{"id":"36fa26f5-e984-4deb-97c4-e20eeb8b84b9","shortId":"aABPNB","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 access to a Stripe invoice resource (invoice ID 101) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all gated via the x402 protocol on the Base network and settled in USDC.\n\nThe specific endpoint `/api/v1/stripe/invoices/101` is labeled \"Premium API Access\" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). Payment is made via the x402 exact scheme: callers attach an X-PAYMENT header with a signed USDC payment on Base to the payTo address. No API keys, rate limits, or upfront commitments are required — access is instant upon valid payment. The response MIME type is application/json.\n\nDocumentation on the site is extremely sparse. The /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The exact data returned by this invoice endpoint is unknown — it could be Stripe invoice details, a receipt, or something else entirely. The endpoint is confirmed live (402 challenge captured successfully).","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","stripe-invoice","json-response"],"categories":["finance","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment","Base network API","Stripe invoice API","lowpaymentfee","crypto-gated endpoint"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet' with no content","No OpenAPI spec or request/response schema provided","The exact data returned by this endpoint is unknown; 'Premium API Access' is a generic label","The broader platform lists many endpoints but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/101","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/101","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 with clear pricing, but there is zero documentation on request parameters, response schema, or what data the endpoint actually returns. The docs pages are all empty wallet-connect stubs. The endpoint path suggests Stripe invoice data but this is 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'/api/v1/stripe/invoices/101':89 '/docs':170 '/pricing':171 '/readme':174 '0.02':99,113 '000':105 '101':42 '20':104 '402':228 '6':111 'Base network API' 'Stripe invoice API' 'USDC micropayment' 'access':34,94,150 'address':139 'ai/ml':65 'analyt':64 'api':61,93,141 'application/json':161 'attach':123 'avail':200 'base':8,22,80,106,135 'base-network' 'behind':43 'broader':52 'call':12,26 'caller':122 'captur':230 'challeng':229 'commit':147 'confirm':226 'connect':180 'content':186 'cost':96 'could':212 'crypto-gated endpoint' 'data':63,68,203 'decim':112 'detail':216 'document':162,195 'dozen':55 'els':221 'endpoint':6,20,30,88,208,224 'entir':222 'exact':120,202 'exampl':198 'extrem':167 'finance/web3':67 'gate':3,17,73 'header':128 'id':41 'infer':66 'instant':152 'invoic':5,19,38,40,207,215 'json-response' 'key':142 'label':91 'limit':144 'live':227 'lowpaymentfee' 'lowpaymentfee.com':32 'made':116 'maxamountrequir':102 'mime':158 'network':81 'offer':54 'openapi':190 'page':175 'part':49 'pay':10,24,58 'pay-per-cal':9,23 'pay-per-call API' 'pay-per-request':57 'payload':199 'payment':114,127,133,155 'payto':138 'paywal':46 'per':11,25,59,100 'platform':53 'premium':92 'prompt':182 'protocol':77 'provid':33 'rate':143 'receipt':218 'render':177 'request':60,101 'request/response':193 'requir':149 'resourc':39 'respons':157 'return':204 'schema':194 'scheme':121 'servic':71 'settl':83 'sign':131 'site':165 'someth':220 'span':62 'spars':168 'spec':191 'specif':87 'stripe':4,18,37,214 'stripe-invoice' 'success':231 'type':159 'unit':107 'unknown':210 'upfront':146 'upon':153 'usdc':14,28,85,109,132 'usdc-settlement' 'util':70 'valid':154 'via':74,117 'wallet':181 'x':126 'x-payment':125 'x402':2,16,45,76,119 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"79142abb-0cb6-4306-bb97-2fea2d86d855","listingId":"36fa26f5-e984-4deb-97c4-e20eeb8b84b9","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/101","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:24.686Z"}],"sources":[{"listingId":"36fa26f5-e984-4deb-97c4-e20eeb8b84b9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/101","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:24.686Z","lastSeenAt":"2026-04-25T15:32:41.214Z"}],"details":{"listingId":"36fa26f5-e984-4deb-97c4-e20eeb8b84b9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/101 \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge, maxAmountRequired 20000 USDC base units on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/101"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/101"},{"claim":"Docs, pricing, API, and README pages contain only 'Connect wallet' with no documentation","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving Stripe invoice data without API key management","Agent-driven payment-per-request access to invoice records","Programmatic access to invoice #101 via crypto micropayment"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or schemas before integrating","Bulk invoice retrieval across many records (only invoice 101 is exposed at this path)","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:52.647Z"},"updatedAt":"2026-04-25T15:32:41.214Z"}}