{"id":"243f29de-ab7b-45ab-b442-fee50015a954","shortId":"u4cCRs","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol, settling on the Base network in USDC. The specific endpoint `/api/v1/trades/92` appears to be part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made in USDC (contract 0x8335…2913 on Base) with a max amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nHowever, the specific functionality of `/api/v1/trades/92` is unclear. The endpoint path suggests it may return or process data related to a specific trade (ID 92), but no documentation, request schema, or response schema is available. The broader site lists categories like \"Finance & Web3\" with price feeds, exchange rates, token quotes, and gas estimates, so this trade endpoint likely falls within that financial data domain. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content, so detailed documentation is absent.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","http-post","financial-data"],"categories":["finance","data"],"synonyms":["trade data API","x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","crypto trade endpoint","web3 API"],"warnings":["No documentation available — docs, pricing, and API pages all render only 'Connect wallet' with no content.","The specific functionality of /api/v1/trades/92 is unknown; no request or response schema is provided.","The endpoint path references a hardcoded trade ID (92), which may indicate a single-resource endpoint rather than a general-purpose API.","No OpenAPI spec, ai-plugin manifest, or agents.txt discovered."],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/92","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/92","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 ($0.02 USDC on Base). However, there is no documentation for this specific endpoint, no request/response schema, and the docs pages are empty. The purpose of /api/v1/trades/92 is only inferrable from the URL 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'0.02':10,24,82,118 '000':113 '0x8335':103 '20':112 '2913':104 '6':121 '92':173 'Base network API' 'USDC micropayment API' 'absent':234 'accept':94 'access':6,20,36,134 'advertis':125 'ai/ml':72 'amount':110 'analyt':71 'api':5,19,35,68,127,217 'appear':53 'attach':137 'avail':183 'base':8,22,45,106,114 'base-network' 'broader':59,185 'call':67 'caller':135 'categori':188 'challeng':87 'confirm':88 'connect':223 'content':229 'contract':102 'crypto trade endpoint' 'data':70,75,166,211 'decim':122 'detail':231 'doc':214 'document':176,232 'domain':212 'dozen':62 'endpoint':30,51,90,158,205 'equal':117 'estim':201 'exchang':195 'fall':207 'feed':194 'financ':190 'finance/web3':74 'financi':210 'financial-data' 'function':152 'gas':200 'gate':3,17 'header':142 'howev':149 'http-post' 'id':172 'infer':73 'infrastructur':77 'instant':133 'key':128 'like':189,206 'limit':131 'list':187 'live':92 'lowpaymentfee' 'lowpaymentfee.com':32 'made':99 'max':109 'may':162 'network':46 'no-api-key' 'offer':61 'page':218 'part':56 'path':159 'pay':9,23,65 'pay-per-cal':64 'pay-per-call API' 'pay-per-request' 'payment':40,97,141,147 'per':11,25,66,83 'platform':60,124 'post':95 'premium':4,18,34 'price':80,193,215 'process':165 'prompt':225 'proof':148 'protocol':41 'provid':33 'quot':198 'rate':130,196 'relat':167 'render':220 'request':12,26,84,96,177 'respons':180 'return':163 'schema':178,181 'settl':42 'simpli':136 'site':186 'span':69 'specif':50,151,170 'suggest':160 'token':197 'trade':171,204 'trade data API' 'unclear':156 'unit':115 'usdc':14,28,48,101,119 'usdc-settlement' 'use':120 'util':78 'valid':145 'via':37 'wallet':224 'web3':191 'web3 API' 'within':208 'x':140 'x-payment':139 'x402':2,16,39,86,146 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"98b20e0f-9e0c-4a3f-9139-a06343511171","listingId":"243f29de-ab7b-45ab-b442-fee50015a954","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/92","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:58:11.286Z"}],"sources":[{"listingId":"243f29de-ab7b-45ab-b442-fee50015a954","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/92","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:11.286Z","lastSeenAt":"2026-04-26T01:02:58.540Z"}],"details":{"listingId":"243f29de-ab7b-45ab-b442-fee50015a954","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/92 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\"","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 network","source_url":"https://lowpaymentfee.com/api/v1/trades/92"},{"claim":"The platform advertises $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/92"},{"claim":"The site lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching trade-related data on a per-request payment basis without needing an API key","Integrating low-cost financial data into agent workflows using x402 micropayments","Programmatic access to trade information settled in USDC on Base"],"bestFor":["AI agents needing keyless, pay-per-call access to financial data","Developers experimenting with x402 payment protocol integrations","Low-volume consumers who want no subscription or commitment"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-financial/non-trade data from this specific endpoint"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:44.723Z"},"updatedAt":"2026-04-26T01:02:58.540Z"}}