{"id":"0fc69242-743c-42f7-b659-b88254dec194","shortId":"PjhmQ2","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 payment wall. It is part of a broader platform that offers dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all settled on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/invoices/3` accepts POST requests and is gated by an x402 challenge requiring up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call. Payment is made via the x402 \"exact\" scheme to the wallet address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a timeout of 300 seconds. The response MIME type is `application/json`.\n\nThe platform advertises a flat $0.02 per request across all its endpoints, with no API keys, no rate limits, and instant access. However, documentation 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 description of what the Stripe invoices endpoint actually returns or what input it expects. The endpoint name suggests it may retrieve or interact with Stripe invoice data, but this is speculative given the lack of documentation.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-billing","stripe-invoices","json-response","post-method"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid API","USDC micropayment API","pay-per-call API","Base network API","lowpaymentfee","crypto payment gateway"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or input/output schema provided; request body format is unknown","Endpoint purpose ('stripe/invoices/3') is unclear — it may return Stripe invoice data but this is unconfirmed","The hardcoded '/3' in the path suggests a specific resource ID, which may limit general usefulness"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/3","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/3","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 ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation beyond a wallet-connect prompt, no request/response examples, and no explanation of what the endpoint actually does. The listing name 'Premium API Access' is generic and 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'0.02':99,138 '000':94 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':120 '20':93 '300':125 '6':104 'Base network API' 'USDC micropayment API' 'accept':80 'access':36,154 'across':141 'actual':195 'address':119 'advertis':135 'ai/ml':61 'analyt':60 'api':35,57,147,162 'application/json':132 'base':8,22,72,95 'base-network' 'behind':37 'broader':47 'call':12,26,107 'challeng':89 'connect':171 'content':177 'crypto payment gateway' 'data':59,64,214 'decim':105 'descript':188 'doc':161 'document':156,223 'dozen':51 'endpoint':6,20,30,78,144,194,203 'exact':114 'exampl':185 'expect':201 'extrem':158 'finance/web3':63 'flat':137 'gate':3,17,85 'given':219 'howev':155 'infer':62 'input':199 'instant':153 'interact':210 'invoic':5,19,193,213 'json-response' 'key':148 'lack':221 'limit':151 'lowpaymentfee' 'lowpaymentfee.com':32 'made':110 'may':207 'mime':129 'name':204 'network':73 'offer':50 'openapi':181 'page':166 'paid':9,23 'part':44 'pay':54 'pay-per-call API' 'pay-per-request':53 'payment':40,108 'per':11,25,55,106,139 'per-cal':10,24 'per-request-billing' 'platform':48,134 'post':81 'post-method' 'premium':34 'price':163 'prompt':173 'provid':33 'rate':150 'readm':165 'render':168 'request':56,82,140 'request/response':184 'requir':90 'respons':128 'retriev':208 'return':196 'schema':182 'scheme':115 'second':126 'servic':67 'settl':69 'sinc':101 'span':58 'spars':159 'specif':77 'specul':218 'stripe':4,18,192,212 'stripe invoice API' 'stripe-invoices' 'suggest':205 'timeout':123 'type':130 'unit':96 'usd':100 'usdc':14,28,75,98,102 'usdc-settlement' 'use':74,103 'util':66 'via':111 'wall':41 'wallet':118,172 'x402':2,16,39,88,113 'x402 paid API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"dc11d750-93fe-49ef-b714-30a70611fdc6","listingId":"0fc69242-743c-42f7-b659-b88254dec194","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/3","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:48.043Z"}],"sources":[{"listingId":"0fc69242-743c-42f7-b659-b88254dec194","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/3","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:48.043Z","lastSeenAt":"2026-04-25T11:32:47.274Z"}],"details":{"listingId":"0fc69242-743c-42f7-b659-b88254dec194","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/3 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/3"},{"claim":"The platform advertises $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 contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/3"}],"useCases":["Retrieving or interacting with Stripe invoice data via a crypto-settled pay-per-call model","Agent-driven invoice lookups without traditional API key management","Programmatic access to invoice information settled in USDC on Base"],"bestFor":["Developers wanting keyless, pay-per-request access to invoice data","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Anyone needing detailed API documentation or request/response schemas before integrating","High-volume use cases where $0.02 per request adds up significantly","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.526Z"},"updatedAt":"2026-04-25T11:32:47.274Z"}}