{"id":"ad8da944-becd-443e-b509-aca0158746cc","shortId":"fCpamd","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 is part of the lowpaymentfee.com platform, which offers a suite of x402-protocol pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. The specific resource at `/api/v1/generate/resource/107` is listed as \"Premium API Access\" but its exact functionality is not documented beyond that label. It is likely one of the generation/utility endpoints offered by the platform.\n\nThe endpoint is live and returns a standard x402 payment challenge. It accepts payment via the \"exact\" scheme on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required is 20,000 base units of USDC, which with 6 decimals equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing. Payment is made via the `X-PAYMENT` header. No API keys are required; access is granted purely through per-call micropayments.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what this specific resource returns. The platform advertises no rate limits and instant access, but without concrete documentation it is unclear what input parameters the endpoint expects or what output it produces.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","pay-per-request","no-api-key","post-method"],"categories":["infrastructure","utility"],"synonyms":["premium API","lowpaymentfee","x402 API","micropayment API","USDC pay-per-call","Base network API","generation endpoint"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","The specific functionality of resource/107 ('Premium API Access') is completely undocumented","No OpenAPI schema or request/response examples are provided","No way to determine expected input parameters or output format without trial-and-error"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/107","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/107","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is essentially no documentation: no OpenAPI schema, no request/response examples, no description of what 'Premium API Access' actually does. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':17,34,152 '0.02':16,33,142,151 '000':132 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':125 '20':131 '6':139 'Base network API' 'USDC pay-per-call' 'accept':112 'access':77,168,224 'addit':197 'advertis':218 'ai':59 'amount':128 'analyt':58 'api':5,22,55,76,164,183 'base':8,25,120,133 'base-network' 'beyond':85 'call':12,29,175 'challeng':110 'concret':227 'connect':192 'consist':145 'content':198 'contract':124 'data':57 'decim':140 'descript':209 'doc':182 'document':84,177,228 'endpoint':6,23,36,95,101,236 'equal':141 'exact':80,116 'exampl':206 'expect':237 'extrem':179 'financ':62 'function':81 'gate':3,20 'generation endpoint' 'generation/utility':94 'grant':170 'header':162 'infrastructur':65 'input':233 'instant':223 'key':165 'label':87 'learn':61 'like':90 'limit':221 'list':73 'live':103 'lowpaymentfee' 'lowpaymentfee.com':41 'machin':60 'made':156 'maximum':127 'micropay':176 'micropayment API' 'network':121 'no-api-key' 'offer':44,96 'one':91 'openapi':202 'output':240 'page':187 'paramet':234 'part':38 'pay':10,27,52 'pay-per-cal':9,26 'pay-per-request':51 'payment':109,113,154,161 'per':11,28,53,143,174 'per-cal':173 'platform':42,99,148,217 'post-method' 'premium':4,21,75 'premium API' 'price':153,184 'produc':242 'prompt':194 'protocol':50 'pure':171 'rate':220 'readm':186 'render':189 'request':54,144 'request/response':205 'requir':129,167 'resourc':69,214 'return':105,215 'schema':203 'scheme':117 'span':56 'spars':180 'specif':68,213 'standard':107 'suit':46 'unclear':231 'uniform':150 'unit':134 'usdc':14,31,123,136 'usdc-micropayment' 'use':122 'util':66 'via':114,157 'wallet':193 'web3':63 'without':226 'x':160 'x-payment':159 'x402':2,19,49,108 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':48","prices":[{"id":"6d5fdf6d-598a-466a-9bf8-6ef333b25e52","listingId":"ad8da944-becd-443e-b509-aca0158746cc","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/107","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:06.117Z"}],"sources":[{"listingId":"ad8da944-becd-443e-b509-aca0158746cc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/107","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:06.117Z","lastSeenAt":"2026-04-28T13:33:07.131Z"}],"details":{"listingId":"ad8da944-becd-443e-b509-aca0158746cc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/107 \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/107"},{"claim":"Platform-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/107"}],"useCases":["Accessing a pay-per-call utility or generation service without needing API keys","Demonstrating x402 protocol micropayment integration on Base","Building agent workflows that pay for API access with USDC on-chain"],"bestFor":["Developers experimenting with x402 micropayment protocols","Agents that need keyless, on-demand API access via crypto payments","Low-volume or sporadic usage where $0.02/call flat pricing is attractive"],"notFor":["Users who need detailed API documentation and well-defined schemas before integrating","High-volume production workloads where per-call crypto settlement overhead matters","Users without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:42.994Z"},"updatedAt":"2026-04-28T13:33:07.131Z"}}