{"id":"47694f20-7003-4f98-bfba-ad67605e9232","shortId":"enUzYT","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 \"Premium API Access\" behind an x402 payment challenge. The specific resource path (`/api/v1/stripe/invoices/95`) suggests it returns or processes a Stripe invoice identified by ID 95. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 \"exact\" scheme. The maximum amount required per call is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). The endpoint accepts HTTP POST requests and returns application/json.\n\nThe parent site lowpaymentfee.com hosts a broader catalog of pay-per-request APIs spanning 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 priced at $0.02 per request with no API keys, no rate limits, and no commitments. However, the specific endpoint being listed here is scoped to the Stripe invoices resource. Documentation pages (/docs, /api, /pricing, /README) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual request/response schema for this invoice endpoint is unknown beyond what the x402 challenge reveals.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","stripe-invoices","pay-per-request","no-api-key","json-response"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 invoice endpoint","pay-per-call invoice","USDC API payment","Base network API","lowpaymentfee","micro-payment API"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no content","Request body schema and response schema are completely unknown","The specific functionality of /api/v1/stripe/invoices/95 is unclear — it may be a demo or placeholder","No OpenAPI spec, no ai-plugin manifest, no agents.txt found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/95","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/95","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 per call in USDC on Base). However, there is no documentation, no request/response schema, and no examples available — the docs, API, pricing, and README pages all return only a wallet-connect prompt. The purpose of this specific invoice endpoint is unclear beyond its path 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'/api/v1/stripe/invoices/95':46 '/docs':174 '/pricing':176 '/readme':177 '0.02':91,145 '000':84 '0x8335':69 '20':83 '2913':70 '6':94 '95':58 'Base network API' 'USDC API payment' 'accept':98 'access':36 'actual':191 'ai/ml':121 'amount':78 'api':35,118,150 'application/json':104 'base':8,22,64,85 'base-network' 'behind':37 'beyond':200 'broader':111 'call':12,26,81 'catalog':112 'challeng':41,204 'classif':124 'commit':157 'connect':182 'content':188 'contract':68 'convers':140 'data/analytics':120 'decim':95 'document':172 'embed':125 'endpoint':6,20,30,97,161,197 'equal':90 'estim':134 'exact':74 'exchang':129 'feed':128 'finance/web3':126 'gas':133 'gate':3,17 'generat':141 'geocod':138 'host':109 'howev':158 'http':99 'id':57 'identifi':55 'infrastructur':136 'invoic':5,19,54,170,196 'json-response' 'key':151 'limit':154 'list':163 'lowpaymentfee' 'lowpaymentfee.com':32,108 'maximum':77 'micro-payment API' 'network':65 'no-api-key' 'page':173 'parent':106 'path':45 'pay':10,24,115 'pay-per-cal':9,23 'pay-per-call invoice' 'pay-per-request':114 'payment':40,59 'per':11,25,80,116,146 'post':100 'premium':34 'price':127,143 'process':51 'prompt':184 'provid':33 'quot':132 'rate':130,153 'request':101,117,147 'request/response':192 'requir':79 'resourc':44,171 'return':49,103,179 'reveal':205 'schema':193 'scheme':75 'scope':166 'sentiment':122 'settl':61 'site':107 'span':119 'specif':43,160 'stripe':4,18,53,169 'stripe invoice API' 'stripe-invoices' 'substant':187 'suggest':47 'summar':123 'token':131 'unit':86 'unknown':199 'usdc':14,28,67,88,92 'usdc-settlement' 'use':66,93 'util':137 'valid':139 'via':71 'wallet':183 'x402':2,16,39,73,203 'x402 invoice endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"f362e5a0-87be-49e8-83ac-974b0a900c3e","listingId":"47694f20-7003-4f98-bfba-ad67605e9232","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/95","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:12.694Z"}],"sources":[{"listingId":"47694f20-7003-4f98-bfba-ad67605e9232","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/95","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:12.694Z","lastSeenAt":"2026-04-25T05:33:15.757Z"}],"details":{"listingId":"47694f20-7003-4f98-bfba-ad67605e9232","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/95 \\\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 x402 challenge requires a maximum of 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/95"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/95"},{"claim":"All APIs on the site are priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"The site offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving or processing a specific Stripe invoice via a single paid API call","Integrating invoice data into agent workflows without needing API keys or subscriptions","Demonstrating x402 payment-gated API access on Base with USDC"],"bestFor":["Agents or developers who want keyless, pay-per-call access to invoice data","Exploring x402 protocol integrations on the Base network","Low-volume, on-demand invoice lookups without subscription overhead"],"notFor":["High-volume invoice processing where per-call fees add up quickly","Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:50.309Z"},"updatedAt":"2026-04-25T05:33:15.757Z"}}