{"id":"1b5b488c-6fc5-4640-ac98-1262fbaa197d","shortId":"vnPHLr","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 offering multiple API categories — data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated via the x402 protocol on the Base network and settled in USDC.\n\nThe specific endpoint `/api/v1/stripe/subscriptions/144` is listed as \"Premium API Access\" and costs up to $0.02 per request (the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC, which at 6 decimals equals $0.02). Payment is made via an `X-PAYMENT` header using the x402 \"exact\" scheme. The endpoint accepts POST requests and returns `application/json`. No API keys or rate limits are advertised; access is purely pay-per-call.\n\nDocumentation on the site is extremely thin — 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 description of what this specific endpoint actually returns or what input it expects. The name \"Premium API Access\" and the path segment \"stripe/subscriptions\" suggest it may relate to Stripe subscription management, but this is speculative. Prospective users should test the endpoint directly to understand its behavior.","tags":[],"capabilities":["x402-payment-gated","usdc-settlement","base-network","per-call-pricing","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","lowpaymentfee","premium API","stripe subscriptions API"],"warnings":["No OpenAPI schema or endpoint documentation available","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content","The endpoint's actual functionality is unknown — 'Premium API Access' and the path '/stripe/subscriptions/144' are not explained anywhere","No request body schema or response examples are available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/144","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/144","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 with clear pricing, but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the endpoint actually does beyond the opaque name \"Premium API Access\". The docs pages are empty. This is effectively a stub 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'0.02':91,112 '000':102 '20':101 '6':109 'Base network API' 'USDC API access' 'accept':129 'access':6,20,36,86,143,202 'actual':191 'advertis':97,142 'ai':55 'analyt':54 'api':5,19,35,51,85,136,159,201 'application/json':134 'base':8,22,71,103 'base-network' 'behavior':230 'behind':37 'broader':47 'call':12,26,149 'categori':52 'challeng':96 'connect':168 'content':174 'cost':88 'data':53 'decim':110 'descript':185 'direct':226 'doc':158 'document':150 'endpoint':30,79,128,190,225 'equal':111 'exact':125 'exampl':182 'expect':197 'extrem':155 'financ':58 'gate':3,17,64 'header':121 'infrastructur':61 'input':195 'json-response' 'key':137 'learn':57 'limit':140 'list':82 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':56 'made':115 'manag':215 'maxamountrequir':99 'may':210 'multipl':50 'name':199 'network':72 'offer':49 'openapi':178 'page':163 'paid':9,23 'part':44 'path':205 'pay':147 'pay-per-cal':146 'pay-per-call API' 'payment':40,113,120 'per':11,25,92,148 'per-cal':10,24 'per-call-pricing' 'platform':48 'post':130 'post-method' 'premium':4,18,34,84,200 'premium API' 'price':160 'prompt':170 'prospect':220 'protocol':68 'provid':33 'pure':145 'rate':139 'readm':162 'relat':211 'render':165 'request':93,131 'request/response':181 'return':133,192 'schema':179 'scheme':126 'segment':206 'settl':74 'site':153 'specif':78,189 'specul':219 'stripe':213 'stripe subscriptions API' 'stripe/subscriptions':207 'subscript':214 'suggest':208 'test':223 'thin':156 'understand':228 'unit':104 'usdc':14,28,76,106 'usdc-settlement' 'use':122 'user':221 'util':62 'via':65,116 'wall':41 'wallet':169 'web3':59 'x':119 'x-payment':118 'x402':2,16,39,67,95,124 'x402 API' 'x402-gated':1,15 'x402-payment-gated'","prices":[{"id":"29705ff4-64b8-4be4-b2ea-fb9157db9a24","listingId":"1b5b488c-6fc5-4640-ac98-1262fbaa197d","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/144","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:24.673Z"}],"sources":[{"listingId":"1b5b488c-6fc5-4640-ac98-1262fbaa197d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/144","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:24.673Z","lastSeenAt":"2026-04-22T18:32:18.194Z"}],"details":{"listingId":"1b5b488c-6fc5-4640-ac98-1262fbaa197d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/144 \\\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 x402 challenge advertises maxAmountRequired of 20000 base units of USDC (asset 0x8335…) on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/144"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The site offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a premium API service with no signup or API key required","Agent-driven workflows that need on-demand paid API calls settled in USDC on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers or agents wanting zero-signup, pay-per-call API access","x402 protocol experimentation on Base mainnet","Micro-payment use cases where $0.02/request is acceptable"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before purchasing","Use cases requiring non-crypto payment methods","High-volume consumers who need bulk pricing or subscription discounts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.798Z"},"updatedAt":"2026-04-22T18:32:18.194Z"}}