{"id":"1254a4fd-ba93-402a-8e82-e84606aac35b","shortId":"tnhbaz","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The specific resource `/api/v1/trades/192` appears to be part of a broader platform offering dozens of pay-per-call endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request in USDC.\n\nThe endpoint is live and returns a standard x402 challenge (HTTP 402) requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the \"exact\" scheme with a 300-second timeout. The response MIME type is application/json and the intended HTTP method is POST.\n\nHowever, the specific functionality behind `/api/v1/trades/192` is unclear. The endpoint path suggests a trade-related resource (possibly retrieving or executing a specific trade record), but no documentation, request schema, or response schema is available beyond the generic \"Premium API Access\" label. The broader site lists categories like finance/price feeds, crypto quotes, and gas estimates, so this may relate to trading data. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content, leaving the actual behavior of this endpoint undocumented.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","post-method"],"categories":["finance","data"],"synonyms":["trade data API","x402 endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee","crypto trade endpoint"],"warnings":["No documentation available — docs, pricing, API, and README pages all render only 'Connect wallet'","The specific functionality of /api/v1/trades/192 is undocumented; 'Premium API Access' is a generic label applied to all endpoints","No request body schema or response schema provided","No examples of successful responses available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/192","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/trades/192","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, but there is no documentation, no request/response schema, and the specific purpose of /api/v1/trades/192 is unclear. The docs pages are empty (only 'Connect wallet'). This is effectively a stub 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'0.02':10,28,87,121 '000':110 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':132 '0x8335':115 '20':109 '2913':116 '300':139 '402':103 '6':125 'Base network API' 'USDC micropayment API' 'access':6,24,44,195 'actual':236 'address':131 'ai/ml':77 'analyt':76 'api':5,16,23,34,43,194,221 'appear':58 'application/json':147 'avail':189 'base':8,26,52,111,118 'behavior':237 'behind':159 'beyond':190 'broader':64,198 'call':72 'categori':201 'challeng':101 'connect':227 'content':233 'crypto':205 'crypto trade endpoint' 'data':75,80,216 'decim':126 'doc':218 'document':182 'dozen':67 'endpoint':38,73,93,164,240 'equal':120 'estim':209 'exact':135 'execut':175 'feed':204 'finance/price':203 'finance/web3':79 'function':158 'gas':208 'gate':3,21 'generic':192 'given':122 'howev':155 'http':102,151 'infer':78 'infrastructur':82 'intend':150 'json-response' 'key':17,35 'label':196 'leav':234 'like':202 'list':200 'live':95 'lowpaymentfee' 'lowpaymentfee.com':40 'may':212 'method':152 'mime':144 'network':53 'no-api-key' 'offer':66 'page':222 'part':61 'path':165 'pay':9,27,70 'pay-per-cal':69 'pay-per-call API' 'pay-per-request' 'payment':48,105,127 'per':11,29,71,88 'platform':65 'possibl':172 'post':154 'post-method' 'premium':4,22,42,193 'price':85,219 'prompt':229 'protocol':49 'provid':41 'quot':206 'record':179 'relat':170,213 'render':224 'request':12,30,89,104,183 'requir':18,36 'resourc':56,171 'respons':143,186 'retriev':173 'return':97 'schema':184,187 'scheme':136 'second':140 'sent':129 'site':199 'span':74 'specif':55,157,177 'standard':99 'suggest':166 'timeout':141 'trade':169,178,215 'trade data API' 'trade-rel':168 'type':145 'unclear':162 'undocu':241 'unit':112 'usdc':14,32,91,114,123 'usdc-base' 'use':133 'util':83 'via':45 'wallet':228 'x402':2,20,47,100 'x402 endpoint' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"daad52b4-5e60-4cb4-879f-81c826778cbf","listingId":"1254a4fd-ba93-402a-8e82-e84606aac35b","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/trades/192","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:48.543Z"}],"sources":[{"listingId":"1254a4fd-ba93-402a-8e82-e84606aac35b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/192","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:48.543Z","lastSeenAt":"2026-04-26T05:32:46.008Z"}],"details":{"listingId":"1254a4fd-ba93-402a-8e82-e84606aac35b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/192 \\\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 requesting up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/192"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/trades/192"}],"useCases":["Retrieving trade-related data via a single paid API call","Integrating pay-per-request data access into agent workflows without API key management","Programmatic access to premium content settled in USDC on Base"],"bestFor":["Agents or bots that need keyless, pay-as-you-go API access","Developers wanting to test x402 payment flows on Base","Use cases requiring low-cost per-request data retrieval without subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Anyone needing non-USDC or non-Base payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:45.787Z"},"updatedAt":"2026-04-26T05:32:46.008Z"}}