{"id":"6cd14a6f-7e1b-472a-ac00-9b273c99396f","shortId":"egXnxd","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 a collection of pay-per-call APIs gated by the x402 protocol on the Base network. The specific endpoint `/api/v1/trades/8` is listed under \"Premium API Access\" and accepts POST requests, settling payments in USDC (contract 0x8335…2913 on Base). The x402 challenge advertises a max amount of 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe broader lowpaymentfee.com platform offers endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments.\n\nHowever, the specific `/api/v1/trades/8` endpoint does not appear in any of the documented API categories on the landing page, and no documentation, request schema, or response schema is available for it. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. The actual functionality behind this particular endpoint is unclear — the name suggests trade-related data but this cannot be confirmed from available material.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method","json-response"],"categories":["finance","data"],"synonyms":["trades API","premium API","x402 API","pay-per-call API","USDC micropayment API","lowpaymentfee","Base network API"],"warnings":["The /api/v1/trades/8 endpoint is not listed among the documented APIs on the landing page — its actual functionality is unknown.","No request body schema or response schema is documented anywhere.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content.","The endpoint's purpose (trades data?) is inferred solely from the URL path and cannot be verified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/8","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/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid x402 402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no documentation for the /api/v1/trades/8 endpoint specifically, no request or response schema, no examples, and the endpoint doesn't appear in the site's own API listing. The docs/pricing/API pages are empty beyond a wallet connect 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'0.02':10,28,100,149 '000':91 '0x8335':78 '20':90 '2913':79 '6':96 'Base network API' 'USDC micropayment API' 'accept':70 'access':6,24,68 'across':109 'actual':212 'advertis':85 'ai':119 'amount':88 'analysi':123 'analyt':113 'api':5,16,23,34,49,67,154,176,198 'appear':170 'avail':191,233 'base':8,26,57,81,92 'base-network' 'behind':214 'broader':104 'call':48 'cannot':229 'categori':111,177 'challeng':84 'classif':126 'collect':43 'commit':162 'confirm':231 'connect':204 'content':210 'contract':77 'convers':142 'data':112,116,226 'decim':97 'doc':195 'document':175,184 'embed':127 'endpoint':38,61,108,145,167,217 'equal':99 'estim':137 'exchang':132 'export':117 'feed':131 'financ':128 'four':110 'function':213 'gas':136 'gate':3,21,50 'generat':143 'geocod':140 'howev':163 'infrastructur':139 'insight':118 'json-response' 'key':17,35,155 'land':180 'learn':121 'limit':158 'list':64 'lowpaymentfee' 'lowpaymentfee.com':40,105 'machin':120 'materi':234 'max':87 'metric':114 'minimum':161 'name':221 'network':58 'no-api-key' 'offer':107 'page':181,199 'particular':216 'pay':9,27,46 'pay-per-cal':45 'pay-per-call API' 'pay-per-request' 'payment':74 'per':11,29,47,101,150 'platform':106 'post':71 'post-method' 'premium':4,22,66 'premium API' 'price':130,147,196 'prompt':206 'protocol':54 'provid':41 'quot':135 'rate':133,157 'relat':225 'render':201 'report':115 'request':12,30,72,102,151,185 'requir':18,36 'respons':188 'schema':186,189 'sentiment':122 'settl':73 'specif':60,165 'suggest':222 'summar':125 'text':124 'token':134 'trade':224 'trade-rel':223 'trades API' 'unclear':219 'unit':93 'usdc':14,32,76,95 'usdc-settlement' 'valid':141 'wallet':205 'web3':129 'x402':2,20,53,83 'x402 API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"fd29c506-1d6f-430d-8f10-4017a50a62fa","listingId":"6cd14a6f-7e1b-472a-ac00-9b273c99396f","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/8","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:58:01.629Z"}],"sources":[{"listingId":"6cd14a6f-7e1b-472a-ac00-9b273c99396f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/8","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:01.629Z","lastSeenAt":"2026-04-26T02:03:12.141Z"}],"details":{"listingId":"6cd14a6f-7e1b-472a-ac00-9b273c99396f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/8 \\\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 x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/trades/8"},{"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":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/8"}],"useCases":["Accessing trade-related data via a single micropayment per request","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go data retrieval settled on Base L2"],"bestFor":["AI agents needing keyless, on-demand API access","Developers who want to avoid subscription commitments","Crypto-native applications that can settle USDC on Base"],"notFor":["Users who need detailed API documentation 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":"2026-02-17T23:13:45.158Z"},"updatedAt":"2026-04-26T02:03:12.141Z"}}