{"id":"032d9d38-ae5b-4074-94c6-b8e4f785a512","shortId":"CQgmKR","kind":"x402","title":"x402-gated Stripe invoice endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated Stripe invoice endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides x402-protocol access to a Stripe invoice resource (invoice #196). It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories — all gated behind x402 payment challenges settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/invoices/196` is labeled \"Premium API Access\" and accepts POST requests. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 exact scheme to the specified payTo address, with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through on-chain micropayment.\n\nThe platform's documentation, pricing, and API reference pages appear to be behind a wallet-connect gate, so detailed request/response schemas are not available from the crawl. The endpoint's actual functionality beyond the \"Premium API Access\" label and Stripe invoice context is unclear — it may return invoice data or trigger invoice-related actions. The site lists many other endpoints at $0.02 each spanning sentiment analysis, text summarization, geocoding, price feeds, and more, all following the same x402 payment model.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","stripe-invoices","post-method","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["stripe invoice API","x402 micropayment","USDC payment API","pay-per-call API","Base network API","lowpaymentfee","402 payment required"],"warnings":["No request or response schema available — actual endpoint behavior is unknown","Documentation, pricing, and API reference pages are gated behind wallet connect and returned no useful content","The endpoint path references a specific invoice ID (196); unclear if this is a demo or a real resource","No OpenAPI spec or ai-plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/invoices/196","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/196","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","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 request/response examples, and the docs/pricing/API pages are all behind a wallet-connect wall yielding no useful content. The actual functionality of this specific invoice endpoint is unclear beyond its 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'0.02':10,24,111,216 '000':101 '0x8335':106 '196':44 '20':100 '300':133 '402 payment required' '6':116 'Base network API' 'USDC payment API' 'accept':89 'access':37,87,144,190 'across':58 'action':208 'actual':184 'address':130 'advertis':95,143 'ai/ml':61 'analysi':220 'analyt':60 'api':57,86,137,159,189 'appear':162 'avail':177 'base':8,22,77,102,108 'behind':68,165 'beyond':186 'broader':50 'categori':65 'chain':151 'challeng':71,94 'connect':169 'context':195 'cost':98 'crawl':180 'data':59,202 'decim':117 'detail':172 'document':156 'endpoint':6,20,30,81,182,214 'equal':110 'exact':124 'feed':225 'finance/web3':62 'follow':229 'function':185 'gate':3,17,67,170 'geocod':223 'grant':146 'infrastructur':64 'invoic':5,19,41,43,194,201,206 'invoice-rel':205 'key':138 'label':84,191 'limit':141 'list':211 'lowpaymentfee' 'lowpaymentfee.com':32 'made':120 'mani':212 'maximum':97 'may':199 'micropay':152 'model':234 'network':78 'no-api-key' 'offer':52 'on-chain':149 'page':161 'part':47 'pay':9,23,54 'pay-per-call API' 'pay-per-request':53 'payment':70,118,233 'payto':129 'per':11,25,55,112 'platform':51,154 'post':90 'post-method' 'premium':85,188 'price':157,224 'protocol':36 'provid':33 'pure':147 'rate':140 'refer':160 'relat':207 'request':12,26,56,91,113 'request/response':173 'resourc':42 'return':200 'schema':174 'scheme':125 'second':134 'sentiment':219 'settl':72 'site':210 'span':218 'specif':80 'specifi':128 'stripe':4,18,40,193 'stripe invoice API' 'stripe-invoices' 'summar':222 'text':221 'timeout':135 'trigger':204 'unclear':197 'unit':103 'usdc':14,28,74,105,114 'usdc-base' 'use':115 'via':121 'wallet':168 'wallet-connect':167 'x402':2,16,35,69,93,123,232 'x402 micropayment' 'x402-gated':1,15 'x402-payment' 'x402-protocol':34","prices":[{"id":"292af2d0-23fc-49c6-9085-23c6e9e512a1","listingId":"032d9d38-ae5b-4074-94c6-b8e4f785a512","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/196","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:55:55.317Z"}],"sources":[{"listingId":"032d9d38-ae5b-4074-94c6-b8e4f785a512","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/invoices/196","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:55:55.317Z","lastSeenAt":"2026-04-25T10:03:27.591Z"}],"details":{"listingId":"032d9d38-ae5b-4074-94c6-b8e4f785a512","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/invoices/196 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/196"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/invoices/196"},{"claim":"The platform offers APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving or interacting with Stripe invoice data via micropayment","Programmatic access to invoice #196 without traditional API key authentication","Agent-driven payment flows where per-call USDC settlement replaces subscriptions"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation before purchasing (docs are sparse)","High-volume batch processing where per-request fees add up","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:51.193Z"},"updatedAt":"2026-04-25T10:03:27.591Z"}}