Install the hootnot library.
pip install git+https://github.com/hootnot/saxo_openapi.git
There are simulation accounts and other accounts. Start with the simulation account.
The simulation accounts expire after 20 days. Go to https://www.developer.saxo/accounts/sim/signup to create a new one.
Then you need a token. You can get a 24 hour token here: https://www.developer.saxo/openapi/token put it in .cred/saxo/saxo_token.txt
Go here to try things out: https://www.developer.saxo/openapi/explorer#/
Then see the Makefile.