{"id":"69311e15-8c3d-4346-9520-17bc9ff1fe70","shortId":"VaMzgF","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 endpoint `/api/v1/trades/41` appears to be part of a broader suite of pay-per-call APIs offered by the provider, spanning categories like data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, settled in USDC on Base.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the `exact` scheme to the specified wallet address, with the asset being USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base). The maxAmountRequired of 20000 base units equals $0.02 (USDC uses 6 decimals). The response MIME type is `application/json`. No API keys, rate limits, or commitments are required — callers simply attach an x402 payment header to each request.\n\nThe specific functionality of `/api/v1/trades/41` is not documented in the crawled material. The endpoint path suggests it may return data about a specific trade (ID 41), possibly in a finance or trading context, but this is speculative. The provider's landing page lists many endpoints but does not include this specific path among them. Documentation pages (`/docs`, `/pricing`, `/README`) returned only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-settlement","base-network","json-response","no-api-key","post-method"],"categories":["finance","data"],"synonyms":["trade data API","x402 API","pay-per-call API","USDC micropayment API","lowpaymentfee","Base network API","crypto payment API"],"warnings":["The specific endpoint /api/v1/trades/41 is not listed among the provider's documented APIs on the landing page","All documentation pages (/docs, /pricing, /README) returned only a 'Connect wallet' prompt with no useful content","No request body schema or response schema is available — the endpoint's exact functionality is unclear","The endpoint path suggests trade-specific data but this is unconfirmed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/41","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/41","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no documentation for this specific endpoint, no request/response schema, no examples, and the docs pages are empty. The exact purpose of /api/v1/trades/41 is 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'/docs':231 '/pricing':232 '/readme':233 '0.02':10,28,97,145 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':135 '20000':141 '41':200 '6':148 'Base network API' 'USDC micropayment API' 'accept':114 'access':6,24,44 'address':128 'ai':81 'among':227 'analyt':80 'api':5,16,23,34,43,71,157 'appear':58 'application/json':155 'asset':131 'attach':167 'base':8,26,52,104,137,142 'base-network' 'broader':64 'call':70 'caller':165 'categori':77 'challeng':107 'commit':162 'confirm':108 'connect':237 'content':243 'context':207 'contract':134 'crawl':185 'crypto payment API' 'data':79,194 'decim':149 'document':182,229 'endpoint':38,56,90,110,188,219 'equal':144 'exact':122 'financ':84,204 'function':177 'gate':3,21 'header':171 'id':199 'includ':223 'infrastructur':87 'json-response' 'key':17,35,158 'land':215 'learn':83 'like':78 'limit':160 'list':217 'live':112 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':82 'made':119 'mani':218 'materi':186 'maxamountrequir':139 'may':192 'mime':152 'network':53 'no-api-key' 'offer':72 'page':216,230 'part':61 'path':189,226 'pay':9,27,68 'pay-per-cal':67 'pay-per-call API' 'payment':48,117,170 'per':11,29,69,98 'per-request-billing' 'platform':93 'possibl':201 'post':115 'post-method' 'premium':4,22,42 'price':95 'prompt':239 'protocol':49 'provid':41,75,213 'rate':159 'request':12,30,99,116,174 'requir':18,36,164 'respons':151 'return':193,234 'scheme':123 'settl':100 'simpli':166 'span':76 'specif':55,176,197,225 'specifi':126 'specul':211 'substant':242 'suggest':190 'suit':65 'trade':198,206 'trade data API' 'type':153 'unit':143 'usdc':14,32,102,133,146 'usdc-settlement' 'use':147 'util':88 'via':45,120 'wallet':127,238 'web3':85 'x402':2,20,47,106,169 'x402 API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"42d8b50e-8054-4d99-abcd-41dfc8a6a6b7","listingId":"69311e15-8c3d-4346-9520-17bc9ff1fe70","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/41","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:50.902Z"}],"sources":[{"listingId":"69311e15-8c3d-4346-9520-17bc9ff1fe70","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/41","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:50.902Z","lastSeenAt":"2026-04-26T04:03:40.844Z"}],"details":{"listingId":"69311e15-8c3d-4346-9520-17bc9ff1fe70","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/41 \\\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 with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/41"},{"claim":"All endpoints on the platform are priced at $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/trades/41"}],"useCases":["Fetching trade data on a per-request payment basis without needing an API key","Integrating pay-per-call endpoints into autonomous agent workflows via x402","Accessing premium data feeds settled in USDC on Base L2"],"bestFor":["Agents or applications that need keyless, pay-as-you-go API access","Developers who prefer crypto micropayments over subscription billing","x402-compatible clients on the Base network"],"notFor":["Users who need detailed documentation or OpenAPI schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:45.732Z"},"updatedAt":"2026-04-26T04:03:40.844Z"}}