For API commands, rate limits, schemas...etc. Please refer to below API documents.

Spot API

https://btsecom.github.io/docs/spot/en/#change-log

Futures API

https://btsecom.github.io/docs/futures/en/#change-log

OTC API 

https://btsecom.github.io/docs/otc/en/#change-log

Streaming API

https://btsecom.github.io/docs/streaming/en/#change-log

Earn API 

https://btsecom.github.io/docs/earn/en/#change-log

* API rate limit: 75 times per second per IP