{"id":"e383456c-3dd9-446e-bd16-cd4fe7cef426","shortId":"KrkJxj","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 settlement on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/128` is labeled \"Premium API Access\" and returns a valid x402 challenge with a maximum cost of 20,000 base units of USDC (0.02 USD per request, since USDC uses 6 decimals). Payment is made via the x402 \"exact\" scheme to a specified wallet address on Base. The endpoint accepts POST requests and returns `application/json` responses.\n\nWhile the platform lists many endpoints across different domains (sentiment analysis, text summarization, geocoding, price feeds, etc.), the specific functionality behind this particular \"Premium API Access\" subscription endpoint is not documented in detail. The crawled docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no additional technical documentation. Without further documentation, the exact request/response schema for this endpoint remains unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-billing","no-api-key","json-response","post-method"],"categories":["api-gateway","infrastructure"],"synonyms":["lowpaymentfee","x402 api","pay-per-request api","USDC api access","Base network api","micropayment api","crypto-paid api"],"warnings":["No technical documentation available; all doc pages return only 'Connect wallet' with no content.","The exact functionality behind 'Premium API Access' at this subscription endpoint path is undocumented.","Request and response schemas are unknown—no OpenAPI spec or examples provided.","The endpoint path includes 'stripe/subscriptions' but payment is via x402/USDC on Base, which is potentially confusing."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/128","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/128","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, but there is essentially no documentation available—docs, pricing, API, and README pages all render only a wallet-connect prompt. The specific functionality, request schema, and response schema for this endpoint are unknown. The listing is effectively a 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'0.02':122 '000':117 '20':116 '6':129 'Base network api' 'USDC api access' 'accept':148 'access':6,20,36,104,180 'across':161 'addit':205 'address':143 'ai':63 'analysi':165 'analyt':62 'api':5,19,35,58,83,103,179,192 'application/json':153 'base':8,22,92,118,145 'base-network' 'behind':175 'categori':59 'challeng':110 'connect':200 'cost':114 'crawl':189 'crypto-paid api' 'data':61 'decim':130 'detail':187 'differ':162 'doc':190 'document':185,207,210 'domain':163 'endpoint':30,47,72,98,147,160,182,217 'etc':171 'exact':137,212 'feed':170 'financ':66 'function':174 'gate':3,17 'geocod':168 'host':54 'includ':60 'infrastructur':69 'json-response' 'key':84 'label':101 'learn':65 'limit':87 'list':158 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'made':133 'mani':46,159 'maximum':113 'micropayment api' 'network':93 'no-api-key' 'offer':48 'one':44 'page':195 'paid':9,23 'particular':177 'pay':78 'pay-per-request':77 'pay-per-request api' 'payment':40,131 'per':11,25,79,124 'per-request':10,24 'per-request-billing' 'platform':52,75,157 'post':149 'post-method' 'premium':4,18,34,102,178 'price':169,191 'prompt':202 'protocol':41 'provid':33 'rate':86 'readm':194 'remain':218 'request':12,26,80,125,150 'request/response':213 'respons':154 'return':106,152,197 'schema':214 'scheme':138 'sentiment':164 'settlement':89 'sinc':126 'specif':97,173 'specifi':141 'subscript':181 'summar':167 'technic':206 'text':166 'unit':119 'unknown':219 'usd':123 'usdc':14,28,95,121,127 'usdc-settlement' 'use':94,128 'util':70 'valid':108 'varieti':56 'via':37,134 'wallet':142,201 'web3':67 'without':208 'x402':2,16,39,109,136 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"f6973da3-ad27-4d48-8717-b553ab392569","listingId":"e383456c-3dd9-446e-bd16-cd4fe7cef426","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/128","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:28.861Z"}],"sources":[{"listingId":"e383456c-3dd9-446e-bd16-cd4fe7cef426","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/128","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:28.861Z","lastSeenAt":"2026-04-22T23:02:01.630Z"}],"details":{"listingId":"e383456c-3dd9-446e-bd16-cd4fe7cef426","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/128 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/128"},{"claim":"The platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API services with per-call USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic access to subscription-tier features via x402 payment protocol"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments on Base in USDC","Users who prefer crypto micropayments over traditional subscription billing"],"notFor":["Users who need detailed API documentation before integrating","Applications requiring fiat-only payment methods","High-volume use cases where per-request pricing may not be cost-effective compared to bulk plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.604Z"},"updatedAt":"2026-04-22T23:02:01.630Z"}}