I notice that to use kite.historical() API, I should subscribe seperately as it is provided as an addon. However, I am able to get historical data sometimes without subscription as well. But it gives "Invalid API credentials" 90% of the time.
Now that Im planning to use this API extensively, I wanted to know the reliability of this API as I remember reading in some thread that it is managed by a thirdparty vendor. Is it worth the subscription of another 2k. Or it works only 10% of the time even with subscription?