{"id":"1f9bfa57-468e-4b7c-93e3-1722544d6be5","shortId":"cc4gqG","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/152` is listed as \"Premium API Access\" but its exact functionality is not documented beyond that label. It is likely one of the generation/utility endpoints offered on the platform.\n\nThe endpoint is live and responds with a standard x402 payment challenge. It accepts payment in USDC on the Base network via the \"exact\" payment scheme. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing across all endpoints. No API keys are required; access is granted by attaching an X-PAYMENT header with a valid x402 payment proof. The platform advertises no rate limits and instant access.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what this specific resource returns. The platform lists many endpoints across categories but provides no detail on input parameters or output formats for any of them.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-base","no-api-key","http-post"],"categories":["infrastructure","utility"],"synonyms":["premium API","pay-per-call API","x402 API","USDC micropayment API","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","The specific functionality of /api/v1/generate/resource/152 ('Premium API Access') is completely undocumented","No OpenAPI schema, no request parameters, and no response format are described anywhere","No robots.txt or agents.txt found on the origin"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/152","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/152","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 there is essentially no documentation: no OpenAPI schema, no request/response examples, no description of what resource/152 actually does. Docs pages are empty beyond a wallet-connect prompt. The listing is effectively a 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'/request':17,34,151 '0.02':16,33,141,150 '000':132 '20':131 '6':137 'Base network API' 'USDC micropayment API' 'accept':113 'access':77,161,185 'across':153,230 'addit':206 'advertis':179 'ai/ml':59 'amount':128 'analyt':58 'api':5,22,55,76,157,192 'attach':165 'base':8,25,119,133 'beyond':85 'call':12,29 'categori':231 'challeng':111 'collect':46 'connect':201 'consist':144 'content':207 'crypto-paid API' 'data':57,63 'decim':138 'descript':218 'detail':235 'doc':191 'document':84,186 'endpoint':6,23,36,95,101,155,229 'equal':140 'exact':80,123 'exampl':215 'extrem':188 'financ':61 'format':241 'function':81 'gate':3,20 'generation/utility':94 'grant':163 'header':170 'http-post' 'infer':60 'infrastructur':65 'input':237 'instant':184 'key':158 'label':87 'like':90 'limit':182 'list':73,227 'live':103 'lowpaymentfee' 'lowpaymentfee.com':41 'mani':228 'maximum':127 'network':120 'no-api-key' 'offer':44,96 'one':91 'openapi':211 'output':240 'page':196 'paramet':238 'part':38 'pay':10,27,52 'pay-per-cal':9,26 'pay-per-call API' 'pay-per-request':51 'payment':110,114,124,169,175 'per':11,28,53,142 'platform':42,99,147,178,226 'premium':4,21,75 'premium API' 'price':152,193 'prompt':203 'proof':176 'protocol':50 'provid':233 'rate':181 'readm':195 'render':198 'request':54,143 'request/response':214 'requir':129,160 'resourc':69,223 'respond':105 'return':224 'schema':212 'scheme':125 'span':56 'spars':189 'specif':68,222 'standard':108 'uniform':149 'unit':134 'usdc':14,31,116,136 'usdc-base' 'util':66 'valid':173 'via':121 'wallet':202 'web3':62 'x':168 'x-payment':167 'x402':2,19,49,109,174 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"6160e912-25d6-47e9-a38b-b9d1688ef3c0","listingId":"1f9bfa57-468e-4b7c-93e3-1722544d6be5","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/152","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:30.026Z"}],"sources":[{"listingId":"1f9bfa57-468e-4b7c-93e3-1722544d6be5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/152","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:30.026Z","lastSeenAt":"2026-04-28T16:33:01.474Z"}],"details":{"listingId":"1f9bfa57-468e-4b7c-93e3-1722544d6be5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/152 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -d '{}'","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/generate/resource/152"},{"claim":"Platform-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/152"}],"useCases":["Accessing a generation or utility endpoint without needing API key registration","Making one-off paid API calls settled in USDC on Base","Integrating pay-per-request infrastructure services into agent workflows"],"bestFor":["Developers who want keyless, pay-per-call API access","Agents with USDC on Base looking for low-cost utility endpoints","Prototyping workflows that need instant API access without signup"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume use cases where $0.02/request adds up and bulk pricing is preferred","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:44.76Z"},"updatedAt":"2026-04-28T16:33:01.474Z"}}