{"id":"fdae86c9-d665-4004-9334-67f7f2247030","shortId":"TLr5Q8","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\" 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/166` is labeled \"Premium API Access\" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). It accepts POST requests and returns application/json. Payment is made via the x402 exact scheme, settling USDC on Base to the specified payTo address. The x402 challenge is live and well-formed with a 300-second timeout.\n\nDocumentation on the site is extremely sparse — the docs, pricing, API, 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 \"Premium API Access\" actually returns or what input it expects. The endpoint name suggests it may relate to Stripe subscription management, but this is speculative. Prospective users should be aware that the actual functionality behind this endpoint is undocumented.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["api","payments"],"synonyms":["lowpaymentfee","x402 api","pay-per-call api","USDC api access","Base network api","micropayment api","premium api"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The endpoint name 'stripe/subscriptions/166' suggests Stripe subscription functionality but this is unconfirmed","Actual behavior and return data of this endpoint are unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/166","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/166","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint exists and accepts payment. However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality of 'Premium API Access' is completely undescribed. This is effectively a stub 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'0.02':109,123 '000':115 '20':114 '300':159 '6':121 'Base network api' 'USDC api access' 'accept':125 'access':6,20,36,104,202 'actual':203,232 'address':147 'ai':63 'analyt':62 'api':5,19,35,58,83,103,172,201 'application/json':130 'awar':229 'base':8,22,92,116,142 'base-network' 'behind':234 'call':12,26 'categori':59 'challeng':150 'connect':180 'content':186 'cost':106 'data':61 'decim':122 'descript':197 'doc':170 'document':162 'endpoint':30,47,72,98,211,236 'exact':137 'exampl':194 'expect':209 'extrem':167 'financ':66 'form':156 'function':233 'gate':3,17 'host':54 'includ':60 'infrastructur':69 'input':207 'json-response' 'key':84 'label':101 'learn':65 'limit':87 'live':152 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'made':133 'manag':220 'mani':46 'maxamountrequir':112 'may':215 'micropayment api' 'name':212 'network':93 'no-api-key' 'offer':48 'one':44 'openapi':190 'page':175 'paid':9,23 'pay':78 'pay-per-call api' 'pay-per-request':77 'payment':40,131 'payto':146 'per':11,25,79,110 'per-cal':10,24 'platform':52,75 'post':126 'post-method' 'premium':4,18,34,102,200 'premium api' 'price':171 'prompt':182 'prospect':225 'protocol':41 'provid':33 'rate':86 'readm':174 'relat':216 'render':177 'request':80,111,127 'request/response':193 'return':129,204 'schema':191 'scheme':138 'second':160 'settl':139 'settlement':89 'site':165 'spars':168 'specif':97 'specifi':145 'specul':224 'stripe':218 'subscript':219 'substant':185 'suggest':213 'timeout':161 'undocu':238 'unit':117 'usdc':14,28,95,119,140 'usdc-settlement' 'use':94 'user':226 'util':70 'varieti':56 'via':37,134 'wallet':181 'web3':67 'well':155 'well-form':154 'x402':2,16,39,136,149 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"8bde4940-27fa-4c40-9094-011194e9c492","listingId":"fdae86c9-d665-4004-9334-67f7f2247030","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/166","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:56:33.689Z"}],"sources":[{"listingId":"fdae86c9-d665-4004-9334-67f7f2247030","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/166","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:56:33.689Z","lastSeenAt":"2026-04-22T05:31:33.367Z"}],"details":{"listingId":"fdae86c9-d665-4004-9334-67f7f2247030","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/166 \\\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","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/166"},{"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":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/stripe/subscriptions/166"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a premium API endpoint with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Exploring x402 payment protocol integrations on Base"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-per-call API access","Users who want to avoid subscription commitments"],"notFor":["Users who need detailed API documentation before integrating","High-volume use cases where per-request crypto payments add friction","Anyone needing clarity on what the endpoint actually returns"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:49.374Z"},"updatedAt":"2026-04-22T05:31:33.367Z"}}