{"id":"75daecd3-392a-416a-8bc7-0ca490aca91f","shortId":"vZs3JD","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 (invoice ID 72). It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all priced at $0.02 per call and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/invoices/72` is labeled \"Premium API Access\" and accepts POST requests. Payment is handled via the x402 protocol: callers receive a 402 challenge containing the USDC asset address on Base (0x8335…2913), a payTo address, and a maxAmountRequired of 20000 base units (i.e., $0.02 given USDC's 6 decimals). No API keys or rate limits are advertised; access is gated purely by per-request micropayment.\n\nThe platform's landing page lists additional endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. However, documentation pages (/docs, /api, /pricing, /README) returned only a \"Connect wallet\" prompt with no substantive content, so the actual behavior and response schema of this specific invoice endpoint remain unclear.","tags":[],"capabilities":["x402-payment","usdc-base","stripe-invoices","pay-per-request","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 micropayment","USDC payment API","pay-per-call API","Base network API","lowpaymentfee"],"warnings":["No API documentation available — /docs, /api, /pricing, and /README all return only a 'Connect wallet' prompt with no substantive content.","The response schema and actual payload of this endpoint are completely unknown.","The endpoint path references a specific Stripe invoice ID (72); it is unclear whether this is a demo, a fixed resource, or parameterizable.","The description 'Premium API Access' is generic and does not explain what the endpoint actually returns."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/72","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/72","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 response schema, no example responses, and the purpose of a 'Stripe invoices/72' endpoint is ambiguous. All doc pages returned only 'Connect wallet' with no 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'/api/v1/stripe/invoices/72':84 '/docs':193 '/pricing':195 '/readme':196 '/request':187 '0.02':10,24,70,126,186 '0x8335':113 '20000':122 '2913':114 '402':104 '6':130 '72':45 'Base network API' 'USDC payment API' 'accept':91 'access':37,89,140 'across':59 'actual':209 'addit':155 'address':110,117 'advertis':139 'ai/ml':62 'analysi':164 'analyt':61 'api':58,88,133 'asset':109 'base':8,22,79,112,123 'behavior':210 'broader':51 'call':72 'caller':101 'categori':66 'challeng':105 'classif':167 'connect':200 'contain':106 'content':206 'convers':179 'data':60,160 'decim':131 'document':191 'embed':168 'endpoint':6,20,30,83,156,218 'estim':176 'exchang':171 'export':161 'feed':170 'finance/web3':63 'gas':175 'gate':3,17,142 'generat':181 'geocod':177 'given':127 'handl':96 'howev':190 'i.e':125 'id':44 'infrastructur':65 'insight':162 'invoic':5,19,41,43,217 'key':134 'label':86 'land':152 'limit':137 'list':154 'lowpaymentfee' 'lowpaymentfee.com':32 'maxamountrequir':120 'metric':158 'micropay':148 'network':80 'no-api-key' 'offer':53 'page':153,192 'part':48 'pay':9,23,55 'pay-per-call API' 'pay-per-request':54 'payment':94 'payto':116 'per':11,25,56,71,146 'per-request':145 'platform':52,150 'point':189 'post':92 'premium':87 'price':68,169,188 'prompt':202 'protocol':36,100 'provid':33 'pure':143 'quot':174 'rate':136,172 'receiv':102 'remain':219 'report':159 'request':12,26,57,93,147 'resourc':42 'respons':212 'return':197 'schema':213 'sentiment':163 'settl':74 'specif':82,216 'stripe':4,18,40 'stripe invoice API' 'stripe-invoices' 'substant':205 'summar':166 'text':165 'token':173 'unclear':220 'unit':124 'usdc':14,28,76,108,128 'usdc-base' 'valid':178 'via':97 'wallet':201 'x402':2,16,35,99 'x402 micropayment' 'x402-gated':1,15 'x402-payment' 'x402-protocol':34","prices":[{"id":"cff2c8be-946f-41da-bd25-de31c8a208e6","listingId":"75daecd3-392a-416a-8bc7-0ca490aca91f","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/72","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:01.320Z"}],"sources":[{"listingId":"75daecd3-392a-416a-8bc7-0ca490aca91f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/72","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:01.320Z","lastSeenAt":"2026-04-25T08:33:11.768Z"}],"details":{"listingId":"75daecd3-392a-416a-8bc7-0ca490aca91f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/72\n# Returns 402 with x402 challenge. Supply X-PAYMENT header with valid USDC payment proof on Base to access the resource.","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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/72"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/72"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving or interacting with a Stripe invoice via micropayment-gated access","Programmatic invoice lookup without traditional API key management","Agent-driven payment workflows where per-call USDC settlement is preferred"],"bestFor":["Agents or bots that can settle x402 USDC payments on Base","Developers wanting keyless, pay-as-you-go access to Stripe invoice data","Exploring x402 protocol integration patterns"],"notFor":["Users needing detailed API documentation or response schema before calling","High-volume invoice processing where per-request fees add up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.888Z"},"updatedAt":"2026-04-25T08:33:11.768Z"}}