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