A:348 Generally no, but not entirely.
It takes your Action to look through your familiars eyes, and you can do so until the start of your next turn.
So any spell that requires an Action to cast is not available; BUT, there is wiggle room for a Bonus Action Spell to be used, like Misty Step, though.
Also, if you have the Metamagic Quicken (or similar ability) you could pull off a Bonus Action offensive ranged Spell Attack npnp.