An endovascular stapling apparatus for delivering a staple to a vessel of a patient, including a plurality of clips, a housing, and a rod. Each of the clips includes a bridge and legs that self-transition from a biased state to a natural state in which the legs each form a loop. The housing defines a channel and a window open to the channel. The clips are retained within the channel in the biased state. The rod is slidably disposed within the channel, selectively moves the clips toward and away from the window, and releases the clips from the window.