{"id":"3983fb1b-955b-4878-be9f-14c07be0f371","shortId":"uYhmC9","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/36` 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 pricing of $0.02/request across all listed APIs. Payment is settled on-chain to a specified wallet address using the x402 exact payment scheme.\n\nDocumentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what \"Premium API Access\" actually returns or what input it expects. The endpoint accepts POST requests and returns application/json, but beyond that the functionality is unclear. The x402 challenge is live and well-formed, confirming the endpoint is operational.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 API","USDC API access","pay-per-call API","Base network API","micropayment API","crypto-paid API"],"warnings":["No documentation available — all doc pages render only 'Connect wallet' with no content","No OpenAPI or schema describing request parameters or response format","The purpose and functionality of 'Premium API Access' is completely undocumented","The endpoint path '/api/v1/stripe/subscriptions/36' suggests a Stripe subscription resource but its actual behavior is unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/36","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/36","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint is operational and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what 'Premium API Access' actually does. The docs pages are all blank beyond a wallet-connect prompt. This is effectively a stub 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'/request':138 '0.02':126,137 '000':109 '20':108 '6':121 'Base network API' 'USDC API access' 'accept':210 'access':6,20,36,101,200 'across':139 'actual':201 'addit':183 'address':153 'ai':63 'analyt':62 'api':5,19,35,58,83,100,142,169,199 'application/json':215 'base':8,22,110,116 'base-network' 'beyond':217 'categori':59 'chain':148 'challeng':225 'commit':90 'confirm':232 'connect':178 'consist':129 'content':184 'crypto-paid API' 'data':61 'decim':122 'descript':195 'doc':168 'document':160 'endpoint':30,47,72,94,209,234 'exact':157 'exampl':192 'expect':207 'extrem':165 'financ':66 'form':231 'function':220 'gate':3,17 'host':54 'includ':60 'infrastructur':69 'input':205 'json-response' 'key':84 'label':98 'learn':65 'limit':87 'list':141 'live':227 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'mani':46 'micropayment API' 'network':117 'no-api-key' 'offer':48 'on-chain':146 'one':44 'openapi':188 'oper':236 'page':173 'paid':9,23 'pay':78 'pay-per-call API' 'pay-per-request':77 'payment':40,104,143,158 'per':11,25,79,127 'per-request':10,24 'platform':52,75,132 'post':211 'post-method' 'premium':4,18,34,99,198 'price':135,170 'prompt':180 'protocol':41 'provid':33 'rate':86 'readm':172 'render':175 'request':12,26,80,128,212 'request/response':191 'requir':91,103 'return':202,214 'schema':189 'scheme':159 'settl':145 'sinc':118 'site':163 'spars':166 'specif':93 'specifi':151 'translat':124 'unclear':222 'uniform':134 'unit':111 'usdc':14,28,113,119 'usdc-settlement' 'use':120,154 'util':70 'varieti':56 'via':37 'wallet':152,179 'web3':67 'well':230 'well-form':229 'x402':2,16,39,156,224 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"3e06f7cb-1faa-49c5-90b6-58d5d89d6dc1","listingId":"3983fb1b-955b-4878-be9f-14c07be0f371","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/36","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:45.806Z"}],"sources":[{"listingId":"3983fb1b-955b-4878-be9f-14c07be0f371","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/36","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:45.806Z","lastSeenAt":"2026-04-22T12:04:25.387Z"}],"details":{"listingId":"3983fb1b-955b-4878-be9f-14c07be0f371","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/36 \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/36"},{"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 contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/36"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","On-chain settled API calls on Base L2"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer on-chain micropayments over subscription billing"],"notFor":["Users who need detailed API documentation before integrating","Applications requiring free or high-volume bulk access at discounted rates","Users without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.801Z"},"updatedAt":"2026-04-22T12:04:25.387Z"}}