{"id":"4ba410b2-b031-4324-9206-1ff3ebfcfcb1","shortId":"APg9na","kind":"x402","title":"USDT OHLCV candlestick data via x402 micropayment on Base, $0.02 per request.","tagline":"USDT OHLCV candlestick data via x402 micropayment on Base, $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides OHLCV (Open, High, Low, Close, Volume) candlestick data for the USDT cryptocurrency pair. It is part of a broader suite of finance and crypto APIs offered by the same provider, all gated behind the x402 payment protocol on the Base network.\n\nThe endpoint accepts POST requests and is paid per-call using USDC on Base. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (which has 6 decimals), equating to $0.02 per request. No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The payment settles to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 using the USDC contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.\n\nDocumentation is extremely sparse. The provider's landing page lists many endpoints across data/analytics, AI/ML, finance/web3, and infrastructure categories, all at $0.02 per request. However, no request body schema, response schema, or usage examples are documented for any endpoint. The specific parameters accepted by the OHLCV endpoint (e.g., time range, interval, trading pair) are unknown from the available material. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content.","tags":[],"capabilities":["crypto-ohlcv","usdt-market-data","x402-payment","base-network","usdc-settlement","per-request-pricing"],"categories":["finance","crypto"],"synonyms":["USDT candlestick data","USDT OHLCV API","crypto price history","USDT open high low close volume","cryptocurrency market data","tether historical data"],"warnings":["No request body schema documented — required parameters for OHLCV queries are unknown","No response schema or example responses available","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content","The specific trading pair, time intervals, and other query parameters are not documented anywhere in the crawl material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/crypto/USDT/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/USDT/ohlcv","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no documented request schema, response schema, or usage examples. The docs pages are empty beyond a wallet-connect prompt. The actual parameters and response format for the OHLCV endpoint are entirely 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'000':94 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':135 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':141 '20':93 '6':101 'USDT OHLCV API' 'USDT candlestick data' 'USDT open high low close volume' 'accept':73,186 'across':156 'addit':219 'address':134 'advertis':89 'ai/ml':158 'api':54,109,205 'attach':118 'avail':201 'base':9,21,69,85,95,143 'base-network' 'behind':62 'bodi':171 'broader':48 'call':81 'caller':116 'candlestick':3,15,36 'categori':162 'challeng':88 'close':34 'connect':214 'content':220 'contract':139 'crypto':53 'crypto price history' 'crypto-ohlcv' 'cryptocurr':41 'cryptocurrency market data' 'data':4,16,37 'data/analytics':157 'decim':102 'doc':204 'document':144,179 'e.g':191 'endpoint':26,72,155,182,190 'equat':103 'exampl':177 'extrem':146 'financ':51 'finance/web3':159 'gate':61 'header':123 'high':32 'howev':168 'infrastructur':161 'interv':194 'key':110 'land':151 'limit':113 'list':153 'low':33 'lowpaymentfee.com':28 'mani':154 'materi':202 'maxamountrequir':91 'micropay':7,19 'network':70 'offer':55 'ohlcv':2,14,30,189 'open':31 'page':152,209 'paid':78 'pair':42,196 'paramet':185 'part':45 'payment':65,122,128,131 'per':11,23,80,106,166 'per-cal':79 'per-request-pricing' 'post':74 'price':206 'prompt':216 'proof':129 'protocol':66 'provid':29,59,149 'rang':193 'rate':112 'readm':208 'render':211 'request':12,24,75,107,167,170 'requir':115 'respons':173 'schema':172,174 'settl':132 'simpli':117 'spars':147 'specif':184 'suit':49 'tether historical data' 'time':192 'trade':195 'unit':96 'unknown':198 'usag':176 'usdc':83,98,138 'usdc-settlement' 'usdt':1,13,40 'usdt-market-data' 'use':82,136 'valid':126 'via':5,17 'volum':35 'wallet':215 'x':121 'x-payment':120 'x402':6,18,64,87,127 'x402-payment'","prices":[{"id":"2a461a63-84f0-4382-928f-5d4ad2c84f94","listingId":"4ba410b2-b031-4324-9206-1ff3ebfcfcb1","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/USDT/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":"2026-04-18T18:34:51.574Z"}],"sources":[{"listingId":"4ba410b2-b031-4324-9206-1ff3ebfcfcb1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/crypto/USDT/ohlcv","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:51.574Z","lastSeenAt":"2026-04-23T20:01:33.446Z"}],"details":{"listingId":"4ba410b2-b031-4324-9206-1ff3ebfcfcb1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/crypto/USDT/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 x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/crypto/USDT/ohlcv"},{"claim":"USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/crypto/USDT/ohlcv"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"Provider lists finance/crypto endpoints including token quotes, gas estimates, price feeds, and exchange rates","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching USDT OHLCV candlestick data for trading bots or analytics dashboards","Programmatic access to USDT price history without API key management","Agent-driven crypto market analysis with per-call micropayments"],"bestFor":["Agents or bots that need on-demand USDT price candle data","Developers wanting keyless, pay-per-use crypto market data","x402-compatible clients on the Base network"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users needing comprehensive multi-asset OHLCV data with well-documented schemas","Anyone without USDC on Base or an x402-compatible payment client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:18:57.65Z"},"updatedAt":"2026-04-23T20:01:33.446Z"}}