We present an open-source pipeline for eXtended Reality (XR) that helps researchers and developers integrate eye-tracking metrics into their studies. Built with the Microsoft Mixed Reality Toolkit 3 (MRTK3) and Unity, this pipeline enables recording, replaying, and analyzing gaze data on virtual humans, static objects, and dynamic targets. The pipeline includes demo environments with pre-defined Areas of Interest (AOIs), scripts for extracting head-mounted display (HMD) and eye-tracking data to CSV files, and an R-based analysis script for analyzing first-order gaze metrics (e.g., fixations and saccades). By open sourcing this toolkit, we seek to aid applied researchers in cognitive psychology and human-computer interaction in gathering objective metrics. Our comprehensive documentation also ensures accessibility for newcomers, facilitating a deeper understanding and reproducibility of eye-tracking methodologies. Future work will focus on refining automation techniques and evaluating the pipeline’s effectiveness in an introductory eye-tracking course.