{"id":"0e0e44a5-ceea-435c-9e63-28b4d0080c3d","shortId":"3HRmP9","kind":"x402","title":"Pay-per-call trade data endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call trade data endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at `/api/v1/trades/31` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol APIs spanning data & analytics, AI/ML, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol on the Base network, accepting USDC (USD Coin) for per-request micropayments with no API keys, no rate limits, and no subscriptions required.\n\nThe specific endpoint `/api/v1/trades/31` is listed under \"Premium API Access\" and accepts POST requests. The x402 challenge indicates a maximum payment of 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the site's uniform $0.02/request pricing across all endpoints. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on the Base L2 network, with a 300-second timeout window.\n\nHowever, the exact data returned by this particular endpoint is unclear. The path suggests trade-related data (possibly a specific trade record with ID 31), but no documentation, request schema, or response schema is available beyond the generic \"Premium API Access\" label. The site's docs, pricing, and API pages all render only a wallet-connect prompt with no additional technical documentation. Agents should be aware that the actual payload and required POST body are undocumented.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","trade-data"],"categories":["finance","data"],"synonyms":["trade API","x402 trade endpoint","micropayment API","USDC pay-per-call","lowpaymentfee","Base network API","crypto trade data"],"warnings":["No request or response schema documented — the POST body format is unknown","The endpoint path '/api/v1/trades/31' suggests a specific resource (trade ID 31) but this is unconfirmed","All documentation pages (docs, pricing, API, README) render only a wallet-connect prompt with no technical content","The 'Premium API Access' label is generic and does not describe what data is returned"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/31","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/31","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation on request/response schemas, no OpenAPI spec, and the purpose of '/api/v1/trades/31' is only vaguely described as 'Premium API Access'. The docs pages render only wallet-connect prompts with no usable 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'/request':17,34,135 '0.02':16,33,125,134 '000':116 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':145 '20':115 '300':153 '31':182 '6':121 'Base network API' 'USDC pay-per-call' 'accept':73,104 'access':102,198 'across':137 'actual':227 'addit':218 'address':144 'agent':221 'ai/ml':57 'analyt':56 'api':53,84,101,197,206 'avail':192 'awar':224 'base':9,26,71,117,148 'base-network' 'beyond':193 'bodi':232 'call':4,21 'challeng':109 'coin':76 'collect':48 'connect':214 'consist':128 'crypto trade data' 'data':6,23,55,160,174 'decim':122 'doc':203 'document':185,220 'endpoint':7,24,36,63,95,139,165 'equal':124 'exact':159 'finance/web3':58 'generic':195 'howev':157 'id':181 'indic':110 'infrastructur':60 'key':85 'l2':149 'label':199 'limit':88 'list':98 'lowpaymentfee' 'lowpaymentfee.com':43 'made':142 'maximum':112 'micropay':81 'micropayment API' 'network':72,150 'no-api-key' 'offer':46 'page':207 'part':40 'particular':164 'path':169 'pay':2,19 'pay-per-cal':1,18 'payload':228 'payment':67,113,140 'per':3,20,79,126 'per-request':78 'per-request-billing' 'platform':44 'possibl':175 'post':105,231 'premium':100,196 'price':136,204 'prompt':215 'protocol':52,68 'rate':87 'record':179 'relat':173 'render':209 'request':80,106,127,186 'requir':92,230 'respons':189 'return':161 'schema':187,190 'second':154 'settl':12,29 'site':131,201 'span':54 'specif':94,177 'subscript':91 'suggest':170 'technic':219 'timeout':155 'trade':5,22,172,178 'trade API' 'trade-data' 'trade-rel':171 'unclear':167 'undocu':234 'uniform':133 'unit':118 'usd':75 'usdc':14,31,74,120 'usdc-micropayment' 'use':64 'util':61 'via':10,27 'wallet':213 'wallet-connect':212 'window':156 'x402':11,28,51,66,108 'x402 trade endpoint' 'x402-payment' 'x402-protocol':50","prices":[{"id":"d335ed03-55cf-4650-b19b-2f7044d96145","listingId":"0e0e44a5-ceea-435c-9e63-28b4d0080c3d","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/31","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:53.898Z"}],"sources":[{"listingId":"0e0e44a5-ceea-435c-9e63-28b4d0080c3d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/31","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:53.898Z","lastSeenAt":"2026-04-26T04:03:40.975Z"}],"details":{"listingId":"0e0e44a5-ceea-435c-9e63-28b4d0080c3d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/31 \\\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 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/trades/31"},{"claim":"All endpoints 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":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/trades/31"}],"useCases":["Fetching trade data on-demand with per-call USDC micropayments","Integrating pay-per-use trade information into autonomous agents","Accessing financial trade records without subscription or API key management"],"bestFor":["Agents that need keyless, pay-per-call access to trade data","Developers experimenting with x402 micropayment protocol on Base","Use cases requiring low-friction, no-commitment API access"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone needing non-USDC or non-Base-network payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:45.562Z"},"updatedAt":"2026-04-26T04:03:40.975Z"}}