{"id":"695f0bac-de91-474d-95d5-132dd307e062","shortId":"VwcFKu","kind":"x402","title":"OHLCV candlestick data for API3 token, paid per-request via x402 on Base.","tagline":"OHLCV candlestick data for API3 token, paid per-request via x402 on Base.","description":"This endpoint provides OHLCV (Open, High, Low, Close, Volume) candlestick data for the API3 cryptocurrency token. It is hosted on lowpaymentfee.com, a platform offering a variety of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints on the platform use the x402 payment protocol, settling in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/crypto/API3/ohlcv` accepts POST requests and returns JSON. The x402 challenge confirms the endpoint is live, advertising a maximum cost of $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — payment is handled entirely through the x402 `X-PAYMENT` header. The platform advertises instant access with no minimums or commitments.\n\nDocumentation is extremely 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 accepted parameters (e.g., time range, interval, exchange). The endpoint path suggests it returns OHLCV data specifically for the API3 token, but the exact request format and response structure are unknown.","tags":[],"capabilities":["ohlcv-data","crypto-market-data","api3-token","x402-payment","usdc-base-network","per-request-billing","no-api-key"],"categories":["finance","crypto"],"synonyms":["API3 candlestick data","API3 OHLCV","crypto price history","API3 market data","token candlestick chart","API3 price candles","cryptocurrency OHLCV"],"warnings":["No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or JSON schema provided for request or response","Request parameters (time range, interval, exchange, etc.) are completely undocumented","Response format is unknown — no example responses available","Cannot verify what data source backs the OHLCV data"],"endpointUrl":"https://lowpaymentfee.com/api/v1/crypto/API3/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/API3/ohlcv","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge confirms the endpoint is live and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages return only a wallet-connect prompt. The actual request parameters and response format are entirely unknown, making this effectively a stub 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'0.02':113 '000':117 '20':116 '6':123 'API3 OHLCV' 'API3 candlestick data' 'API3 market data' 'API3 price candles' 'accept':94,189 'access':148 'addit':174 'advertis':108,146 'ai/ml':65 'analyt':64 'api':60,126,160 'api3':5,19,42,207 'api3-token' 'base':14,28,87,118 'call':59 'candlestick':2,16,38 'challeng':102 'close':36 'commit':153 'confirm':103 'connect':169 'cost':111 'crypto':68 'crypto price history' 'crypto-market-data' 'cryptocurr':43 'cryptocurrency OHLCV' 'data':3,17,39,63,203 'decim':124 'descript':187 'detail':176 'doc':159 'document':154 'e.g':191 'endpoint':30,61,73,91,105,197 'entir':136 'exact':211 'exampl':184 'exchang':195 'extrem':156 'financ':67 'format':213 'handl':135 'header':143 'high':34 'host':47 'infer':66 'instant':147 'interv':194 'json':99 'key':127 'limit':130 'live':107 'low':35 'lowpaymentfee.com':49 'maximum':110 'minimum':151 'network':88 'no-api-key' 'offer':52 'ohlcv':1,15,32,202 'ohlcv-data' 'open':33 'openapi':180 'page':164 'paid':7,21 'paramet':190 'path':198 'pay':57 'pay-per-cal':56 'payment':80,133,142 'per':9,23,58,114 'per-request':8,22 'per-request-billing' 'platform':51,76,145 'post':95 'price':161 'prompt':171 'protocol':81 'provid':31 'rang':193 'rate':129 'readm':163 'render':166 'request':10,24,96,115,212 'request/response':183 'requir':132 'respons':215 'return':98,201 'schema':181 'servic':71 'settl':82 'span':62 'spars':157 'specif':90,204 'structur':216 'suggest':199 'technic':175 'time':192 'token':6,20,44,208 'token candlestick chart' 'unit':119 'unknown':218 'usdc':84,121 'usdc-base-network' 'use':77 'util':70 'varieti':54 'via':11,25 'volum':37 'wallet':170 'x':141 'x-payment':140 'x402':12,26,79,101,139 'x402-payment'","prices":[{"id":"16c9a139-c79a-4ad3-af37-cce4da03d298","listingId":"695f0bac-de91-474d-95d5-132dd307e062","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/API3/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":"2026-04-18T18:34:56.320Z"}],"sources":[{"listingId":"695f0bac-de91-474d-95d5-132dd307e062","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/crypto/API3/ohlcv","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:56.320Z","lastSeenAt":"2026-04-24T12:02:46.950Z"}],"details":{"listingId":"695f0bac-de91-474d-95d5-132dd307e062","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/crypto/API3/ohlcv \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge advertising USDC payment on Base network with maxAmountRequired of 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/crypto/API3/ohlcv"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across data analytics, AI/ML, finance/crypto, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (docs, api, pricing, README) render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching historical OHLCV candlestick data for the API3 token","Building trading dashboards or charting tools that include API3","Programmatic analysis of API3 price movements over time","Agent-driven crypto market research without API key management"],"bestFor":["Developers needing quick, keyless access to API3 OHLCV data","AI agents that can settle micropayments via x402 on Base","Projects that want pay-per-call pricing with no subscription overhead"],"notFor":["Users needing OHLCV data for tokens other than API3 (different endpoints exist per token)","High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need detailed API documentation or schema validation before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:52.157Z"},"updatedAt":"2026-04-24T12:02:46.950Z"}}