{"method":"POST","priceUsd":0.005,"network":"eip155:8453","description":"Fetch historical crypto OHLCV candle data from Coinbase Exchange for a trading pair. Returns timestamp, low, high, open, close and volume; supports 1m, 5m, 15m, 1h, 6h and 1d bars with at most 300 candles for charting, indicators and financial-data pipelines.","example":{"product_id":"BTC-USD","granularity":3600,"limit":48}}