There is. I was just checking their forum also (seems to run the same system as Hubitat's) and discovered mention of a local Json page that may or may not still exist or work. I am not home to check it right now. Here is their thread on the local page:
http://community.neur.io/t/most-efficient-way-to-fetch-raw-sensor-data/1250/10
And link to their API:
https://api-docs.neur.io/
Just posted to their site asking if there is any newer information on the local method. I always prefer to access information in my network if possible.
