{"id":"3457c535-9eae-4217-9a4e-a04a1b01908e","shortId":"pjmfFC","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\" behind an x402 payment wall. It is part of a broader platform that offers multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all payable per-request via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/89` is listed as \"Premium API Access\" and requires a POST request with an x402 payment header. The challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). The platform advertises no API keys, no rate limits, and instant access — payment is the only authentication mechanism.\n\nDocumentation on the site is extremely thin. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the \"Premium API Access\" endpoint actually returns or what input it expects beyond a POST method. The endpoint is confirmed live (returns a valid 402 challenge), but the lack of documentation makes it difficult to determine the actual functionality behind this particular subscription-style path.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-billing","post-method","no-api-key"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","crypto-paid API","402 payment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","The endpoint path '/api/v1/stripe/subscriptions/89' suggests a subscription model but no details on what is subscribed to or what data is returned.","No OpenAPI schema or response examples are available; actual functionality is unknown.","No robots.txt or agents.txt present on the origin."],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/89","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/89","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, but there is virtually no documentation: no OpenAPI spec, no request/response examples, no description of what the endpoint actually does beyond the label 'Premium API Access'. The docs pages are empty. This is effectively a stub 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'0.02':119 '000':108 '0x8335':113 '20':107 '2913':114 '402':206 '402 payment API' '6':124 'Base network API' 'USDC API access' 'access':6,20,36,89,137,185 'actual':187,219 'advertis':102,128 'ai':57 'analyt':56 'api':5,19,35,52,88,130,153,184 'authent':142 'base':8,22,76,109,116 'behind':37,221 'beyond':194 'broader':47 'call':12,26,121 'categori':53 'challeng':101,207 'confirm':201 'connect':162 'content':168 'cost':105 'crypto-paid API' 'data':55 'decim':125 'descript':179 'determin':217 'difficult':215 'doc':152 'document':144,212 'endpoint':30,82,186,199 'equal':118 'exampl':176 'expect':193 'extrem':149 'financ':60 'function':220 'gate':3,17 'header':99 'includ':54 'infrastructur':63 'input':191 'instant':136 'key':131 'lack':210 'learn':59 'limit':134 'list':85 'live':202 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':58 'make':213 'maximum':104 'mechan':143 'method':197 'multipl':51 'network':77 'no-api-key' 'offer':50 'openapi':172 'page':157 'paid':9,23 'part':44 'particular':223 'path':227 'pay-per-call API' 'payabl':66 'payment':40,98,138 'per':11,25,68,120 'per-cal':10,24 'per-request':67 'per-request-billing' 'platform':48,127 'post':93,196 'post-method' 'premium':4,18,34,87,183 'price':154 'prompt':164 'protocol':73 'provid':33 'rate':133 'readm':156 'render':159 'request':69,94 'request/response':175 'requir':91 'return':188,203 'schema':173 'site':147 'specif':81 'style':226 'subscript':225 'subscription-styl':224 'substant':167 'thin':150 'unit':110 'usdc':14,28,79,112,122 'usdc-base' 'use':78,123 'util':64 'valid':205 'via':70 'wall':41 'wallet':163 'web3':61 'x402':2,16,39,72,97 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"781ab48d-68ac-4db0-978e-1bc1698b4321","listingId":"3457c535-9eae-4217-9a4e-a04a1b01908e","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/89","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:59.057Z"}],"sources":[{"listingId":"3457c535-9eae-4217-9a4e-a04a1b01908e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/89","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:59.057Z","lastSeenAt":"2026-04-22T08:31:38.198Z"}],"details":{"listingId":"3457c535-9eae-4217-9a4e-a04a1b01908e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/89 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","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/89"},{"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 on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/89"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic access to subscription-gated resources via x402 protocol"],"bestFor":["Developers wanting key-less, pay-per-use API access","AI agents that can settle x402 payments autonomously","Users already holding USDC on Base who want frictionless API calls"],"notFor":["Users needing detailed API documentation or response schemas before purchasing","Anyone without USDC on the Base network","Production use cases requiring SLA guarantees or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:48.151Z"},"updatedAt":"2026-04-22T08:31:38.198Z"}}