{"id":"6ef8e97e-fe25-43a9-8a8e-e2db8377d4e1","shortId":"Hpaw8G","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, paying per-call in USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, paying per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a Stripe invoice resource (invoice ID 24) behind an x402 paywall. The provider operates a broader platform offering dozens of pay-per-call API endpoints across categories including data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all settled on the Base network using USDC via the x402 protocol.\n\nThe specific endpoint `/api/v1/stripe/invoices/24` is labeled \"Premium API Access\" and accepts POST requests. The x402 challenge confirms it is live, requiring a maximum payment of 20,000 base units of USDC (0.02 USD) per request on the Base L2 network. The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout window.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no explanation of what data the invoice endpoint actually returns. The platform's landing page advertises $0.02/request pricing across all endpoints with no API keys, no rate limits, and instant access, but provides no technical documentation beyond endpoint names and short labels.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoice-access","pay-per-call","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid API","USDC micropayment API","Base network API","pay-per-request endpoint","lowpaymentfee"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided; impossible to know what the endpoint returns","The endpoint path references a specific invoice ID (24); unclear if this is a demo or a real resource","No information on error handling, response format, or data fields"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/24","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/24","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is essentially no documentation — no OpenAPI schema, no request/response examples, and no explanation of what the endpoint returns. The docs pages are empty beyond a wallet-connect prompt. The endpoint's purpose ('Premium API Access' for a Stripe invoice) is 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'/request':187 '0.02':117,186 '000':112 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':132 '20':111 '24':42 '300':135 'Base network API' 'USDC micropayment API' 'accept':96 'access':34,94,201 'across':62,189 'actual':178 'address':131 'advertis':185 'ai/ml':67 'analyt':66 'api':60,93,145,194 'base':8,22,78,113,123 'base-network' 'behind':43 'beyond':207 'broader':51 'call':12,26,59 'categori':63 'challeng':101 'confirm':102 'connect':154 'content':160 'data':65,70,174 'doc':144 'document':139,206 'dozen':54 'endpoint':6,20,30,61,88,177,191,208 'exampl':168 'explan':171 'extrem':141 'finance/web3':69 'gate':3,17 'id':41 'includ':64 'infer':68 'infrastructur':72 'instant':200 'invoic':5,19,38,40,176 'key':195 'l2':124 'label':91,212 'land':183 'limit':198 'live':105 'lowpaymentfee' 'lowpaymentfee.com':32 'maximum':108 'name':209 'network':79,125 'no-api-key' 'offer':53 'openapi':164 'oper':49 'page':149,184 'pay':9,23,57 'pay-per-cal':56 'pay-per-call' 'pay-per-request endpoint' 'payment':109,127 'paywal':46 'per':11,25,58,119 'per-cal':10,24 'platform':52,181 'post':97 'premium':92 'price':146,188 'prompt':156 'protocol':85 'provid':33,48,203 'rate':197 'readm':148 'render':151 'request':98,120 'request/response':167 'requir':106 'resourc':39 'return':179 'schema':165 'second':136 'sent':129 'settl':75 'short':211 'spars':142 'specif':87 'stripe':4,18,37 'stripe invoice API' 'stripe-invoice-access' 'technic':205 'timeout':137 'unit':114 'usd':118 'usdc':14,28,81,116 'usdc-settlement' 'use':80 'util':73 'via':82 'wallet':155 'window':138 'x402':2,16,45,84,100 'x402 paid API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"928541cf-5f47-4ab0-b452-45965dad25db","listingId":"6ef8e97e-fe25-43a9-8a8e-e2db8377d4e1","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/24","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:46.847Z"}],"sources":[{"listingId":"6ef8e97e-fe25-43a9-8a8e-e2db8377d4e1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/24","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:46.847Z","lastSeenAt":"2026-04-25T11:32:47.220Z"}],"details":{"listingId":"6ef8e97e-fe25-43a9-8a8e-e2db8377d4e1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/24\n# Returns 402 with x402 challenge; attach X-PAYMENT header with valid USDC payment on Base to access.","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge requires a maximum of 20,000 base units of USDC (0.02 USD) on the Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/24"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/24"},{"claim":"Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/24"}],"useCases":["Retrieving Stripe invoice data via a single paid API call","Programmatic access to invoice #24 without traditional API key management","Agent-driven invoice retrieval settled in USDC on Base"],"bestFor":["Agents or services that need on-demand Stripe invoice data without subscription commitments","Developers experimenting with x402 payment flows on Base","Scenarios requiring keyless, pay-per-call API access"],"notFor":["Production use cases requiring documented request/response schemas","Bulk invoice retrieval or batch processing (no documented batch support)","Users who need non-crypto payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.583Z"},"updatedAt":"2026-04-25T11:32:47.220Z"}}