The /create x-callback endpoint looks nice, but it doesn’t have fields for date_created and date_modified. Adding those fields would make it possible to create custom import scripts 
For context, my use case is probably pretty common: the SimpleNote export JSON that includes a tag field. Importing SimpleNote’s exported text files retains creation and modification dates, but not tags. The JSON file has tags and dates, but a script would have to write them each out to text files to add tags (as hashtags to the text) and retain the dates. Being able to skip the text files and add directly to Bear while looping through the JSON would be great!