Yeah I see that. 15A ones are like ~$50. I will do some research on code in my area and see what I can find, and also take a look at my panel. Who knows, there might already be one on that circuit. I appreciate the information! I wasn't aware of that potential issue!

Would that just require making sure the breaker that feeds that circuit is arc-fault protected and swapping it with one that is if it is a standard breaker? With that change, an outlet on that circuit would be protected and compliant? Basically I could add that peace of mind it provides and be code compliant with just the cost of the arc-fault breaker.

Thanks for the help. I will see if I can find some more information on code in my area.

Thanks for the help! The extra outlet will also only be lightly used. Definitely not adding any kind of constant load on that circuit. The second closet is quite large and I wanted to plug in a single LED strip and run it around the room with a switch so I can see when I have to dive in to that room to find something. Considered just branching off to run light fixtures and stuff, but the ceiling is really low in places (under the stairs) and I think just running a little LED strip around would be easier and more effective.

Awesome, thanks for the help! I will check the breaker and see what else if anything is fed from that circuit. I don't think there is anything else, but I will see.