{"id":"185cf4ba-eb8b-477f-a7f3-0f5c8b42cec1","shortId":"9XaSzp","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/42` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints use the x402 protocol for payment, settling in USDC on the Base network at $0.02 per request with no API keys, rate limits, or subscriptions required.\n\nThe specific endpoint probed (`/api/v1/trades/42`) is labeled \"Premium API Access\" and accepts POST requests. It returns JSON responses. The x402 challenge confirms it is live and requires a maximum of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The payment timeout is 300 seconds.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no examples of what data this particular trades endpoint returns. The endpoint appears to be a trade data resource (given the `/trades/42` path), but the exact payload structure is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["finance","data"],"synonyms":["trade data API","x402 API","USDC micropayment API","Base network API","pay-per-call API","crypto trade endpoint","lowpaymentfee"],"warnings":["No API documentation available — docs/pricing/README pages only show 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The specific data returned by /api/v1/trades/42 is undocumented and unclear","No examples or sample responses available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/42","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/42","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The purpose of the /trades/42 endpoint is unclear beyond its 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'/request':17,34 '/trades/42':201 '0.02':16,33,80,128 '000':123 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':138 '20':122 '300':145 '6':133 'Base network API' 'USDC micropayment API' 'accept':103 'access':101 'addit':167 'address':137 'ai/ml':58 'analyt':57 'api':54,85,100,153 'appear':192 'base':9,26,77,124,140 'base-network' 'call':4,21 'challeng':112 'collect':48 'confirm':113 'connect':162 'crypto trade endpoint' 'data':6,23,56,184,197 'decim':134 'detail':169 'doc':152 'document':147,178 'endpoint':7,24,36,65,94,188,191 'exact':205 'exampl':181 'extrem':149 'finance/web3':60 'given':199 'infer':59 'infrastructur':62 'json':108 'json-response' 'key':86 'label':98 'limit':88 'live':116 'lowpaymentfee' 'lowpaymentfee.com':43 'maximum':120 'network':78 'no-api-key' 'offer':46 'openapi':173 'page':157 'paid':135 'part':40 'particular':186 'path':202 'pay':2,19,51 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request':50 'payload':206 'payment':71,142 'per':3,20,52,81 'platform':44 'post':104 'post-method' 'premium':99 'price':154 'probe':95 'prompt':164 'protocol':69 'rate':87 'readm':156 'render':159 'request':53,82,105 'request/response':176 'requir':91,118 'resourc':198 'respons':109 'return':107,189 'schema':177 'second':146 'settl':12,29,72 'sinc':130 'span':55 'spars':150 'spec':174 'specif':93 'structur':207 'subscript':90 'technic':168 'timeout':143 'trade':5,22,187,196 'trade data API' 'unit':125 'unknown':209 'usd':129 'usdc':14,31,74,127,131 'usdc-settlement' 'use':66,132 'util':63 'via':10,27 'wallet':163 'x402':11,28,68,111 'x402 API' 'x402-payment'","prices":[{"id":"97cebdfb-2e99-417f-af86-ef94a932e6cc","listingId":"185cf4ba-eb8b-477f-a7f3-0f5c8b42cec1","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/42","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:46.763Z"}],"sources":[{"listingId":"185cf4ba-eb8b-477f-a7f3-0f5c8b42cec1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/42","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:46.763Z","lastSeenAt":"2026-04-26T05:32:45.888Z"}],"details":{"listingId":"185cf4ba-eb8b-477f-a7f3-0f5c8b42cec1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/42 \\\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":"Endpoint returns 402 with x402 challenge requiring 20000 base units USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/42"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/42"}],"useCases":["Fetching trade data without subscription commitments","Programmatic access to trade information with per-call USDC payment","Agent-driven data retrieval with x402 payment protocol"],"bestFor":["Developers wanting zero-commitment pay-per-use trade data","AI agents that can settle x402 payments on Base","Users who prefer no API key or account registration"],"notFor":["Users needing detailed API documentation or schemas before integrating","High-volume consumers who would benefit from bulk pricing","Anyone without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:45.854Z"},"updatedAt":"2026-04-26T05:32:45.888Z"}}