{"id":"5846aef2-b826-4230-99e5-8dfca75849d3","shortId":"zEqR4w","kind":"x402","title":"OHLCV candlestick data for UNI token, paid per-request via x402 on Base.","tagline":"OHLCV candlestick data for UNI token, paid per-request via x402 on Base.","description":"This endpoint provides OHLCV (Open, High, Low, Close, Volume) market data for the Uniswap (UNI) token. It is part of the lowpaymentfee.com platform, which offers a suite of data, AI, finance, and utility APIs all priced at $0.02 per request with no API keys, no rate limits, and instant access.\n\nPayment is handled via the x402 protocol on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The maximum amount required per call is 20,000 base units, which equals $0.02 USD (USDC uses 6 decimals). The endpoint accepts POST requests and returns JSON. No authentication or API key is needed — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nDocumentation beyond the landing page is sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no request/response examples, and no description of the OHLCV payload format. The endpoint is confirmed live (returns a proper 402 challenge), but the exact request parameters (e.g., time range, interval) and response schema must be inferred or discovered experimentally.","tags":[],"capabilities":["ohlcv-data","crypto-market-data","uni-token","x402-payment","base-network","usdc-settlement","per-request-pricing","no-api-key"],"categories":["finance","crypto"],"synonyms":["UNI candlestick data","Uniswap OHLCV","crypto OHLCV API","UNI price history","token candlestick chart data","UNI market data"],"warnings":["No OpenAPI or request/response schema available — request parameters and response format are unknown","All documentation pages (docs, API, pricing, README) return only a 'Connect wallet' prompt with no technical content","OHLCV payload structure (supported intervals, time ranges, field names) must be discovered experimentally"],"endpointUrl":"https://lowpaymentfee.com/api/v1/crypto/UNI/ohlcv","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/crypto/UNI/ohlcv","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI schema, no documented request parameters, no response examples, and all doc pages render only a wallet-connect prompt. The listing is essentially a stub with confirmed 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'000':102 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':93 '20':101 '402':192 '6':111 'UNI candlestick data' 'UNI market data' 'UNI price history' 'Uniswap OHLCV' 'accept':115 'access':78 'addit':165 'ai':58 'amount':96 'api':62,71,124,151 'attach':130 'authent':122 'base':14,28,88,103 'base-network' 'beyond':143 'call':99 'caller':128 'candlestick':2,16 'challeng':193 'close':36 'confirm':187 'connect':160 'contract':92 'crypto OHLCV API' 'crypto-market-data' 'data':3,17,39,57 'decim':112 'descript':178 'detail':167 'discov':210 'doc':150 'document':142 'e.g':199 'endpoint':30,114,185 'equal':106 'exact':196 'exampl':175 'experiment':211 'financ':59 'format':183 'handl':81 'header':135 'high':34 'infer':208 'instant':77 'interv':202 'json':120 'key':72,125 'land':145 'limit':75 'live':188 'low':35 'lowpaymentfee.com':50 'market':38 'maximum':95 'must':206 'need':127 'network':89 'no-api-key' 'offer':53 'ohlcv':1,15,32,181 'ohlcv-data' 'open':33 'openapi':171 'page':146,155 'paid':7,21 'paramet':198 'part':47 'payload':182 'payment':79,134,140 'per':9,23,67,98 'per-request':8,22 'per-request-pricing' 'platform':51 'post':116 'price':64,152 'prompt':162 'proof':141 'proper':191 'protocol':85 'provid':31 'rang':201 'rate':74 'readm':154 'render':157 'request':10,24,68,117,197 'request/response':174 'requir':97 'respons':204 'return':119,189 'schema':172,205 'simpli':129 'spars':148 'suit':55 'technic':166 'time':200 'token':6,20,44 'token candlestick chart data' 'uni':5,19,43 'uni-token' 'uniswap':42 'unit':104 'usd':108 'usdc':91,109 'usdc-settlement' 'use':90,110 'util':61 'valid':138 'via':11,25,82 'volum':37 'wallet':161 'x':133 'x-payment':132 'x402':12,26,84,139 'x402-payment'","prices":[{"id":"d61d50fb-c140-41fd-a8b6-4a7a80d7bfcc","listingId":"5846aef2-b826-4230-99e5-8dfca75849d3","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/crypto/UNI/ohlcv","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:30.909Z"}],"sources":[{"listingId":"5846aef2-b826-4230-99e5-8dfca75849d3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/crypto/UNI/ohlcv","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:30.909Z","lastSeenAt":"2026-04-24T20:01:56.611Z"}],"details":{"listingId":"5846aef2-b826-4230-99e5-8dfca75849d3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/crypto/UNI/ohlcv \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -d '{}'","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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/crypto/UNI/ohlcv"},{"claim":"All APIs on the platform 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":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/crypto/UNI/ohlcv"}],"useCases":["Fetching historical OHLCV candlestick data for UNI to build trading charts","Backtesting trading strategies using UNI price and volume data","Feeding UNI market data into automated trading bots or analytics pipelines"],"bestFor":["Agents or bots that need on-demand UNI market data without managing API keys","Developers building crypto dashboards who want simple per-call pricing","x402-native applications on Base that need token price feeds"],"notFor":["High-frequency trading requiring sub-second latency and guaranteed SLAs","Users who need OHLCV data for hundreds of tokens in a single call (this endpoint is UNI-specific)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:59.429Z"},"updatedAt":"2026-04-24T20:01:56.611Z"}}