As someone mentioned above, terb.cc is the best place to start. Here is this specific post that lists all the Toronto agencies:
https://terb.cc/xenforo/threads/agency-verification-list.808408/
There is also this post about the top agency providers in 2022:
https://terb.cc/xenforo/threads/ ... -award-2022.805077/
I've only mongered in Toronto once, and it was during an overnight layover near YYZ. I used one of the agencies for an outcall to my hotel and it worked out very well. Seems like outcall is as popular as incall there, compared to other cities I've experienced.
Lastly, Toronto's hobbying scene is diverse (lots of nationalities) and affordable compared to the US, and relatively safe in that BBFS is rare and discouraged. Have fun and stay safe!