https://swyftx.com.au/ Swyftx is an AUSTRAC registered crypto currency trading platform with tiny spreads, low fees and non-inflated market prices. Trade with stop losses, take profits and triggered orders on a mobile & desktop ready modern web application.
https://ftx.com/ - homepage https://help.ftx.com/hc/en-us - documentation https://help.ftx.com/hc/en-us/articles/360028807171-API-docs - API documentation Requesting an API connection with FTX, really promising (derivative) exchange. From spot to futures to options to fun games (FTX Battle Arena) and a really impressive team behind it.
Mandala Exchange, powered by Binance Cloud
https://mandala.exchange API Docs: https://trade.mandala.exchange/apidocs/
IDEX has released their fully rebuilt version 2 of their exchange, including new APIs. Delta does not seem to sync anymore.
Nexo.io -- Not really an "exchange", but it's a crypto lending service where I transfer, hold and stake coins, so I want to be able to see the transactions to and from it in my portfolio.