{"id":"415f5dd1-2aef-479a-aa07-bc8c7b53b7bb","shortId":"hQjP5a","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","description":"This endpoint at lowpaymentfee.com provides a generic \"Premium API Access\" resource gated behind the x402 payment protocol. The endpoint is live and returns a 402 challenge requiring payment of up to 20,000 units of USDC (contract 0x8335…2913) on the Base network. The specific resource path is `/api/v1/generate/resource/175`, which falls under the site's broader \"Infrastructure / Generation\" category.\n\nThe hosting site lowpaymentfee.com advertises a suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and instant access via Base network USDC payments. However, the specific resource at path `/resource/175` is listed as \"Premium API Access\" with a maxAmountRequired of 20,000 USDC units (which, given USDC's 6 decimals, equals $0.02), consistent with the site's uniform pricing.\n\nDocumentation 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 this particular resource generates or what input it expects beyond an HTTP POST. The output schema in the x402 challenge only confirms the method is POST and the endpoint is discoverable. Without further documentation, the actual functionality behind this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","http-post","json-response","generation"],"categories":["infrastructure","utility"],"synonyms":["lowpaymentfee","x402 api","pay-per-call api","usdc gated api","base network api","micropayment api","generation endpoint"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The actual functionality of /api/v1/generate/resource/175 is completely undocumented","The site lists many API categories but provides no evidence any return meaningful data"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/175","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/generate/resource/175","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response examples, and no description of what the endpoint actually does beyond the generic label 'Premium API Access'. Functionality must be entirely 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'/api/v1/generate/resource/175':77 '/docs':170 '/pricing':171 '/readme':174 '/resource/175':135 '0.02':111,157 '000':61,147 '0x8335':66 '20':60,146 '2913':67 '402':53 '6':154 'access':38,123,141 'actual':235 'advertis':92 'ai':100 'analyt':99 'api':5,19,37,96,116,140 'base':8,22,70,125 'base network api' 'behind':41,237 'beyond':209 'broader':84 'categori':87 'challeng':54,219 'confirm':221 'connect':180 'consist':158 'content':186 'contract':65 'data':98 'decim':155 'descript':197 'discover':230 'document':165,233 'endpoint':6,20,30,47,228,239 'equal':156 'exampl':194 'expect':208 'extrem':167 'fall':79 'financ':103 'function':236 'gate':3,17,40 'generat':86,203 'generation' 'generation endpoint' 'generic':35 'given':151 'host':89 'howev':129 'http':211 'http-post' 'infrastructur':85,106 'input':206 'instant':122 'json-response' 'key':117 'learn':102 'limit':120 'list':137 'live':49 'lowpaymentfee' 'lowpaymentfee.com':32,91 'machin':101 'maxamountrequir':144 'method':223 'micropayment api' 'network':71,126 'openapi':190 'output':214 'page':175 'particular':201 'path':75,134 'pay':10,24 'pay-per-call api' 'pay-per-request':9,23 'payment':44,56,128 'per':11,25,112 'post':212,225 'premium':4,18,36,139 'price':109,164 'prompt':182 'protocol':45 'provid':33 'rate':119 'remain':240 'render':177 'request':12,26,113 'request/response':193 'requir':55 'resourc':39,74,132,202 'return':51 'schema':191,215 'site':82,90,161 'span':97 'spars':168 'specif':73,131 'substant':185 'suit':94 'unclear':241 'uniform':163 'unit':62,149 'usdc':14,28,64,127,148,152 'usdc gated api' 'usdc-base' 'util':107 'via':124 'wallet':181 'web3':104 'without':231 'x402':2,16,43,218 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"f64c038b-0401-4763-88c6-3d3113282cec","listingId":"415f5dd1-2aef-479a-aa07-bc8c7b53b7bb","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/generate/resource/175","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:04.541Z"}],"sources":[{"listingId":"415f5dd1-2aef-479a-aa07-bc8c7b53b7bb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/175","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:04.541Z","lastSeenAt":"2026-04-29T01:04:47.428Z"}],"details":{"listingId":"415f5dd1-2aef-479a-aa07-bc8c7b53b7bb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/175 \\\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 challenge with maxAmountRequired of 20000 USDC units on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/175"},{"claim":"The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a generation resource via x402 micropayment","Agent-driven API consumption without API keys using on-chain USDC payments","Integrating pay-per-request infrastructure services into automated workflows"],"bestFor":["Developers wanting keyless, pay-per-call API access on Base","AI agents with x402-compatible wallets needing on-demand generation","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation before integrating","Applications requiring guaranteed SLAs or support contracts","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:00.692Z"},"updatedAt":"2026-04-29T01:04:47.428Z"}}