{"id":"ed57b329-f4b2-4122-8d3a-a1f1c77faa96","shortId":"RzJzYC","kind":"x402","title":"Pay-per-call OHLCV candlestick data for Cardano (ADA) via x402 on Base.","tagline":"Pay-per-call OHLCV candlestick data for Cardano (ADA) via x402 on Base.","description":"This endpoint provides OHLCV (Open, High, Low, Close, Volume) candlestick data for Cardano (ADA). 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). Each request costs a maximum of 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). The endpoint accepts POST requests and returns JSON. No authentication beyond the x402 payment header is required.\n\nThe broader lowpaymentfee.com platform also exposes endpoints for analytics, AI inference (sentiment, summarization, classification, embeddings), exchange rates, gas estimates, geocoding, and more — all at the same $0.02 per-call price point. Documentation pages exist but were largely empty at crawl time, so request/response schemas for this specific OHLCV endpoint are not documented.","tags":[],"capabilities":["ohlcv-candlestick-data","cardano-ada","crypto-market-data","x402-payment","usdc-base-network","pay-per-request","no-api-key"],"categories":["finance","crypto"],"synonyms":["ADA OHLCV","Cardano candlestick data","ADA price history","crypto OHLCV API","Cardano market data","ADA candles","cryptocurrency historical prices"],"warnings":["No request or response schema documented — input parameters (timeframe, date range, etc.) are unknown","Documentation pages (/docs, /api, /pricing, /README) returned no meaningful content at crawl time","The endpoint description is generic ('Premium API Access') and does not describe the OHLCV data specifically","Cannot verify what data source backs the ADA OHLCV data or its freshness/accuracy"],"endpointUrl":"https://lowpaymentfee.com/api/v1/crypto/ADA/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/ADA/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 (402 challenge confirmed) and pricing is clear ($0.02 per call in USDC on Base). However, there is no documented request/response schema, no examples, and the docs pages returned only 'Connect wallet' with no content. The specific OHLCV endpoint's input parameters and output format are entirely 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'000':99 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':91 '20':98 '6':109 'ADA OHLCV' 'ADA candles' 'ADA price history' 'Cardano candlestick data' 'Cardano market data' 'accept':113 'access':76 'ada':10,24,42 'ai':56,137 'also':132 'analyt':136 'api':60,69 'authent':120 'base':14,28,86,100 'beyond':121 'broader':129 'call':4,18,157 'candlestick':6,20,38 'cardano':9,23,41 'cardano-ada' 'classif':141 'close':36 'contract':90 'cost':94 'crawl':168 'crypto OHLCV API' 'crypto-market-data' 'cryptocurrency historical prices' 'data':7,21,39,55 'decim':110 'document':160,180 'embed':142 'empti':166 'endpoint':30,112,134,177 'equal':105 'estim':146 'exchang':143 'exist':162 'expos':133 'financ':57 'gas':145 'geocod':147 'handl':79 'header':125 'high':34 'infer':138 'instant':75 'json':118 'key':70 'larg':165 'limit':73 'low':35 'lowpaymentfee.com':48,130 'maximum':96 'network':87 'no-api-key' 'offer':51 'ohlcv':5,19,32,176 'ohlcv-candlestick-data' 'open':33 'page':161 'part':45 'pay':2,16 'pay-per-cal':1,15 'pay-per-request' 'payment':77,124 'per':3,17,65,156 'per-cal':155 'platform':49,131 'point':159 'post':114 'price':62,158 'protocol':83 'provid':31 'rate':72,144 'request':66,93,115 'request/response':171 'requir':127 'return':117 'schema':172 'sentiment':139 'specif':175 'suit':53 'summar':140 'time':169 'unit':101 'usdc':89,103,107 'usdc-base-network' 'use':88,108 'util':59 'via':11,25,80 'volum':37 'x402':12,26,82,123 'x402-payment'","prices":[{"id":"b5c37b51-d3e6-4a3a-ba05-0a549fcf7c16","listingId":"ed57b329-f4b2-4122-8d3a-a1f1c77faa96","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/ADA/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":"2026-04-18T18:36:26.992Z"}],"sources":[{"listingId":"ed57b329-f4b2-4122-8d3a-a1f1c77faa96","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/crypto/ADA/ohlcv","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:26.992Z","lastSeenAt":"2026-04-24T09:03:03.791Z"}],"details":{"listingId":"ed57b329-f4b2-4122-8d3a-a1f1c77faa96","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/crypto/ADA/ohlcv \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge advertising USDC on Base network, maxAmountRequired 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/crypto/ADA/ohlcv"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/crypto/ADA/ohlcv"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching historical OHLCV candlestick data for Cardano (ADA) for charting or backtesting","Building trading bots that need ADA price and volume data on demand","Integrating ADA market data into dashboards or analytics pipelines"],"bestFor":["Agents or apps needing on-demand ADA OHLCV data without managing API keys","Low-volume or sporadic crypto data queries where pay-per-call is cost-effective","x402-native workflows that settle micropayments in USDC on Base"],"notFor":["High-frequency trading requiring sub-second latency and bulk historical downloads","Users who need free or subscription-based unlimited access to crypto data"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:47.798Z"},"updatedAt":"2026-04-24T09:03:03.791Z"}}