A work around would be that you could run a report on landing page performance for those in your nurture program. If there's one that has significantly less visitors, you could assume the link is broken. You should also run an email link performance report as well and compare it to the landing pages to be certain. (IE if the click through is high but the landing page is low, you could assume the link is broken.)
You could also clone your nurture, then add yourself to each segmentation (if you've using them!) and run yourself through the program at an accelerated rate and check the various links. To ensure nothing has broken, you could just re-run yourself every so often.