{"id":"bf28ac66-1d2b-4f1e-9d87-bb7253b7be1a","shortId":"yxEQqR","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 part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories. The specific resource `/api/v1/generate/resource/127` is listed under \"Premium API Access\" and is paid via the x402 protocol on the Base network using USDC.\n\nThe platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, no minimums, and instant access. Payment is settled on-chain via USDC (contract 0x8335…2913 on Base). The x402 challenge confirms the endpoint is live, accepting POST requests with a maxAmountRequired of 20000 base units (i.e., $0.02 USDC at 6 decimals). The payment timeout is 300 seconds.\n\nHowever, the actual functionality behind this specific resource path (`/resource/127`) is unclear. The platform's landing page lists many endpoint categories (analytics, AI, finance, utilities) but does not map numbered resource IDs to specific capabilities. Documentation pages (`/docs`, `/pricing`, `/README`) returned only a \"Connect wallet\" prompt with no substantive content. Without further documentation or example responses, the exact data or service returned by this endpoint cannot be confirmed.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method"],"categories":["infrastructure","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The exact functionality of /api/v1/generate/resource/127 is undocumented and unknown.","All documentation pages (/docs, /pricing, /README) returned no substantive content — only a 'Connect wallet' prompt.","No OpenAPI spec, request schema, or response schema is available.","The platform lists many endpoint categories but does not explain what numbered resource IDs correspond to."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/127","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/127","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 per call), but there is no documentation, no OpenAPI schema, no example requests or responses, and the specific functionality of resource/127 is unknown. The docs, pricing, and README pages all returned only 'Connect wallet' with no 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'/docs':181 '/pricing':182 '/readme':183 '/request':13,28 '/resource/127':153 '0.02':12,27,83,133 '0x8335':110 '20000':129 '2913':111 '300':142 '6':136 'Base network API' 'USDC micropayment API' 'accept':122 'access':7,22,64,100 'across':47,86 'actual':146 'advertis':80 'ai':166 'ai/ml':50 'analyt':49,165 'api':6,21,46,63,91 'base':9,24,74,113,130 'base-network' 'behind':148 'broader':39 'call':4,19 'cannot':209 'capabl':178 'categori':54,164 'chain':106 'challeng':116 'confirm':117,211 'connect':187 'content':193 'contract':109 'crypto-paid API' 'data':48,202 'decim':137 'document':179,196 'endpoint':32,88,119,163,208 'exact':201 'exampl':198 'financ':167 'finance/web3':51 'flat':82 'function':147 'howev':144 'i.e':132 'id':175 'infrastructur':53 'instant':99 'key':92 'land':159 'limit':95 'list':60,161 'live':121 'lowpaymentfee' 'lowpaymentfee.com':34 'mani':162 'map':172 'maxamountrequir':127 'minimum':97 'network':75 'no-api-key' 'number':173 'offer':41 'on-chain':104 'page':160,180 'paid':67 'part':36 'path':152 'pay':2,17,43 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':42 'payment':101,139 'per':3,18,44,84 'platform':40,79,157 'post':123 'post-method' 'premium':5,20,62 'premium API access' 'prompt':189 'protocol':71 'rate':94 'request':45,85,124 'resourc':57,151,174 'respons':199 'return':184,205 'second':143 'servic':204 'settl':103 'specif':56,150,177 'substant':192 'timeout':140 'unclear':155 'unit':131 'usdc':15,30,77,108,134 'usdc-settlement' 'use':76 'util':168 'via':10,25,68,107 'wallet':188 'without':194 'x402':11,26,70,115 'x402 API' 'x402-payment'","prices":[{"id":"3899db9d-a194-42fa-bd48-b47afd241ade","listingId":"bf28ac66-1d2b-4f1e-9d87-bb7253b7be1a","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/127","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:42.100Z"}],"sources":[{"listingId":"bf28ac66-1d2b-4f1e-9d87-bb7253b7be1a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/127","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:42.100Z","lastSeenAt":"2026-04-24T10:32:11.803Z"}],"details":{"listingId":"bf28ac66-1d2b-4f1e-9d87-bb7253b7be1a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/127 \\\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 platform charges $0.02 per request with no API keys, no rate limits, and no minimums.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base network with a 300-second timeout.","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/127"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/127"},{"claim":"Documentation pages (/docs, /pricing, /README) returned only 'Connect wallet' with no further content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API resources with per-call USDC micropayments on Base","Agent-driven workflows that need keyless, on-demand API access","Integrating pay-as-you-go endpoints without subscription commitments"],"bestFor":["Developers wanting zero-commitment, per-request API billing","AI agents that can settle x402 payments autonomously on Base","Projects needing low-friction API access without API key management"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume use cases where per-request pricing may add up versus bulk plans","Anyone unable to transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:44.199Z"},"updatedAt":"2026-04-24T10:32:11.803Z"}}