Multi bars REST API documentation?

Hi all,
Was looking at the status page today, and I noticed ‘’ listed as one of the endpoints. Note the lack of a symbol embedded in the url. Mousing over the question mark icon brings up a tooltip which reads ‘Multi bars’. It seems like maybe this is new (i. e. the status data only goes back to October 3rd). See screenshot below.

Is there any documentation available for this endpoint or has anyone been able to get a response from it? It tried playing around with it a bit but only received 400 or 422 errors.

Thanks in advance!

You can check how this endpoint is used in .NET SDK or in other SDKs (AFAIK both Python and Go support it now) if you don’t like C#.