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Hello @aniket,
We do not provide option chain data as of now, however we do provide candle data and Greeks for options. To place an order, check out this Documentation and choose the correct ordertype, producttype, exchange and other details from the order constants and use placeOrder endpoint to place the order. If you still have any queries, please let us know and we will assist you further.
Thank you.
Regards
SmartAPI Team