HFT requires dedicated co located server of the TRADER ITSELF, not the broker, costs around 12 lakhs a year, and capital required for HFT is rougly 50 to 100 crores, with thousands of orders released into the system daily, and requires a dedicated team of algo professionals to create, mantain and make periodic adjustments to the algo.
Hope you are capitalised for all this.
If you are, you dont even need Zerodha.
Any broker will give you this service.