{"id":"c86bd97a-e4c5-4ec4-9792-e736a8a6d828","shortId":"4fbMB8","kind":"x402","title":"OHLCV candlestick data for ZRX (0x Protocol) via pay-per-call x402 on Base.","tagline":"OHLCV candlestick data for ZRX (0x Protocol) via pay-per-call x402 on Base.","description":"This endpoint provides OHLCV (Open, High, Low, Close, Volume) market data for the ZRX (0x Protocol) token. It is part of a broader suite of crypto and finance APIs hosted at lowpaymentfee.com, all accessible via the x402 payment protocol on the Base network. Each request costs $0.02 in USDC, with no API keys, rate limits, or subscriptions required — callers simply attach an x402 payment header to each POST request.\n\nThe endpoint is live and returns a standard x402 challenge (HTTP 402) when called without payment. Settlement occurs on Base using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The provider advertises a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02 per request. The x402 version is 1, with a payment timeout of 300 seconds.\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 the same $0.02 price point. However, no detailed API documentation, request/response schemas, or usage examples are available from the crawled pages — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. The exact request body format and response schema for the OHLCV endpoint must be inferred or discovered experimentally.","tags":[],"capabilities":["ohlcv-data","crypto-market-data","zrx-token","x402-payment","base-network","usdc-settlement","pay-per-call"],"categories":["finance","crypto"],"synonyms":["ZRX OHLCV","0x Protocol candlestick data","ZRX price history","crypto OHLCV API","ZRX market data","token candlestick chart data"],"warnings":["No API documentation available — docs, pricing, and README pages all render only a wallet-connect prompt with no content.","Request body schema and response format for the OHLCV endpoint are unknown; callers must discover experimentally.","The provider hosts many endpoints at the same domain; quality and reliability of individual endpoints is unverified.","No OpenAPI spec or output schema beyond the basic x402 challenge metadata."],"endpointUrl":"https://lowpaymentfee.com/api/v1/crypto/ZRX/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/ZRX/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 captured) and pricing is clear ($0.02 USDC on Base), but there is no API documentation, no request/response schema, and no examples. The docs pages are empty. The request body format and response structure are entirely 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'000':131 '0x':6,21,45 '0x Protocol candlestick data' '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':123 '1':146 '20':130 '300':152 '402':111 '6':136 'ZRX OHLCV' 'ZRX market data' 'ZRX price history' 'access':64 'across':166 'advertis':126 'ai/ml':168 'api':59,82,183,198 'attach':91 'avail':191 'base':15,30,72,119,132 'base-network' 'bodi':217 'broader':53 'call':12,27,113 'caller':89 'candlestick':2,17 'categori':172 'challeng':109 'close':38 'connect':207 'content':213 'contract':122 'cost':76 'crawl':194 'crypto':56 'crypto OHLCV API' 'crypto-market-data' 'data':3,18,41 'data/analytics':167 'decim':137 'detail':182 'discov':230 'doc':197 'document':154,184 'endpoint':32,101,165,225 'equal':138 'exact':215 'exampl':189 'experiment':231 'extrem':156 'financ':58 'finance/web3':169 'format':218 'header':95 'high':36 'host':60 'howev':180 'http':110 'infer':228 'infrastructur':171 'key':83 'land':161 'limit':85 'list':163 'live':103 'low':37 'lowpaymentfee.com':62 'mani':164 'market':40 'maxamountrequir':128 'must':226 'network':73 'occur':117 'ohlcv':1,16,34,224 'ohlcv-data' 'open':35 'page':162,195,202 'part':50 'pay':10,25 'pay-per-cal':9,24 'pay-per-call' 'payment':68,94,115,149 'per':11,26,140 'point':179 'post':98 'price':178,199 'prompt':209 'protocol':7,22,46,69 'provid':33,125,159 'rate':84 'readm':201 'render':204 'request':75,99,141,216 'request/response':185 'requir':88 'respons':220 'return':105 'schema':186,221 'second':153 'settlement':116 'simpli':90 'spars':157 'standard':107 'subscript':87 'substant':212 'suit':54 'timeout':150 'token':47 'token candlestick chart data' 'unit':133 'usag':188 'usdc':79,121 'usdc-settlement' 'use':120 'version':144 'via':8,23,65 'volum':39 'wallet':208 'without':114 'x402':13,28,67,93,108,143 'x402-payment' 'zrx':5,20,44 'zrx-token'","prices":[{"id":"48d6d241-0a19-4dcf-83a2-4e0adad35706","listingId":"c86bd97a-e4c5-4ec4-9792-e736a8a6d828","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/ZRX/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":"2026-04-18T18:32:31.517Z"}],"sources":[{"listingId":"c86bd97a-e4c5-4ec4-9792-e736a8a6d828","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/crypto/ZRX/ohlcv","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:31.517Z","lastSeenAt":"2026-04-24T20:01:56.621Z"}],"details":{"listingId":"c86bd97a-e4c5-4ec4-9792-e736a8a6d828","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/crypto/ZRX/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 HTTP 402 with x402 version 1 challenge requiring USDC payment on Base","source_url":"https://lowpaymentfee.com/api/v1/crypto/ZRX/ohlcv"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per request","source_url":"https://lowpaymentfee.com/api/v1/crypto/ZRX/ohlcv"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/crypto/ZRX/ohlcv"},{"claim":"Provider advertises $0.02/request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages contain no substantive documentation","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching historical OHLCV candlestick data for ZRX to build trading charts","Backtesting trading strategies using ZRX price and volume history","Integrating ZRX market data into portfolio dashboards or bots","Agent-driven crypto analytics pipelines that pay per request"],"bestFor":["Developers needing quick, keyless access to ZRX OHLCV data","AI agents that can settle micropayments on Base via x402","Projects that want pay-per-use crypto data without subscriptions"],"notFor":["Users needing free or bulk historical data downloads","Applications requiring real-time streaming/websocket price feeds","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:59.41Z"},"updatedAt":"2026-04-24T20:01:56.621Z"}}