{"id":"bfae3497-ac4d-428a-aff1-4754a2f2e8df","shortId":"utg53x","kind":"x402","title":"OHLCV candlestick data for ANKR token, paid per-request via x402 on Base.","tagline":"OHLCV candlestick data for ANKR token, paid per-request via x402 on Base.","description":"This endpoint at lowpaymentfee.com provides OHLCV (Open, High, Low, Close, Volume) market data for the ANKR cryptocurrency token. 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\nEach request costs $0.02 in USDC (the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC, which has 6 decimals, equaling $0.02). Payment is made inline via the X-PAYMENT header — no API keys, accounts, or rate limits are required. The endpoint accepts POST requests and returns JSON.\n\nDocumentation beyond the landing page is extremely sparse. The /docs, /api, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of accepted parameters (e.g., time range, interval, pagination). The endpoint is confirmed live — it returns a well-formed x402 402 challenge — but the lack of documentation makes it difficult to know exactly what request body to send or what response shape to expect.","tags":[],"capabilities":["ohlcv-data","crypto-market-data","x402-payment","base-network","usdc-settlement","per-request-pricing","no-api-key"],"categories":["finance","crypto"],"synonyms":["ANKR candlestick data","ANKR OHLCV","crypto price history","ANKR market data","token OHLCV API","cryptocurrency candles"],"warnings":["No documentation available — /docs, /api, /pricing, and /README all return only a wallet-connect prompt with no content.","No OpenAPI or JSON schema describing request parameters or response format.","Request body structure and accepted query parameters (interval, date range, etc.) are unknown.","Response shape is entirely undocumented — example_request_json and example_response_json cannot be provided."],"endpointUrl":"https://lowpaymentfee.com/api/v1/crypto/ANKR/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/ANKR/ohlcv","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 x402 402 challenge, and pricing is clear ($0.02 USDC per request). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs. The exact parameters and response format must be 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'/docs':136 '/pricing':138 '/readme':140 '0.02':78,99 '000':89 '20':88 '402':184 '6':96 'ANKR OHLCV' 'ANKR candlestick data' 'ANKR market data' 'accept':121,165 'account':113 'advertis':84 'ankr':5,19,44 'api':58,111 'base':14,28,73,90 'base-network' 'behind':66 'beyond':128 'bodi':199 'broader':52 'candlestick':2,16 'challeng':83,185 'close':38 'confirm':175 'connect':146 'content':152 'cost':77 'crypto':57 'crypto price history' 'crypto-market-data' 'cryptocurr':45 'cryptocurrency candles' 'data':3,17,41 'decim':97 'descript':163 'difficult':193 'document':127,190 'e.g':167 'endpoint':30,120,173 'equal':98 'exact':196 'exampl':160 'expect':207 'extrem':133 'financ':55 'form':182 'gate':65 'header':109 'high':36 'inlin':103 'interv':170 'json':126 'key':112 'know':195 'lack':188 'land':130 'limit':116 'live':176 'low':37 'lowpaymentfee.com':32 'made':102 'make':191 'market':40 'maxamountrequir':86 'network':74 'no-api-key' 'offer':59 'ohlcv':1,15,34 'ohlcv-data' 'open':35 'openapi':156 'page':131,141 'pagin':171 'paid':7,21 'paramet':166 'part':49 'payment':69,100,108 'per':9,23 'per-request':8,22 'per-request-pricing' 'post':122 'prompt':148 'protocol':70 'provid':33,63 'rang':169 'rate':115 'request':10,24,76,123,198 'request/response':159 'requir':118 'respons':204 'return':125,143,178 'schema':157 'send':201 'shape':205 'spars':134 'substant':151 'suit':53 'time':168 'token':6,20,46 'token OHLCV API' 'unit':91 'usdc':80,93 'usdc-settlement' 'via':11,25,104 'volum':39 'wallet':147 'well':181 'well-form':180 'x':107 'x-payment':106 'x402':12,26,68,82,183 'x402-payment'","prices":[{"id":"1a287db7-f1d9-43e3-af3f-afc2e61f5093","listingId":"bfae3497-ac4d-428a-aff1-4754a2f2e8df","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/ANKR/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":"2026-04-18T18:35:23.446Z"}],"sources":[{"listingId":"bfae3497-ac4d-428a-aff1-4754a2f2e8df","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/crypto/ANKR/ohlcv","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:23.446Z","lastSeenAt":"2026-04-24T10:32:02.934Z"}],"details":{"listingId":"bfae3497-ac4d-428a-aff1-4754a2f2e8df","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/crypto/ANKR/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":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/crypto/ANKR/ohlcv"},{"claim":"All APIs on the platform cost $0.02 per request with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (6 decimals), so 20000 base units = $0.02.","source_url":"https://lowpaymentfee.com/api/v1/crypto/ANKR/ohlcv"}],"useCases":["Fetching historical OHLCV candlestick data for ANKR token","Building trading dashboards or charting tools that need ANKR price history","Backtesting trading strategies using ANKR price data","Programmatic agents purchasing crypto market data on-demand without API keys"],"bestFor":["Agents or apps needing pay-per-call ANKR market data with no signup","Developers who want to avoid API key management and subscriptions","x402-compatible clients on the Base network"],"notFor":["Users needing free or bulk historical data downloads","Applications requiring WebSocket streaming or real-time tick data","Users who need comprehensive documentation or guaranteed SLA"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.817Z"},"updatedAt":"2026-04-24T10:32:02.934Z"}}