{"id":"be813377-1c24-4e34-8b42-12944b2ec9c0","shortId":"FY7WXS","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific resource path `/api/v1/generate/resource/135` appears to be part of a broader platform offering dozens of API endpoints across categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x8335...2913` on Base). The max amount required is 20,000 base units, which at 6 decimals for USDC equals $0.02 per call. Payment is made via the `exact` scheme with a 300-second timeout. The response MIME type is `application/json`.\n\nWhile the platform lists many endpoint categories (sentiment analysis, text summarization, geocoding, price feeds, etc.), the specific functionality behind `/api/v1/generate/resource/135` is not documented. The crawled docs, pricing, API, and README pages all returned only a \"Connect wallet\" prompt with no additional technical documentation, schemas, or example payloads. Without knowing what this particular resource generates, callers should treat this as an opaque premium endpoint until further documentation is available.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","post-method"],"categories":["utility","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","pay-per-call API","USDC API access","Base network API","micropayment API"],"warnings":["The specific functionality of /api/v1/generate/resource/135 is undocumented — the resource name and behavior are opaque.","All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no usable content.","No OpenAPI spec, request schema, or response schema is available.","The platform lists many endpoint categories but none map clearly to this specific resource path."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/135","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/135","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation for what this specific resource does, no request/response schema, and all doc pages returned only a wallet-connect prompt. The endpoint's actual functionality is 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'/request':13,28 '0.02':12,27,83,139 '000':129 '0x8335':119 '20':128 '2913':120 '300':151 '6':134 'Base network API' 'USDC API access' 'accept':110 'access':7,22,38 'across':62 'addit':200 'ai':67 'amount':125 'analysi':168 'analyt':66 'api':6,21,37,60,95,187 'appear':49 'application/json':159 'avail':227 'base':9,24,91,122,130 'behind':178 'broader':55 'call':4,19,141 'caller':214 'categori':63,166 'challeng':104 'commit':100 'confirm':105 'connect':195 'contract':118 'crawl':184 'data':65 'decim':135 'doc':185 'document':182,202,225 'dozen':58 'endpoint':32,61,76,107,165,222 'equal':138 'etc':174 'exact':147 'exampl':205 'feed':173 'financ':70 'function':177 'generat':213 'geocod':171 'includ':64 'infrastructur':73 'json-response' 'key':96 'know':208 'learn':69 'limit':98 'list':163 'live':109 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'made':144 'mani':164 'max':124 'micropayment API' 'mime':156 'network':92 'no-api-key' 'offer':57 'opaqu':220 'page':190 'part':52 'particular':211 'path':47 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':86 'payload':206 'payment':42,115,142 'per':3,18,84,140 'platform':56,79,162 'post':111 'post-method' 'premium':5,20,36,221 'price':81,172,186 'prompt':197 'protocol':43 'provid':35 'rate':97 'readm':189 'request':85,112 'requir':101,126 'resourc':46,212 'respons':155 'return':192 'schema':203 'scheme':148 'second':152 'sentiment':167 'settl':114 'specif':45,176 'summar':170 'technic':201 'text':169 'timeout':153 'treat':216 'type':157 'unit':131 'usdc':15,30,88,117,137 'usdc-base' 'util':74 'via':10,25,39,145 'wallet':196 'web3':71 'without':207 'x402':11,26,41,103 'x402 premium API' 'x402-payment'","prices":[{"id":"22452c40-00c5-4a07-988a-050057eaf2c1","listingId":"be813377-1c24-4e34-8b42-12944b2ec9c0","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/135","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:03.117Z"}],"sources":[{"listingId":"be813377-1c24-4e34-8b42-12944b2ec9c0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/135","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:03.117Z","lastSeenAt":"2026-04-28T15:05:20.110Z"}],"details":{"listingId":"be813377-1c24-4e34-8b42-12944b2ec9c0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/135 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":{},"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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/135"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/135"},{"claim":"Platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a generation 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 can settle USDC on Base for per-call API access","Use cases requiring no signup, no API key, instant access"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume batch workloads where $0.02/request adds up quickly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:43.103Z"},"updatedAt":"2026-04-28T15:05:20.110Z"}}