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fastapi.online — Klines (OHLCV Candlestick Data)
x402
fastapi.online — Klines (OHLCV Candlestick Data) is a paid API for AI agents from api.fastapi.online, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-12).
Returns OHLCV candlestick (kline) data for a given trading symbol and interval
Price / call$0.001
Success—
StatusUnknown
How this service works
Chat, embeddings, OCR, speech-to-text, image editing, image understanding (captioning/Q&A), text-to-speech, translation, writing tools, classification tools, developer tools, local utilities, format/checksum validators, encoding & crypto utilities, date/time calculators, geo/coordinate math, math & finance calculators, novelty tools, and business/social writing generators — 179 endpoints in all, across multiple specialized self-hosted models. Pay per call with crypto — no signup — or get an API key.
Output
Returns a series of OHLCV (Open, High, Low, Close, Volume) candlestick records for the requested symbol and interval, suitable for charting, technical analysis, or algorithmic trading strategies.
Example use cases
Crypto trading signal analysis
“Pull the last set of 15-minute klines for ETHUSDT so I can check whether there's a bullish crossover forming.”
Portfolio price tracking dashboard
“Get me the daily candlestick data for SOLUSDT so I can chart the open, high, low, and close prices over recent days.”
Automated trading bot data feed
“Fetch the 1-minute OHLCV kline data for BNBUSDT — I need it to feed into my trading algorithm for the next decision cycle.”
Technical details
Endpoint
POSThttps://api.fastapi.online/klines?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need raw OHLCV candlestick market data for a crypto trading pair, especially in a pay-per-call context with no signup required. Useful for agents doing technical analysis, backtesting signals, or powering trading dashboards without a persistent API subscription.
Side effects
- Invalid or unsupported symbol returns an error or empty response
- Unsupported interval string causes a validation error
- Payment not included or insufficient USDC results in 402 Payment Required
- Rate limiting or server unavailability may return 5xx errors
- Malformed request body (missing required fields) returns 400 Bad Request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| symbol | string | |
| interval | string |
Tags
x402
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