{"id":"26bd9978-5f3a-48cc-b02a-d089292626b3","shortId":"yYzxzq","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 at lowpaymentfee.com is one of many x402-protocol-gated API resources offered by the provider. The specific resource `/api/v1/generate/resource/9` is labeled \"Premium API Access\" and accepts POST requests, settling payments in USDC on the Base network. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02 per request. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader lowpaymentfee.com platform hosts endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request.\n\nHowever, the specific functionality behind `/api/v1/generate/resource/9` is not documented. The endpoint path suggests a generation or resource-creation service, but no schema, example payloads, or response formats are available from the crawled material. The docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further content. Callers should treat this as an exploratory endpoint until more documentation surfaces.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["infrastructure","utility"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC API","Base network API","micropayment API","lowpaymentfee"],"warnings":["No documentation available — docs, pricing, and API pages all render only a 'Connect wallet' prompt with no content","The specific functionality of /api/v1/generate/resource/9 is unknown; 'Premium API Access' is a generic label","No request or response schema is provided; callers cannot know what to send or expect back","The provider hosts many endpoints but none appear individually documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/9","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/9","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what the endpoint actually does, no request/response schema, and no examples. The docs pages returned only wallet-connect prompts. This is effectively a stub 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'/request':17,34 '0.02':16,33,91,162 '000':82 '20':81 '6':87 'Base network API' 'USDC API' 'accept':63 'access':61 'across':122 'advertis':77 'ai':132 'analysi':136 'analyt':126 'api':5,22,47,60,95,203 'attach':104 'avail':194 'base':8,25,72,83 'base-network' 'behind':169 'broader':117 'call':12,29 'caller':102,216 'categori':124 'challeng':76 'classif':139 'connect':209 'content':215 'convers':155 'crawl':197 'creation':183 'data':125,129 'decim':88 'doc':200 'document':173,226 'embed':140 'endpoint':6,23,36,121,158,175,223 'equal':90 'estim':150 'exampl':188 'exchang':145 'exploratori':222 'export':130 'feed':144 'financ':141 'format':192 'four':123 'function':168 'gas':149 'gate':3,20,46 'generat':156,179 'geocod':153 'header':109 'host':120 'howev':165 'infrastructur':152 'insight':131 'key':96 'label':58 'learn':134 'limit':99 'list':160 'lowpaymentfee' 'lowpaymentfee.com':38,118 'machin':133 'mani':42 'materi':198 'maxamountrequir':79 'metric':127 'micropayment API' 'network':73 'no-api-key' 'offer':49 'one':40 'page':204 'path':176 'pay':10,27 'pay-per-cal':9,26 'pay-per-call API' 'pay-per-request' 'payload':189 'payment':67,108,114 'per':11,28,92,163 'platform':119 'post':64 'post-endpoint' 'premium':4,21,59 'premium API' 'price':143,201 'prompt':211 'proof':115 'protocol':45 'provid':52 'quot':148 'rate':98,146 'report':128 'request':65,93,164 'requir':101 'resourc':48,55,182 'resource-cr':181 'respons':191 'return':206 'schema':187 'sentiment':135 'servic':184 'settl':66 'simpli':103 'specif':54,167 'suggest':177 'summar':138 'surfac':227 'text':137 'token':147 'treat':218 'unit':84 'usdc':14,31,69,86 'usdc-settlement' 'valid':112,154 'wallet':210 'web3':142 'x':107 'x-payment':106 'x402':2,19,44,75,113 'x402 endpoint' 'x402-gated':1,18 'x402-payment' 'x402-protocol-gated':43","prices":[{"id":"b371d2a4-5e84-4620-850b-3c118eb2f312","listingId":"26bd9978-5f3a-48cc-b02a-d089292626b3","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/9","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:21.543Z"}],"sources":[{"listingId":"26bd9978-5f3a-48cc-b02a-d089292626b3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/9","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:21.543Z","lastSeenAt":"2026-04-28T21:33:33.603Z"}],"details":{"listingId":"26bd9978-5f3a-48cc-b02a-d089292626b3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/9 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -d '{}'","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/generate/resource/9","body":{},"method":"POST","headers":{"X-PAYMENT":"<x402-payment-proof>","Content-Type":"application/json"}},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x8335…) on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/9"},{"claim":"All endpoints are listed at $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"}],"useCases":["Programmatic access to a generation/resource endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment flows","Agents that need instant, keyless API access settled in USDC on Base","Low-volume, pay-per-use consumption without subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-throughput production workloads requiring well-documented schemas and error handling","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:48.104Z"},"updatedAt":"2026-04-28T21:33:33.603Z"}}