{"id":"d1a7c531-91c4-4f0a-81f8-d38d0416c73a","shortId":"YXQdjh","kind":"x402","title":"x402-gated premium API endpoint on Base, paid per-call in USDC.","tagline":"x402-gated premium API endpoint on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com is one of many x402-protocol-gated API endpoints offered by the provider. The specific resource `/api/v1/stripe/charges/47` is labeled \"Premium API Access\" and accepts POST requests, settling payments in USDC on the Base network. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request), consistent with the provider's advertised flat $0.02/request pricing across all their endpoints.\n\nThe provider's landing page lists a broad catalog of endpoints spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02/request pricing with no API keys, no rate limits, and instant access via x402 payment headers on the Base network.\n\nHowever, the specific functionality behind this particular endpoint (`/stripe/charges/47`) is unclear. It does not appear in the provider's listed catalog of endpoints, and the name \"Premium API Access\" is generic. No OpenAPI schema, request/response examples, or detailed documentation were found — the docs, API, pricing, and README pages all rendered only a \"Connect wallet\" prompt with no substantive content. Without knowing what this endpoint actually returns, callers should treat it as experimental.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","post-method"],"categories":["payments","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","stripe charges API","402 payment required"],"warnings":["The specific functionality of /api/v1/stripe/charges/47 is undocumented and does not appear in the provider's listed API catalog.","No OpenAPI schema, request examples, or response examples are available.","All documentation pages (docs, API, pricing, README) returned only a 'Connect wallet' prompt with no substantive content.","The endpoint path references 'stripe/charges' which may imply Stripe payment processing, but this is unconfirmed."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/charges/47","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/charges/47","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 specific purpose of this endpoint is unknown. The docs pages are empty beyond a wallet-connect 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'/request':94,151 '/stripe/charges/47':179 '0.02':82,93,150 '000':77 '20':76 '402 payment required' 'Base network API' 'USDC micropayment endpoint' 'accept':57 'access':55,162,199 'across':96 'actual':235 'advertis':91 'ai':119 'analysi':123 'analyt':113 'api':5,19,41,54,155,198,214 'appear':185 'base':8,22,66,78,169 'base-network' 'behind':175 'broad':107 'call':12,26 'caller':237 'catalog':108,191 'challeng':70 'classif':126 'connect':223 'consist':86 'content':229 'convers':143 'cost':74 'data':112,116 'detail':208 'doc':213 'document':209 'embed':127 'endpoint':6,20,30,42,99,110,146,178,193,234 'estim':137 'exampl':206 'exchang':132 'experiment':242 'export':117 'feed':131 'financ':128 'flat':92 'found':211 'function':174 'gas':136 'gate':3,17,40 'generat':144 'generic':201 'geocod':141 'header':166 'howev':171 'indic':71 'infrastructur':139 'insight':118 'instant':161 'key':156 'know':231 'label':52 'land':103 'learn':121 'limit':159 'list':105,190 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':120 'mani':36 'maximum':73 'metric':114 'name':196 'network':67,170 'offer':43 'one':34 'openapi':203 'page':104,218 'paid':9,23 'particular':177 'pay-per-call API' 'payment':61,165 'per':11,25,84 'per-cal':10,24 'per-call-pricing' 'post':58 'post-method' 'premium':4,18,53,197 'price':95,130,152,215 'prompt':225 'protocol':39 'provid':46,89,101,188 'quot':135 'rate':133,158 'readm':217 'render':220 'report':115 'request':59,85 'request/response':205 'resourc':49 'return':236 'schema':204 'sentiment':122 'settl':60 'share':147 'span':111 'specif':48,173 'stripe charges API' 'substant':228 'summar':125 'text':124 'token':134 'treat':239 'unclear':181 'unit':79 'usd':83 'usdc':14,28,63,81 'usdc-settlement' 'util':140 'valid':142 'via':163 'wallet':224 'web3':129 'without':230 'x402':2,16,38,69,164 'x402 API' 'x402-gated':1,15 'x402-payment' 'x402-protocol-gated':37","prices":[{"id":"e9b14391-37b0-42d0-b762-e2cf4f5c80e6","listingId":"d1a7c531-91c4-4f0a-81f8-d38d0416c73a","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/charges/47","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:54:20.444Z"}],"sources":[{"listingId":"d1a7c531-91c4-4f0a-81f8-d38d0416c73a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/charges/47","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:54:20.444Z","lastSeenAt":"2026-04-23T00:32:07.515Z"}],"details":{"listingId":"d1a7c531-91c4-4f0a-81f8-d38d0416c73a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/charges/47 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The provider advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network.","source_url":"https://lowpaymentfee.com/api/v1/stripe/charges/47"},{"claim":"The provider lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic pay-per-call access to a premium API without API keys","Agent-driven workflows that need to pay for endpoint access on-the-fly using USDC on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","AI agents that need keyless, pay-as-you-go API access","Low-cost per-request usage without subscriptions or commitments"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone looking for a well-documented, specific-purpose API with known response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:55.803Z"},"updatedAt":"2026-04-23T00:32:07.515Z"}}