{"id":"0794eed1-f115-49ad-a914-549f49960220","shortId":"Jt287C","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. The specific resource path (`/api/v1/stripe/invoices/154`) suggests it returns or processes a Stripe invoice record. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 \"exact\" scheme.\n\nThe x402 challenge indicates a maximum cost of 20,000 base units of USDC. Since USDC uses 6 decimals, this converts to $0.02 per request — consistent with the provider's site-wide pricing of $0.02/request across all endpoints. The provider advertises no API keys, no rate limits, and instant access. The endpoint accepts HTTP POST and returns application/json.\n\nThe broader lowpaymentfee.com platform hosts multiple API categories including data/analytics, AI/ML (sentiment, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all at the same $0.02/request price point. However, this specific listing covers only the `/api/v1/stripe/invoices/154` endpoint. Documentation pages (/docs, /pricing, /api, /README) returned no meaningful content beyond a wallet-connect prompt, so the actual request/response schema for this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoice","json-response","per-call-pricing"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 paid endpoint","USDC micropayment API","Base network API","pay-per-call invoice","lowpaymentfee"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README pages are effectively empty","Request body schema and response schema are completely unknown","The endpoint path references a specific invoice ID (154), which may be a static demo resource rather than a general-purpose API","Provider site lists many endpoint categories but none match this specific Stripe invoices path"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/154","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/154","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 request/response schema, and the purpose of this specific invoice endpoint is unclear. All doc pages returned only a wallet-connect prompt with no 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'/api/v1/stripe/invoices/154':46,179 '/docs':183 '/pricing':184 '/readme':186 '/request':109,169 '0.02':95,108,168 '000':82 '0x8335':66 '20':81 '2913':67 '6':90 'Base network API' 'USDC micropayment API' 'accept':127 'access':36,124 'across':110 'actual':199 'advertis':115 'ai/ml':143 'api':35,117,139 'application/json':132 'base':8,22,61,83 'base-network' 'behind':37 'beyond':191 'broader':134 'call':12,26 'categori':140 'challeng':75 'classif':146 'connect':195 'consist':98 'content':190 'contract':65 'convers':162 'convert':93 'cost':79 'cover':176 'data/analytics':142 'decim':91 'document':181 'embed':147 'endpoint':6,20,30,112,126,180,204 'estim':156 'exact':71 'exchang':151 'feed':150 'finance/web3':148 'gas':155 'gate':3,17 'generat':163 'geocod':160 'host':137 'howev':172 'http':128 'includ':141 'indic':76 'infrastructur':158 'instant':123 'invoic':5,19,54 'json-response' 'key':118 'limit':121 'list':175 'lowpaymentfee' 'lowpaymentfee.com':32,135 'maximum':78 'meaning':189 'multipl':138 'network':62 'page':182 'paid':9,23 'path':45 'pay-per-call invoice' 'payment':40,56 'per':11,25,96 'per-cal':10,24 'per-call-pricing' 'platform':136 'point':171 'post':129 'premium':34 'price':106,149,170 'process':51 'prompt':196 'provid':33,101,114 'quot':154 'rate':120,152 'record':55 'request':97 'request/response':200 'resourc':44 'return':49,131,187 'schema':201 'scheme':72 'sentiment':144 'settl':58 'sinc':87 'site':104 'site-wid':103 'specif':43,174 'stripe':4,18,53 'stripe invoice API' 'stripe-invoice' 'suggest':47 'summar':145 'token':153 'unit':84 'unknown':206 'usdc':14,28,64,86,88 'usdc-settlement' 'use':63,89 'util':159 'valid':161 'via':68 'wall':41 'wallet':194 'wallet-connect':193 'wide':105 'x402':2,16,39,70,74 'x402 paid endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"c9c6b784-ac2f-49da-b367-44e30a7e8713","listingId":"0794eed1-f115-49ad-a914-549f49960220","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/154","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:45.038Z"}],"sources":[{"listingId":"0794eed1-f115-49ad-a914-549f49960220","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/154","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:45.038Z","lastSeenAt":"2026-04-25T11:32:47.179Z"}],"details":{"listingId":"0794eed1-f115-49ad-a914-549f49960220","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/154 \\\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":"x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/154"},{"claim":"Site-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/154"}],"useCases":["Retrieving or processing a specific Stripe invoice via a crypto-paid API call","Demonstrating x402 payment protocol integration with USDC on Base","Agent-driven invoice lookup without traditional API key authentication"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-per-call access to invoice data","Projects already using USDC on Base for micropayments"],"notFor":["Production invoice management requiring bulk operations or webhooks","Users who need detailed API documentation and response schemas before integrating","Anyone needing free or subscription-based access rather than per-call crypto payments"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.639Z"},"updatedAt":"2026-04-25T11:32:47.179Z"}}