{"id":"763a91ad-74cc-4639-ba47-9d79449bf494","shortId":"267fq8","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 exposes a specific Stripe invoice resource (`/api/v1/stripe/invoices/134`) behind an x402 paywall. The provider operates a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all settled on the Base network using USDC via the x402 protocol.\n\nThe specific endpoint listed here is labeled \"Premium API Access\" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC with 6 decimals). It accepts HTTP POST requests and returns `application/json`. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, using the USDC contract at `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. The x402 challenge specifies a 300-second payment timeout.\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 spec, no request/response schema documentation, and no explanation of what data the Stripe invoice endpoint actually returns. The provider's landing page confirms the $0.02/request pricing model and advertises no API keys, no rate limits, and instant access, but gives no detail about the specific invoice endpoint's behavior or required POST body.","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' with no content.","No request body schema or response schema provided; it is unclear what POST body is expected or what data is returned.","This endpoint targets a single hardcoded invoice ID (134); unclear if this is a demo or production resource.","No OpenAPI or ai-plugin manifest found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/134","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/134","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/request in USDC on Base). However, there is no documentation, no OpenAPI spec, no request body schema, no response schema, and no explanation of what the endpoint actually returns. The docs/pricing/API pages are all empty wallet-connect stubs. This is effectively a stub 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'/request':190 '0.02':94,189 '000':100 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':121 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':129 '20':99 '300':135 '6':106 'Base network API' 'USDC micropayment API' 'accept':109 'access':89,203 'actual':180 'address':120 'advertis':194 'ai/ml':61 'analyt':60 'api':57,88,145,196 'application/json':115 'base':8,22,72,101,123 'base-network' 'behavior':214 'behind':40 'bodi':218 'broader':48 'call':12,26,56 'challeng':132 'confirm':187 'connect':154 'content':160 'contract':127 'cost':91 'crypto':64 'data':59,175 'decim':107 'detail':207 'doc':144 'document':139,169 'dozen':51 'endpoint':6,20,30,82,179,212 'explan':172 'expos':33 'extrem':141 'financ':63 'gate':3,17 'give':205 'http':110 'infer':62 'instant':202 'invoic':5,19,37,178,211 'key':197 'label':86 'land':185 'limit':200 'list':83 'lowpaymentfee' 'lowpaymentfee.com':32 'made':118 'maxamountrequir':97 'model':192 'network':73 'no-api-key' 'offer':50 'openapi':164 'oper':46 'page':149,186 'pay':9,23,54 'pay-per-cal':53 'pay-per-call' 'pay-per-request endpoint' 'payment':116,137 'paywal':43 'per':11,25,55,95 'per-cal':10,24 'platform':49 'post':111,217 'premium':87 'price':146,191 'prompt':156 'protocol':79 'provid':45,183 'rate':199 'readm':148 'render':151 'request':96,112 'request/response':167 'requir':216 'resourc':38 'return':114,181 'schema':168 'second':136 'servic':67 'settl':69 'span':58 'spars':142 'spec':165 'specif':35,81,210 'specifi':133 'stripe':4,18,36,177 'stripe invoice API' 'stripe-invoice-access' 'timeout':138 'unit':102 'usdc':14,28,75,104,126 'usdc-settlement' 'use':74,124 'util':66 'via':76 'wallet':155 'x402':2,16,42,78,131 'x402 paid API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"995616ba-b808-4d8d-806f-db6a94885ad1","listingId":"763a91ad-74cc-4639-ba47-9d79449bf494","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/134","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:38.442Z"}],"sources":[{"listingId":"763a91ad-74cc-4639-ba47-9d79449bf494","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/134","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:38.442Z","lastSeenAt":"2026-04-25T13:03:04.147Z"}],"details":{"listingId":"763a91ad-74cc-4639-ba47-9d79449bf494","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/134 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 advertising USDC on Base at maxAmountRequired 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/134"},{"claim":"Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/134"}],"useCases":["Retrieving Stripe invoice data via a per-call USDC micropayment","Programmatic access to invoice #134 without traditional API key management","Agent-driven financial data retrieval settled on Base L2"],"bestFor":["Developers who want keyless, pay-per-call access to Stripe invoice data","AI agents that can settle x402 payments in USDC on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Anyone needing detailed API documentation or request/response schemas before integrating","Bulk invoice retrieval across many invoice IDs (this endpoint targets a single invoice)","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.945Z"},"updatedAt":"2026-04-25T13:03:04.147Z"}}