A year ago, you could audit an X profile by opening the URL. That door is mostly closed now. X serves a minimal public card to signed-out visitors and asks everyone else to log in. The audit you care about. Does my brand profile look legitimate to someone who doesn't have an account. Has to run against that minimal card.
The X Presence Audit works from exactly what a signed-out visitor sees. Paste your profile URL. It extracts the og:title, og:image, visible bio, location, and website link from the public meta tags, then scores whether each signal is present.
The most common failures aren't surprising. No website link in the bio. No location. A default avatar. Nothing indexable by search engines. Each one is a ten-second fix that matters because the signed-out public card is what Google, Bing, and AI models are scraping when they build their entity graph of your brand.
If you want the methodology behind why X still matters as a sameAs target. Even with all the gating. Chapter 11 of The $20 Dollar Agency, Social Media Playbook, covers the current state. Chapter 37 of The $100 Network, Entity-Based SEO, is where the sameAs strategy lives.