Best Trading APIs in India for Algo & Live Market Data (2025)

chethan

I’m planning to build my own trading dashboard and semi-auto strategies. Looking for reliable Indian trading APIs that give live prices, historical candles, and order placement.
Not interested in paper trading only — real execution matters.

APIs I checked so far:

Zerodha Kite Connect

Angel One SmartAPI

Upstox API

Alice Blue ANT API

Main concern is stability during market open, websocket disconnects, and order failures. Anyone using these in real trading?

chethan

I use Zerodha Kite API for NSE cash + options. Data is stable but websocket sometimes drops at 9:15. You need good reconnect logic, otherwise strategy fails silently.

chethan

Angel SmartAPI is cheaper and easier approval. But documentation is messy. If you already know Python, it’s manageable. Execution speed is ok for 1–5 min strategies.

chethan

Upstox API changed a lot after v2. Breaking changes came without much warning. Support replies slow. Not ideal for serious algos.

chethan

Alice Blue works fine for MCX. Equity data sometimes lags 1–2 sec. For scalping, be careful.