Domain Authority and Page Authority are rough proxies, not gospel — but when you're deciding which backlinks are worth chasing or which of your own pages need a link-building push, having a fast, bulk-capable check matters more than a perfectly precise number.
The Authority Checker runs single lookups or bulk batches, keeps a backlink cache so repeated checks don't burn unnecessary requests, and lets you import a link list directly rather than re-typing URLs one at a time.
If you've used it to triage a link-building campaign or sanity-check a domain before buying it, we'd like to hear how it held up.