I see the button which will accept gifts, but how can I gift the games to my bot since it is not on my friend list?

In the bottom of your "Personalization" page, you can specify any Steam ID for the bot to send a friend invite to, invite yourself and accept it :)

A much better solution, a synchronization client that help you to transfer gifts to and from your bot by gifting is under development.

wow, thanks for the nice work, just transfered gift and tested purchase, really works.

One unfortunate scenario is when user accidentally rejects gift. I think one of solutions in such case would be to send gift to buyers dispenser inventory, so he/she can acquire gift later (instead of adding rating 1 to shop and troubling dispenser support).

can we also make trades of untradable games if, how do it goes?

"Invite friend failed" here.

Ah okay, I copied the full link, not only the number. Thanks!