{"id":"bb813073-1d7e-4380-9cd3-8bed6466715e","shortId":"8ukxsw","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.","tagline":"x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.","description":"This endpoint is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities. The specific resource at `/api/v1/generate/resource/178` is listed as \"Premium API Access\" but its exact functionality is not documented beyond that label.\n\nPayment is handled via the x402 protocol on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required per call is 20,000 base units of USDC, which at 6 decimals equals $0.02 USD — consistent with the site's advertised flat pricing of $0.02 per request. The endpoint accepts POST requests and returns `application/json`. No API keys or rate limits are advertised; access is gated purely by the x402 payment header.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no description of what data or functionality this specific resource provides. The endpoint is confirmed live (returns a proper 402 challenge), but without knowing what it actually does, agents should treat this as a low-information listing.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","json-response","no-api-key","post-method"],"categories":["api","infrastructure"],"synonyms":["premium API","x402 API","pay-per-call API","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided","The exact functionality of resource/178 is unknown — 'Premium API Access' is the only description","Cannot verify what data or service is returned after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/178","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/178","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no description of what this specific resource actually does. The docs pages are all empty 'Connect wallet' stubs. This is effectively a stub 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'/request':17,34 '0.02':16,33,121,132 '000':111 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':102 '20':110 '402':210 '6':118 'Base network API' 'USDC API' 'accept':137 'access':77,151 'actual':217 'advertis':128,150 'agent':219 'ai/ml':59 'amount':105 'analyt':58 'api':5,22,55,76,144,167 'application/json':142 'base':8,25,97,112 'base-network' 'beyond':85 'call':12,29,108 'challeng':211 'collect':46 'confirm':205 'connect':175 'consist':123 'content':181 'contract':101 'data':57,63,195 'decim':119 'descript':192 'doc':165 'document':84,160 'endpoint':6,23,36,136,203 'equal':120 'exact':80 'extrem':162 'financ':61 'flat':129 'function':81,197 'gate':3,20,153 'handl':90 'header':159 'infer':60 'inform':227 'infrastructur':65 'json-response' 'key':145 'know':214 'label':87 'limit':148 'list':73,228 'live':206 'low':226 'low-inform':225 'lowpaymentfee' 'lowpaymentfee.com':41 'maximum':104 'micropayment API' 'network':98 'no-api-key' 'offer':44 'openapi':185 'page':170 'part':38 'pay':10,27,52 'pay-per-cal':9,26 'pay-per-call API' 'pay-per-request':51 'payment':88,158 'per':11,28,53,107,133 'platform':42 'post':138 'post-method' 'premium':4,21,75 'premium API' 'price':130,166 'prompt':177 'proper':209 'protocol':50,94 'provid':201 'pure':154 'rate':147 'readm':169 'render':172 'request':54,134,139 'request/response':188 'requir':106 'resourc':69,200 'return':141,207 'schema':189 'site':126 'span':56 'spars':163 'spec':186 'specif':68,199 'treat':221 'unit':113 'usd':122 'usdc':14,31,100,115 'usdc-settlement' 'use':99 'util':66 'via':91 'wallet':176 'web3':62 'without':213 'x402':2,19,49,93,157 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"3bc1c7cc-6fb4-4b2f-b6e9-f6c46288fada","listingId":"bb813073-1d7e-4380-9cd3-8bed6466715e","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/178","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:27.362Z"}],"sources":[{"listingId":"bb813073-1d7e-4380-9cd3-8bed6466715e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/178","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:27.362Z","lastSeenAt":"2026-04-22T20:00:43.851Z"}],"details":{"listingId":"bb813073-1d7e-4380-9cd3-8bed6466715e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/178 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/178"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/178"},{"claim":"Platform advertises $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to an undocumented premium resource via x402 micropayment","Demonstrating x402 protocol integration for pay-per-request workflows","Agent-driven API consumption without API key management"],"bestFor":["Developers experimenting with x402 protocol payments on Base","Agents that need key-free, pay-as-you-go API access","Testing micropayment-gated endpoint integration"],"notFor":["Production use cases requiring documented request/response schemas","Users who need to understand exactly what data an endpoint returns before paying","High-volume use cases where per-request pricing may not be cost-effective"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:41.842Z"},"updatedAt":"2026-04-22T20:00:43.851Z"}}