+1 for wanting to pull data out of the Apple Health app and into Beeminder. I was guessing I could do this with a bit of ifttt magic but they don't seem to have Health integration either.
Back story: I have goals that are set up using Runkeeper, but I rarely use Runkeeper itself anymore as I've found the watchOS Activity app pretty decent since watchOS 3 came out. I've left Runkeeper's ambient 'pocket track' distance tracking on but it regularly misses long walks that the Activity app knows about so the Runkeeper goals on Beeminder are only there as a kind of backup goal now. My actual goal at the moment is based on filling the activity rings on my watch but I'd like to set up a cumulative goal on Beeminder to make me go over and above the watch's goal on a regular basis.