{"id":"3d2381ac-c084-4734-86c4-117d07f14eff","shortId":"FKKxg7","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\" behind an x402 paywall. 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 use the x402 protocol for payment, settling in USDC on the Base network.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/85` is labeled \"Premium API Access\" in the x402 challenge. The maximum amount required per call is 20,000 base units of USDC (which uses 6 decimals), equating to $0.02 per request. The platform advertises a flat $0.02/request pricing model across all its endpoints with no API keys, no rate limits, no minimums, and instant access.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what \"Premium API Access\" actually returns. The endpoint accepts POST requests and returns application/json. Without additional documentation, the exact functionality behind this particular subscription endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","x402 api","pay-per-request api","USDC api access","Base network api","micropayment api","crypto-paid api"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided","The exact functionality of '/api/v1/stripe/subscriptions/85' is unclear — 'Premium API Access' is not descriptive","The endpoint path references 'stripe/subscriptions' which is unusual for an x402-settled endpoint; actual behavior is unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/85","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/85","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 zero documentation on what the endpoint actually does, no request/response schema, and no examples. The 'Premium API Access' label is vague. Docs pages are empty beyond a wallet connect 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'/request':129 '0.02':120,128 '000':109 '20':108 '6':116 'Base network api' 'USDC api access' 'accept':191 'access':6,20,36,96,147,186 'across':132 'actual':187 'addit':198 'advertis':125 'ai':62 'amount':103 'analyt':61 'api':5,19,35,57,95,138,154,185 'application/json':196 'base':8,22,86,110 'base-network' 'behind':37,203 'call':106 'categori':58 'challeng':100 'connect':163 'content':169 'crypto-paid api' 'data':60 'decim':117 'descript':181 'detail':180 'doc':153 'document':148,199 'endpoint':30,46,71,90,135,190,207 'equat':118 'exact':201 'exampl':177 'extrem':150 'financ':65 'flat':127 'function':202 'gate':3,17 'host':53 'includ':59 'infrastructur':68 'instant':146 'json-response' 'key':139 'label':93 'learn':64 'limit':142 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':63 'mani':45 'maximum':102 'micropayment api' 'minimum':144 'model':131 'network':87 'offer':47 'one':43 'openapi':173 'page':158 'paid':9,23 'particular':205 'pay-per-request api' 'payment':80 'paywal':40 'per':11,25,105,121 'per-request':10,24 'per-request-pricing' 'platform':51,74,124 'post':192 'post-method' 'premium':4,18,34,94,184 'price':130,155 'prompt':165 'protocol':78 'provid':33 'rate':141 'readm':157 'remain':208 'render':160 'request':12,26,122,193 'request/response':176 'requir':104 'return':188,195 'schema':174 'settl':81 'spars':151 'specif':89 'subscript':206 'unclear':209 'unit':111 'usdc':14,28,83,113 'usdc-settlement' 'use':75,115 'util':69 'varieti':55 'wallet':164 'web3':66 'without':197 'x402':2,16,39,77,99 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"be511c4a-a80f-4cff-ab19-1ff5cb223e38","listingId":"3d2381ac-c084-4734-86c4-117d07f14eff","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/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:08.109Z"}],"sources":[{"listingId":"3d2381ac-c084-4734-86c4-117d07f14eff","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/85","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:08.109Z","lastSeenAt":"2026-04-22T07:31:42.810Z"}],"details":{"listingId":"3d2381ac-c084-4734-86c4-117d07f14eff","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/85 \\\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 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/85"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/85"},{"claim":"Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments","Agent-driven API consumption without API keys or subscriptions","Programmatic access to paid endpoints using x402 protocol"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over traditional subscriptions"],"notFor":["Users needing detailed API documentation before purchasing","Anyone without USDC on the Base network","High-volume consumers who need bulk pricing or SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:47.703Z"},"updatedAt":"2026-04-22T07:31:42.810Z"}}