This is covered with the !bang called !isup: Example: !isup espn.com .

posted by x.15a2 Community Leader2 years and 2 months ago Link

I think the idea of displaying a graph and having an instant answer makes sense. The graph would add a nice visual aspect. Also, this is definitely the type of thing Instant Answers are made for, an answer to a question rather than a full website.
posted by <hidden> • 2 years and 2 months ago Link