Yes, as long as our API is accessible then you can use it. However, we have historically had an issue with certain ISPs in China who have blocked our domain. There has been nothing we can do about it, they have been very difficult to contact to try to get our domain unblocked.
Domain is 'https://chat.stream-io-api.com'
Additionally, we are hosted on AWS and for certain Enterprise size clients we can spin up dedicated AWS architecture to give them a dedicated instance of our API. In China this is not possible because AWS cannot provide all of its hosting services in China.