{"id":"a93a403e-8a45-4925-9577-d318e85aaf9d","shortId":"pY86ey","kind":"x402","title":"x402-gated premium API access on Base, paid per-request in USDC.","tagline":"x402-gated premium API access on Base, paid per-request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform are pay-per-request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint at `/api/v1/stripe/subscriptions/197` is labeled \"Premium API Access\" and requires payment of up to 20,000 base units of USDC on the Base network. Since USDC uses 6 decimals, this translates to $0.02 per request — consistent with the platform's uniform $0.02/request pricing. Payment is settled on-chain via the x402 exact scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a maximum timeout of 300 seconds.\n\nThe endpoint accepts HTTP POST requests and returns `application/json`. However, the exact functionality behind \"Premium API Access\" is not documented in the crawled material — the endpoint path suggests a Stripe subscription resource, but no schema, request parameters, or response format details are available. The platform's docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further documentation. Without additional information about what this specific endpoint returns or accepts, its practical utility is unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","http-post","json-response","pay-per-request","no-api-key"],"categories":["api-gateway","payments"],"synonyms":["premium API","x402 API","lowpaymentfee","USDC API access","pay-per-call API","Base network API","crypto-paid API"],"warnings":["No documentation available — all doc/pricing/API pages return only 'Connect wallet' with no content.","The actual functionality behind 'Premium API Access' is completely undocumented; the endpoint path suggests a Stripe subscription resource but this is unverified.","No request or response schema is provided; callers cannot know what to send or what to expect back.","No OpenAPI spec or AI plugin manifest found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/197","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/197","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what the endpoint actually does, no request/response schema, and no examples. The docs pages are empty. The endpoint path ('stripe/subscriptions/197') is opaque and 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'/request':136 '0.02':126,135 '000':109 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':151 '20':108 '300':157 '6':121 'Base network API' 'USDC API access' 'accept':161,231 'access':6,20,36,101,175 'addit':222 'address':150 'ai':63 'analyt':62 'api':5,19,35,58,83,100,174,208 'application/json':167 'avail':201 'base':8,22,110,116 'base-network' 'behind':172 'categori':59 'chain':143 'commit':90 'connect':214 'consist':129 'crawl':181 'crypto-paid API' 'data':61 'decim':122 'detail':199 'doc':205 'document':178,220 'endpoint':30,47,72,94,160,184,228 'exact':147,170 'financ':66 'format':198 'function':171 'gate':3,17 'host':54 'howev':168 'http':162 'http-post' 'includ':60 'inform':223 'infrastructur':69 'json-response' 'key':84 'label':98 'learn':65 'limit':87 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'mani':46 'materi':182 'maximum':154 'network':117 'no-api-key' 'offer':48 'on-chain':141 'one':44 'page':209 'paid':9,23 'paramet':195 'path':185 'pay':78 'pay-per-call API' 'pay-per-request':77 'payment':40,104,138 'per':11,25,79,127 'per-request':10,24 'platform':52,75,132,203 'post':163 'practic':233 'premium':4,18,34,99,173 'premium API' 'price':137,206 'prompt':216 'protocol':41 'provid':33 'rate':86 'request':12,26,80,128,164,194 'requir':91,103 'resourc':190 'respons':197 'return':166,211,229 'schema':193 'scheme':148 'second':158 'settl':140 'sinc':118 'specif':93,227 'stripe':188 'subscript':189 'suggest':186 'timeout':155 'translat':124 'unclear':236 'uniform':134 'unit':111 'usdc':14,28,113,119 'usdc-settlement' 'use':120 'util':70,234 'varieti':56 'via':37,144 'wallet':215 'web3':67 'without':221 'x402':2,16,39,146 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"d20304ef-9034-4b70-baf2-a0c0b02885c4","listingId":"a93a403e-8a45-4925-9577-d318e85aaf9d","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/197","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:39.130Z"}],"sources":[{"listingId":"a93a403e-8a45-4925-9577-d318e85aaf9d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/197","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:39.130Z","lastSeenAt":"2026-04-22T13:31:38.317Z"}],"details":{"listingId":"a93a403e-8a45-4925-9577-d318e85aaf9d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/197 \\\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 endpoint returns a 402 challenge with x402Version 1, requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/197"},{"claim":"maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), which equals $0.02","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/197"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a premium API resource with per-request USDC micropayments on Base","Integrating x402-compatible agent workflows that auto-pay for API calls","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment-gated APIs","Agents that need keyless, pay-per-request API access on Base","Projects exploring crypto micropayment-based API monetization"],"notFor":["Users who need detailed API documentation or well-defined schemas before integrating","Applications requiring free or fiat-only payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.068Z"},"updatedAt":"2026-04-22T13:31:38.317Z"}}