{"id":"40b9c7f6-6b70-4e6e-89f3-d320ae831ae8","shortId":"4N24VY","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/43` appears to be part of a broader platform offering dozens of API endpoints spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made in USDC (contract `0x8335…2913` on Base) with a max amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). There are no API keys required, no rate limits advertised, and access is instant once payment is included in the `X-PAYMENT` header. The timeout window is 300 seconds.\n\nDocumentation is extremely thin — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no substantive content. The specific functionality of `/api/v1/generate/resource/43` is not documented beyond the label \"Premium API Access,\" so it is unclear what this particular resource generates or returns. The platform lists a `/api/v1/utils/generate` \"Generation\" endpoint separately, so this numbered resource path may be a dynamically created or user-specific generation endpoint. Without further documentation, the exact input/output behavior cannot be confirmed.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","post-method","json-response"],"categories":["infrastructure","utility"],"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/43 is undocumented — it is unclear what it generates or what inputs it expects.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content.","No output schema or example responses are available; integration requires trial-and-error.","The numbered resource path (/resource/43) suggests this may be a dynamic or user-specific endpoint rather than a stable public API."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/43","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/43","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 virtually no documentation: docs/pricing/API/README pages all show only 'Connect wallet'. The specific functionality of resource/43 is undocumented, no input or output schema is provided, and no example responses exist. This is effectively a stub 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'/api/v1/utils/generate':205 '/request':13,28 '0.02':12,27,76,119 '000':114 '0x8335':104 '20':113 '2913':105 '300':152 '6':122 'Base network API' 'USDC micropayment API' 'accept':95 'access':7,22,38,135,189 'advertis':133 'ai/ml':65 'amount':111 'analyt':64 'api':6,21,37,60,127,161,188 'appear':49 'base':9,24,84,107,115 'behavior':231 'beyond':184 'broader':55 'call':4,19 'cannot':232 'challeng':88 'confirm':89,234 'connect':169 'content':175 'contract':103 'creat':218 'crypto-paid API' 'data':63,69 'decim':123 'doc':159 'document':154,183,227 'dozen':58 'dynam':217 'endpoint':32,61,91,207,224 'equal':118 'exact':229 'extrem':156 'financ':67 'function':178 'generat':198,206,223 'header':147 'includ':141 'infer':66 'infrastructur':71 'input/output':230 'instant':137 'json-response' 'key':128 'label':186 'limit':132 'list':203 'live':93 'lowpaymentfee' 'lowpaymentfee.com':34 'made':100 'max':110 'may':214 'network':85 'no-api-key' 'number':211 'offer':57 'page':164 'part':52 'particular':196 'path':47,213 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,98,139,146 'per':3,18,77 'platform':56,202 'post':96 'post-method' 'premium':5,20,36,187 'premium API access' 'price':74,160 'prompt':171 'protocol':43 'provid':35 'rate':131 'readm':163 'render':166 'request':78,97 'requir':129 'resourc':46,197,212 'return':200 'second':153 'separ':208 'settl':79 'span':62 'specif':45,177,222 'substant':174 'thin':157 'timeout':149 'unclear':193 'unit':116 'usdc':15,30,81,102,120 'usdc-base' 'use':121 'user':221 'user-specif':220 'util':72 'via':10,25,39 'wallet':170 'web3':68 'window':150 'without':225 'x':145 'x-payment':144 'x402':11,26,41,87 'x402 API' 'x402-payment'","prices":[{"id":"ba77ad84-158a-4aaf-9b3a-1c0e396a9e25","listingId":"40b9c7f6-6b70-4e6e-89f3-d320ae831ae8","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/43","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:20.339Z"}],"sources":[{"listingId":"40b9c7f6-6b70-4e6e-89f3-d320ae831ae8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/43","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:20.339Z","lastSeenAt":"2026-04-28T17:34:18.662Z"}],"details":{"listingId":"40b9c7f6-6b70-4e6e-89f3-d320ae831ae8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/43 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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/43"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/43"},{"claim":"Platform advertises $0.02/request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"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 need keyless, instant API access without subscriptions","Low-volume or bursty workloads where $0.02/call is cost-effective"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume batch processing where per-call pricing adds up quickly","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:45.223Z"},"updatedAt":"2026-04-28T17:34:18.662Z"}}