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22. BitMart
Launched in March 2018, BitMart is a crypto exchange based in the Cayman Islands. Unlike most exchanges, the platform allows US residents. It also accessible using a mobile phone, making it suitable for users on the move. The platform supports cryptocurrencies, stable coins, and tokens. It's active in 192 markets with high liquidity and a trading volume of $498 million over the past 24 hours.

API Docs: https://developer.bitmart.com/v2/en/
Fee Structure: https://www.bitmart.com/fee/en

23. CoinEx
Launched in December 2017, CoinEx is a crypto exchange whose origin is unknown; however, its believed to have originated in Hong Kong. The platform supports cryptocurrencies, stable coins, and tokens. It’s active in 228 markets with a trading volume of over $197 million in the past 24 hours.

24. Gate.io
Launched in January 2013, Gate.io is a crypto exchange based in the USA. It's available in both English and Chinese. The platform supports cryptocurrencies only. However, it boasts a wide selection of trading pairs. All in all, it’s active in 399 markets with a trading volume of over $28 million over the past 24 hours.