{"id":"37ec7a6e-5efc-49a8-980f-a4bdbb3ec997","shortId":"UADEqS","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 is one of many x402-enabled API resources offered by the platform. The specific resource `/api/v1/generate/resource/13` is labeled \"Premium API Access\" and accepts POST requests, settling payments in USDC on the Base network. The x402 challenge confirms the endpoint is live, requiring a maximum of 20,000 base units of USDC (i.e., $0.02 per request, since USDC uses 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a suite of endpoints spanning 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 utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nHowever, the specific functionality behind `/api/v1/generate/resource/13` is not documented beyond the generic label \"Premium API Access.\" There is no OpenAPI schema, no request/response examples, and the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional content. Without documentation or sample payloads, it is unclear what this particular resource generates or what input it expects.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["infrastructure","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","crypto-paid API","402 payment endpoint"],"warnings":["No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content","The specific functionality of /api/v1/generate/resource/13 is unknown; 'Premium API Access' is a generic label","No OpenAPI schema or request/response examples provided","No information on what input the POST endpoint expects or what it returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/13","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/13","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality of resource/13 is entirely undocumented. The docs pages are empty beyond a wallet-connect 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'/request':13,28 '0.02':12,27,88,144 '000':82 '20':81 '402 payment endpoint' '6':94 'Base network API' 'USDC micropayment API' 'accept':58 'access':7,22,56,173 'addit':198 'advertis':100 'ai':113 'analysi':117 'analyt':107 'api':6,21,42,55,149,172,187 'base':9,24,67,83 'base-network' 'behind':162 'beyond':167 'broader':97 'call':4,19 'challeng':71 'classif':120 'commit':156 'confirm':72 'connect':193 'content':199 'convers':137 'crypto-paid API' 'data':106,110 'decim':95 'doc':184 'document':166,201 'embed':121 'enabl':41 'endpoint':32,74,104,140 'estim':131 'exampl':181 'exchang':126 'expect':217 'export':111 'feed':125 'financ':122 'function':161 'gas':130 'generat':138,212 'generic':169 'geocod':135 'howev':158 'i.e':87 'infrastructur':133 'input':215 'insight':112 'key':150 'label':53,170 'learn':115 'limit':153 'list':142 'live':76 'lowpaymentfee' 'lowpaymentfee.com':34,98 'machin':114 'mani':38 'maximum':79 'metric':108 'network':68 'no-api-key' 'offer':44 'one':36 'openapi':177 'page':188 'particular':210 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payload':204 'payment':62 'per':3,18,89,145 'platform':47,99 'post':59 'post-endpoint' 'premium':5,20,54,171 'price':124,185 'prompt':195 'quot':129 'rate':127,152 'render':190 'report':109 'request':60,90,146 'request/response':180 'requir':77,157 'resourc':43,50,211 'sampl':203 'schema':178 'sentiment':116 'settl':61 'sinc':91 'span':105 'specif':49,160 'suit':102 'summar':119 'text':118 'token':128 'unclear':207 'unit':84 'usdc':15,30,64,86,92 'usdc-settlement' 'use':93 'util':134 'valid':136 'via':10,25 'wallet':194 'web3':123 'without':200 'x402':11,26,40,70 'x402 API' 'x402-enabled':39 'x402-payment'","prices":[{"id":"d0941b90-afb8-46b2-8ac8-e45e3b5cb221","listingId":"37ec7a6e-5efc-49a8-980f-a4bdbb3ec997","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/13","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:31.588Z"}],"sources":[{"listingId":"37ec7a6e-5efc-49a8-980f-a4bdbb3ec997","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/13","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:31.588Z","lastSeenAt":"2026-04-24T10:32:14.750Z"}],"details":{"listingId":"37ec7a6e-5efc-49a8-980f-a4bdbb3ec997","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/13 \\\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 402 challenge requiring 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/13"},{"claim":"All endpoints are priced 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"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/13"}],"useCases":["Programmatic access to a premium API resource without needing API keys or subscriptions","Agent-driven workflows that pay per call using USDC on Base","Testing x402 payment flows against a low-cost live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol integrations","AI agents that need keyless, pay-per-use API access","Low-cost micropayment API consumption on Base L2"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Use cases requiring known, well-documented request/response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:41.601Z"},"updatedAt":"2026-04-24T10:32:14.750Z"}}