{"id":"7a24429c-8cee-438c-b715-2b57592712ce","shortId":"C2Gc2b","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","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/115` appears to be part of a broader platform offering dozens of pay-per-call API 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 valid x402 challenge (HTTP 402) requesting payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) via the \"exact\" scheme. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The response MIME type is application/json and the input method is HTTP POST.\n\nHowever, the specific functionality of `/api/v1/trades/115` is unclear. The site's landing page lists categories like Data & Analytics, AI & ML, Finance & Web3, and Infrastructure, but does not explicitly list a `/trades/` path. The \"115\" in the URL may be a resource or trade ID. Documentation pages (docs, pricing, README) returned only a \"Connect wallet\" prompt with no substantive content. Without further documentation, the exact request body schema and response format for this particular endpoint remain unknown.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","pay-per-request","json-api","http-post"],"categories":["finance","data"],"synonyms":["trades API","x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API"],"warnings":["The specific endpoint /api/v1/trades/115 is not listed on the site's landing page; its exact functionality is unknown.","All documentation pages (docs, pricing, README) returned no useful content — only 'Connect wallet'.","No request body schema or response schema is available; callers must discover behavior empirically.","The '115' in the path may be a specific resource ID, meaning this listing may represent a single record rather than a general-purpose endpoint."],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/115","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/115","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/115 is not described anywhere in the crawled material. The docs, pricing, and README pages are all blank beyond a wallet-connect 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'/trades':173 '0.02':10,24,80,114 '000':103 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':124 '0x8335':108 '115':176 '20':102 '2913':109 '300':127 '402':96 '6':112 'Base network API' 'USDC micropayment API' 'access':6,20,36 'address':123 'ai':161 'ai/ml':70 'analyt':69,160 'api':5,19,35,65 'appear':50 'application/json':135 'base':8,22,44,104,111 'base-network' 'bodi':208 'broader':56 'call':64 'categori':157 'challeng':94 'connect':195 'content':201 'data':68,73,159 'decim':113 'doc':189 'document':187,204 'dozen':59 'endpoint':30,66,86,216 'exact':117,206 'explicit':170 'financ':163 'finance/web3':72 'format':212 'function':146 'gate':3,17 'howev':143 'http':95,141 'http-post' 'id':186 'infer':71 'infrastructur':75,166 'input':138 'json-api' 'land':154 'like':158 'list':156,171 'live':88 'lowpaymentfee' 'lowpaymentfee.com':32 'may':180 'method':139 'mime':132 'ml':162 'network':45 'offer':58 'page':155,188 'part':53 'particular':215 'path':174 'pay':9,23,62 'pay-per-cal':61 'pay-per-call API' 'pay-per-request' 'payment':40,98,119 'per':11,25,63,81 'platform':57 'post':142 'premium':4,18,34 'premium API' 'price':78,190 'prompt':197 'protocol':41 'provid':33 'readm':191 'remain':217 'request':12,26,82,97,207 'resourc':48,183 'respons':131,211 'return':90,192 'schema':209 'scheme':118 'second':128 'sent':121 'site':152 'span':67 'specif':47,145 'substant':200 'timeout':129 'trade':185 'trades API' 'type':133 'unclear':150 'unit':105 'unknown':218 'url':179 'usdc':14,28,84,107 'usdc-payment' 'util':76 'valid':92 'via':37,115 'wallet':196 'web3':164 'without':202 'x402':2,16,39,93 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"31455d7a-5be6-4a38-ab1a-473441fbf012","listingId":"7a24429c-8cee-438c-b715-2b57592712ce","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/115","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:32.171Z"}],"sources":[{"listingId":"7a24429c-8cee-438c-b715-2b57592712ce","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/115","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:32.171Z","lastSeenAt":"2026-04-26T08:03:30.531Z"}],"details":{"listingId":"7a24429c-8cee-438c-b715-2b57592712ce","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/115 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/115"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/trades/115"},{"claim":"The site advertises $0.02 per request across all listed endpoints with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"Listed API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching trade-related data with per-request USDC micropayments","Integrating pay-per-call APIs into agent workflows without API keys","Accessing financial or trading information on-demand via x402 protocol"],"bestFor":["Agents or developers wanting keyless, pay-per-use API access","x402-compatible wallets on Base network","Low-friction micropayment API consumption at $0.02/call"],"notFor":["Users needing detailed API documentation or schemas before integration","High-volume use cases where per-request pricing may add up","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:46.522Z"},"updatedAt":"2026-04-26T08:03:30.531Z"}}