Can a monk use the Stunning Strike feature on an opportunity attack?

Question

The description of the monk's Stunning Strike class feature states:

When you hit with a melee weapon attack, you can spend 1 ki point to make the target stunned until the end of your next turn if it fails a CON saving throw.

An opportunity attack allows you to:

use your reaction to make one melee attack against the provoking creature.

Does an opportunity attack made with a melee weapon allow a monk to use Stunning Strike if the attack hits?

Answer 1

Yes, this works.

The only conditions for using Stunning Strike are:

• you hit
• with a melee weapon attack
• You spend 1 ki point

So when you make an opportunity attack, and hit with a melee weapon attack, you can spend 1 ki point to use stunning strike.