MEXC

To purchase OCTA on MEXC https://www.mexc.com/ you will first need to register an account. (You can also view the official guide https://www.mexc.com/how-to-buy/OCTA)

After registering an account, you can then choose to buy via Debit/Credit Card or Bank Transfer.

As OCTA is traded against USDT, you will need to purchase USDT.

Once you have purchased USDT you'll want to go to the OCTA trading page located at https://www.mexc.com/exchange/OCTA_USDT

Here you can then choose "Market" and purchase a quantity of OCTA with the USDT credited to your account. ("Market" is current market value of OCTA)