{"id":"9d09efaf-9856-4957-acff-87a475ac8a96","shortId":"yTCvLt","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 behind an x402 paywall. The provider operates a suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all gated via the x402 protocol on the Base network and settled in USDC.\n\nThe specific endpoint `/api/v1/generate/resource/24` is listed under the provider's umbrella but lacks dedicated documentation explaining what it returns. The x402 challenge confirms it is live, accepts POST requests, and charges up to 20,000 units of USDC (0.02 USDC given 6 decimals) per call. The provider advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nBecause the provider's docs pages, pricing page, and README all render only a \"Connect wallet\" prompt with no further content, there is no documentation describing request parameters, response format, or the actual data returned by this particular resource. The listing is therefore a stub: the endpoint is confirmed live via its 402 challenge, but its purpose and output remain unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","post-method","no-api-key"],"categories":["infrastructure","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC gated endpoint","Base network API","lowpaymentfee","premium API access","micropayment API"],"warnings":["No documentation available — docs, pricing, and README pages all render only 'Connect wallet' with no content.","The purpose and output of /api/v1/generate/resource/24 are unknown; 'Premium API Access' is a generic label used across all endpoints.","No request or response schema is documented or inferable.","The provider lists many endpoints but none appear individually documented."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/24","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/24","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 via a valid x402 402 challenge, but there is zero documentation on what this resource actually does, what request body it expects, or what it returns. Docs, pricing, and README pages all render only a wallet-connect prompt. This is effectively a stub 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'0.02':117 '000':113 '20':112 '402':202 '6':120 'Base network API' 'USDC gated endpoint' 'accept':105 'access':38,135 'actual':182 'advertis':126 'ai/ml':58 'analyt':57 'api':5,19,37,54,128 'attach':138 'base':8,22,73 'base-network' 'behind':40 'call':53,123 'caller':136 'challeng':100,203 'charg':109 'confirm':101,198 'connect':164 'content':170 'data':56,61,183 'decim':121 'dedic':92 'describ':175 'doc':154 'document':93,174 'endpoint':6,20,30,81,196 'explain':94 'finance/web3':60 'format':179 'gate':3,17,66 'generic':35 'given':119 'header':143 'infer':59 'infrastructur':63 'instant':134 'key':129 'lack':91 'limit':132 'list':84,190 'live':104,199 'lowpaymentfee' 'lowpaymentfee.com':32 'micropayment API' 'network':74 'no-api-key' 'oper':46 'output':208 'page':155,157 'paramet':177 'particular':187 'pay':10,24,51 'pay-per-cal':50 'pay-per-call API' 'pay-per-request':9,23 'payment':142,148 'paywal':43 'per':11,25,52,122 'post':106 'post-method' 'premium':4,18,36 'premium API access' 'price':156 'prompt':166 'proof':149 'protocol':70 'provid':33,45,87,125,152 'purpos':206 'rate':131 'readm':159 'remain':209 'render':161 'request':12,26,107,176 'resourc':39,188 'respons':178 'return':97,184 'settl':76 'simpli':137 'span':55 'specif':80 'stub':194 'suit':48 'therefor':192 'umbrella':89 'unclear':210 'unit':114 'usdc':14,28,78,116,118 'usdc-settlement' 'util':64 'valid':146 'via':67,200 'wallet':165 'x':141 'x-payment':140 'x402':2,16,42,69,99,147 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"d8b89e0a-1ff0-4e74-b4ca-b8a6dc528c44","listingId":"9d09efaf-9856-4957-acff-87a475ac8a96","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/24","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:07.521Z"}],"sources":[{"listingId":"9d09efaf-9856-4957-acff-87a475ac8a96","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/24","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:07.521Z","lastSeenAt":"2026-04-24T15:01:52.218Z"}],"details":{"listingId":"9d09efaf-9856-4957-acff-87a475ac8a96","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/24 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\"","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 x402Version 1, accepting USDC on Base network with maxAmountRequired of 20000 (0.02 USDC).","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/24"},{"claim":"The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and README pages render only a 'Connect wallet' prompt with no further content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a premium resource without API key registration","Agent-driven pay-per-call workflows settled in USDC on Base","Demonstrating x402 payment protocol integration"],"bestFor":["Developers experimenting with x402 payment flows","Agents that need keyless, pay-as-you-go API access on Base","Projects requiring USDC-settled micropayments per request"],"notFor":["Users who need well-documented, predictable API responses","Production workloads requiring SLA guarantees or detailed schemas","Anyone needing free or fiat-only payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:00.591Z"},"updatedAt":"2026-04-24T15:01:52.218Z"}}