If you've come across core-cosmos-sql-dev.documents.azure.com and wondered whether it's real, here's the short answer: it's a legitimate Microsoft Azure Cosmos DB endpoint. This domain isn't a typical consumer website — it's a backend database address used by applications. That explains why you won't find an about page, contact info, or social media profiles. Those aren't missing; they're simply not needed here.
For developers or IT teams checking this domain, the signals are mostly clean. It's hosted on Microsoft's own network, has a valid SSL certificate, and appears on no blacklists. The one technical item worth noting: the server still accepts connections using older TLS 1.0 and 1.1 protocols, which are deprecated because of known security flaws. Microsoft Azure endpoints generally support modern TLS, but this particular one hasn't been locked down fully.
So is core-cosmos-sql-dev.documents.azure.com a scam? No — it's a legitimate cloud service endpoint. The 'is it fake?' concern doesn't really apply here; this isn't an impersonator site. If you're integrating this endpoint into an application, just be aware of the legacy TLS support and consider whether that's acceptable for your security requirements. Otherwise, there's no reason to avoid it.