{"id":"42cb773e-1094-4619-ae76-8179fb987e49","shortId":"hcSVBy","kind":"x402","title":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific path `/api/v1/trades/185` suggests a finance/trading-related data endpoint, though the exact response payload is not documented. The provider operates a broader platform offering Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utility APIs, all priced at $0.02 per request.\n\nPayment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge confirms the endpoint is live and accepts POST requests with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). No API keys or rate limits are required — access is granted purely through per-request micropayment. The timeout for payment settlement is 300 seconds.\n\nDocumentation is extremely sparse. The crawled docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no example request/response bodies, and no description of what the `/api/v1/trades/185` endpoint actually returns. The endpoint appears to be part of a trading or market data category based on the URL path structure, but this is inference only.","tags":[],"capabilities":["x402-payment","per-request-micropayment","base-network","usdc-settlement","no-api-key","post-method"],"categories":["finance","data"],"synonyms":["trades API","market data","x402 micropayment API","pay-per-call API","Base USDC API","lowpaymentfee","crypto trades endpoint"],"warnings":["No OpenAPI or schema documentation available","Exact response format for /api/v1/trades/185 is unknown","Docs, pricing, and API pages all render only 'Connect wallet' with no technical content","The specific resource (trades/185) purpose is inferred from URL path only"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/185","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/185","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing and network details, but there is no documentation, no request/response schema, and no explanation of what the trades/185 endpoint actually returns. Effectively a stub 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'/request':16,34 '0.02':15,33,88,124 '000':120 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':101 '20':119 '300':153 '6':128 'Base USDC API' 'accept':111 'access':7,25,44,138 'actual':195 'ai':76 'amount':117 'analyt':75 'api':6,24,43,84,131,164 'appear':199 'base':9,27,96,121,210 'base-network' 'bodi':186 'broader':71 'call':4,22 'categori':209 'challeng':104 'confirm':105 'connect':170 'contract':100 'crawl':160 'crypto trades endpoint' 'data':57,74,208 'decim':129 'descript':189 'detail':177 'doc':161 'document':66,155 'endpoint':38,58,107,194,198 'exact':61 'exampl':184 'extrem':157 'financ':79 'finance/trading-related':56 'given':125 'grant':140 'i.e':123 'infer':219 'infrastructur':82 'key':132 'learn':78 'limit':135 'live':109 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':77 'market':207 'market data' 'maximum':116 'micropay':146 'network':10,28,97 'no-api-key' 'offer':73 'openapi':181 'oper':69 'page':165 'part':202 'path':52,214 'pay':2,20 'pay-per-cal':1,19 'pay-per-call API' 'payload':63 'payment':48,91,150 'per':3,21,89,144 'per-request':143 'per-request-micropayment' 'platform':72 'post':112 'post-method' 'premium':5,23,42 'price':86,162 'prompt':172 'protocol':13,31,49 'provid':41,68 'pure':141 'rate':134 'render':167 'request':90,113,145 'request/response':185 'requir':137 'respons':62 'return':196 'schema':182 'second':154 'settl':93 'settlement':151 'spars':158 'specif':51 'structur':215 'suggest':54 'technic':176 'though':59 'timeout':148 'trade':205 'trades API' 'unit':122 'url':213 'usdc':18,36,99,126 'usdc-settlement' 'use':98 'util':83 'via':11,29,45 'wallet':171 'web3':80 'x402':12,30,47,103 'x402 micropayment API' 'x402-payment'","prices":[{"id":"1072d202-d1fc-45e0-8db8-63e3a6c8a6cf","listingId":"42cb773e-1094-4619-ae76-8179fb987e49","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/185","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:53.925Z"}],"sources":[{"listingId":"42cb773e-1094-4619-ae76-8179fb987e49","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/185","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:53.925Z","lastSeenAt":"2026-04-26T04:03:40.975Z"}],"details":{"listingId":"42cb773e-1094-4619-ae76-8179fb987e49","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/185 \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge accepting USDC on Base network, maxAmountRequired 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/trades/185"},{"claim":"Platform pricing is $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/185"}],"useCases":["Fetching trade or market data with per-request payment and no subscription","Integrating pay-as-you-go financial data into autonomous agents","Accessing premium trading information without API key management"],"bestFor":["Agents needing on-demand trade/market data without signup","Developers testing x402 payment flows on Base","Low-volume consumers who prefer per-call pricing over subscriptions"],"notFor":["High-volume consumers needing bulk pricing or batch endpoints","Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:45.518Z"},"updatedAt":"2026-04-26T04:03:40.975Z"}}