{"id":"006c938e-db8e-485b-b597-25dc14c54020","shortId":"ppNR46","kind":"x402","title":"x402-gated premium API access on Base, paid per-call in USDC.","tagline":"x402-gated premium API access on Base, paid per-call in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is part of a broader platform offering multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all gated behind x402 micro-payments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/141` is listed as \"Premium API Access\" and returns a valid x402 challenge (HTTP 402) requesting payment of up to 20,000 base units of USDC (0.02 USD) per call. The asset address `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` corresponds to USDC on Base. Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a timeout of 300 seconds.\n\nThe platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, no minimums, and instant access. However, the actual functionality behind this particular \"Premium API Access\" endpoint is unclear — the endpoint path suggests a Stripe subscription resource, but no documentation, request/response schemas, or examples are available. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. Without knowing what data or service this endpoint returns upon successful payment, agents should treat this as a stub listing until more documentation surfaces.","tags":[],"capabilities":["x402-payment","usdc-base","per-call-micropayment","premium-api-access","no-api-key"],"categories":["api-gateway","payments"],"synonyms":["x402 API","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","premium subscription endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No request or response schema provided; unclear what data or service is delivered after payment","Endpoint path '/api/v1/stripe/subscriptions/141' suggests a Stripe subscription resource but no details are given","No OpenAPI spec, no ai-plugin manifest, no agents.txt found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/141","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/subscriptions/141","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, but there is no documentation, no request/response schema, and no explanation of what the endpoint actually returns upon successful payment. The docs and pricing pages are empty beyond a wallet-connect prompt. This is effectively a 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'0.02':107,141 '000':102 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':129 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':114 '20':101 '300':134 '402':95 'Base network API' 'USDC micropayment API' 'access':6,20,36,87,158,168 'across':144 'actual':161 'address':113,128 'advertis':138 'agent':219 'ai':56 'analyt':55 'api':5,19,35,51,86,149,167,191 'asset':112 'avail':188 'base':8,22,76,103,119 'behind':66,163 'broader':47 'call':12,26,110 'categori':52 'challeng':93 'connect':200 'content':206 'correspond':115 'data':54,210 'doc':190 'document':182,229 'endpoint':30,80,146,169,173,214 'exact':125 'exampl':186 'financ':59 'flat':140 'function':162 'gate':3,17,65 'howev':159 'http':94 'includ':53 'infrastructur':62 'instant':157 'key':150 'know':208 'learn':58 'limit':153 'list':83,226 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':57 'made':122 'micro':69 'micro-pay':68 'minimum':155 'multipl':50 'network':77 'no-api-key' 'offer':49 'page':195 'paid':9,23 'part':44 'particular':165 'path':174 'pay-per-call API' 'payment':40,70,97,120,218 'per':11,25,109,142 'per-cal':10,24 'per-call-micropayment' 'platform':48,137 'premium':4,18,34,85,166 'premium subscription endpoint' 'premium-api-access' 'price':192 'prompt':202 'protocol':41 'provid':33 'rate':152 'readm':194 'render':197 'request':96,143 'request/response':183 'resourc':179 'return':89,215 'schema':184 'scheme':126 'second':135 'servic':212 'settl':71 'specif':79 'stripe':177 'stub':225 'subscript':178 'substant':205 'success':217 'suggest':175 'surfac':230 'timeout':132 'treat':221 'unclear':171 'unit':104 'upon':216 'usd':108 'usdc':14,28,73,106,117 'usdc-base' 'util':63 'valid':91 'via':37,123 'wallet':201 'web3':60 'without':207 'x402':2,16,39,67,92 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"1ae025d5-0587-48ef-baf6-6d45d778e6f1","listingId":"006c938e-db8e-485b-b597-25dc14c54020","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/subscriptions/141","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:27.107Z"}],"sources":[{"listingId":"006c938e-db8e-485b-b597-25dc14c54020","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/141","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:27.107Z","lastSeenAt":"2026-04-22T16:31:55.973Z"}],"details":{"listingId":"006c938e-db8e-485b-b597-25dc14c54020","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/141 \\\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 endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/141"},{"claim":"The platform advertises $0.02/request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/141"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Paying per-call for premium API resources without traditional API keys","Integrating x402 micro-payment gated endpoints into agent workflows","Accessing premium data or services via USDC on Base"],"bestFor":["Agents or developers wanting keyless, pay-per-use API access","x402-compatible wallets and clients on the Base network","Micro-payment experimentation with USDC"],"notFor":["Users who need detailed API documentation or response schemas before purchasing","Anyone without a Base-compatible USDC wallet","High-volume use cases where $0.02/request adds up without clear value proposition"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.683Z"},"updatedAt":"2026-04-22T16:31:55.973Z"}}