The REST api has a feature that allows bulk updating of data points via a PUT of a JSON array, but this has not been rigorously tested and is still in Beta. Use at your own risk since not every type of data point has been verified to work. I would suggest making a backup of your database prior to testing your specific updates.
Here is the basic idea:
Make a GET request to {YourMangoHost}/rest/v1/data-points to get all your data points as an Array in JSON format Edit your JSON Do a PUT request with the edited array of data points as the payload to {YourMangoHost}/rest/v1/data-pointsNote that since the JSON structure for a Data Point in the REST API is different than the Mango JSON Export you cannot use one with the other.