{"id":"192cd91a-9297-4e77-b36c-b5748b63fdec","shortId":"Raa9Bs","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.","description":"This endpoint is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. The specific resource at `/api/v1/generate/resource/117` is listed as \"Premium API Access\" but its exact functionality is not documented beyond that label.\n\nThe endpoint is live and returns a standard x402 payment challenge. It accepts POST requests and settles payments on the Base network using USDC (contract `0x8335...2913`). The maximum amount required per call is 20,000 base units of USDC, which with 6 decimals equals $0.02 USD — consistent with the platform's uniform $0.02/request pricing. Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a 300-second timeout.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what this particular resource actually returns. The endpoint appears to be one of many on the platform, all priced identically, but without documentation it is unclear what data or service resource 117 provides.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method"],"categories":["api-gateway","infrastructure"],"synonyms":["lowpaymentfee","x402 API","pay-per-call API","USDC micropayment API","Base network API","premium API access","crypto-paid API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","The exact purpose and output of /api/v1/generate/resource/117 ('Premium API Access') is undocumented","No OpenAPI schema, no request body schema, and no response examples are provided","Cannot verify what data or service this endpoint actually returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/117","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/117","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 zero documentation on what resource 117 actually does, no request/response schema, and no examples. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':146 '0.02':10,29,137,145 '000':127 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':157 '0x8335':117 '117':241 '20':126 '2913':118 '300':160 '6':134 'Base network API' 'USDC micropayment API' 'accept':104 'access':6,25,81,174 'actual':214 'address':156 'advertis':165 'ai':63 'amount':121 'analyt':62 'api':5,24,59,80,167,182 'appear':218 'base':8,27,112,128 'base-network' 'beyond':89 'call':58,124 'challeng':102 'collect':50 'connect':191 'consist':139 'content':197 'contract':116 'crypto-paid API' 'data':61,237 'decim':135 'descript':208 'doc':181 'document':88,176,232 'endpoint':40,93,217 'equal':136 'exact':84,153 'exampl':205 'extrem':178 'financ':66 'function':85 'gate':3,22 'howev':175 'ident':229 'infrastructur':69 'instant':173 'key':16,35,168 'label':91 'learn':65 'limit':19,38,171 'list':77 'live':95 'lowpaymentfee' 'lowpaymentfee.com':45 'machin':64 'made':150 'mani':223 'maximum':120 'network':113 'no-api-key' 'offer':48 'one':221 'openapi':201 'page':186 'part':42 'particular':212 'pay':9,28,56 'pay-per-cal':55 'pay-per-call API' 'pay-per-request' 'payment':101,109,148 'per':11,30,57,123 'platform':46,142,164,226 'post':105 'post-method' 'premium':4,23,79 'premium API access' 'price':147,183,228 'prompt':193 'protocol':54 'provid':242 'rate':18,37,170 'readm':185 'render':188 'request':12,31,106 'request/response':204 'requir':122 'resourc':73,213,240 'return':97,215 'schema':202 'scheme':154 'second':161 'servic':239 'settl':108 'span':60 'spars':179 'specif':72 'standard':99 'substant':196 'timeout':162 'unclear':235 'uniform':144 'unit':129 'usd':138 'usdc':14,33,115,131 'usdc-settlement' 'use':114 'util':70 'via':151 'wallet':192 'web3':67 'without':231 'x402':2,21,53,100 'x402 API' 'x402-gated':1,20 'x402-payment' 'x402-protocol':52","prices":[{"id":"f8ee9ccd-d261-4df0-9823-1f26d2a55bb7","listingId":"192cd91a-9297-4e77-b36c-b5748b63fdec","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/117","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:07.949Z"}],"sources":[{"listingId":"192cd91a-9297-4e77-b36c-b5748b63fdec","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/117","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:07.949Z","lastSeenAt":"2026-04-24T10:32:13.211Z"}],"details":{"listingId":"192cd91a-9297-4e77-b36c-b5748b63fdec","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/117 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","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/117"},{"claim":"Platform 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/117"}],"useCases":["Programmatic access to a premium resource via x402 micropayment without needing API keys","Agent-driven workflows that need on-demand paid API calls settled in USDC on Base","Integrating pay-per-use API calls into Web3 applications"],"bestFor":["Developers wanting keyless, pay-per-call API access on Base","AI agents with USDC wallets that need frictionless endpoint access","Prototyping with low-cost ($0.02) per-request pricing"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume use cases where per-request crypto settlement overhead is impractical","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:42.899Z"},"updatedAt":"2026-04-24T10:32:13.211Z"}}