3,17,67 'howev':159 'infer':60 'infrastructur':63 'instant':157 'invoic':5,19,41,191,199,203 'json-api' 'key':150 'label':84 'limit':153 'lowpaymentfee' 'lowpaymentfee.com':32 'made':114 'minim':168 'minimum':155 'model':146 'must':217 'network':78 'offer':50 'page':161 'part':45 'particular':190 'pay':9,23,52 'pay-per-call API' 'pay-per-request':51 'payment':70,112 'payto':123 'per':11,25,53,110 'platform':49,139 'post':133 'precis':215 'premium':85 'price':145,163 'protocol':36 'provid':33 'rate':152 'readm':164 'request':12,26,54,111,134 'request/response':178 'requir':93 'resolv':166 'resourc':42 'return':89,136,197 'schema':177 'scheme':119 'second':128 'serv':206 'settl':72 'specif':80 'specifi':122 'stripe':4,18,40,198 'stripe-invoices' 'stub':171 'timeout':129 'treat':219 'trigger':201 'uncertain':221 'unclear':194 'uniform':142 'unit':99 'usag':182 'usdc':14,28,74,101 'usdc-settlement' 'util':64 'via':115 'wallet':170 'without':211 'x402':2,16,35,69,91,117 'x402 API' 'x402-gated':1,15 'x402-payment' 'x402-protocol':34","prices":[{"id":"2483ec55-3618-414e-99b9-3013b5754ca3","listingId":"1dcadd16-2cbe-48f5-98db-ea95d5c1acab","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/58","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:04.935Z"}],"sources":[{"listingId":"1dcadd16-2cbe-48f5-98db-ea95d5c1acab","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/58","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:04.935Z","lastSeenAt":"2026-04-25T07:03:30.134Z"}],"details":{"listingId":"1dcadd16-2cbe-48f5-98db-ea95d5c1acab","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/58 \\\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":"Endpoint returns x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/58"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/58"},{"claim":"Documentation pages resolve to minimal 'Connect wallet' stubs","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to Stripe invoice data via crypto micropayments","Agent-driven invoice retrieval without API key management","Demonstrating x402 payment protocol integration on Base"],"bestFor":["Developers exploring x402 protocol integration","Agents needing keyless, pay-per-request API access","Projects that want to settle API costs in USDC on Base"],"notFor":["Production invoice workflows requiring documented schemas and SLAs","Users who need detailed API documentation or SDKs","High-volume use cases where per-request crypto settlement adds overhead"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.759Z"},"updatedAt":"2026-04-25T07:03:30.134Z"}}