Mike Sullivan noticed that the Bing Webmaster API has been down for over five days now. I had him share a screen shot with me of it failing and he did so. In short, he was surprised to see no one complaining even after five days of it being offline.
Mike said on Twitter "Bing Webmaster Tools API goes down for 5 days and no one notices? Sad..."
@rustybrick Bing Webmaster Tools API goes down for 5 days and no one notices? Sad...
— Mike Sullivan (@AnalyticsEdge) July 11, 2018
Here is his screen shot where you can see the API throwing an error code when trying to get a list of user sites:
You can try it yourself by logging into your Bing Webmaster Tools area, going to the API section, generating your own key and trying out their API.
Personally, I cannot remember the last time I logged into Bing Webmaster Tools, which is sad also.
Forum discussion at Twitter.