As I reported at Search Engine Land - Bing announced at SMX Advanced two big things. First, Bing AMP Viewer is coming this summer to the mobile search results. Second, Bing Webmaster Tools now supports debugging JSON-LD markup.
Here is the slide from Bing announcing the AMP Viewer:
This is not coming until this summer, but at least it is on the roadmap.
If you login to Bing Webmaster Tools, you can now debug your JSON-LD. In early March, Bing added support for JSON-LD and we saw it show up in the search results and now webmasters can use Bing Webmaster Tools to help debug their JSON-LD.
Here is a screen shot from Glenn Gabe on Twitter of him using the tool:
Forum discussion at Twitter.