Add device to group API

The recommended method is to update the hostGroupIds field for the device.  If you only want to change the device's group membership, a PATCH request makes the most sense.  If you're adding the device to a group, but want it to remain in the existing groups, you'll likely want to make a GET request first, and just tack the new group id onto the end.  Here's an example of updating a device's group membership (in Python):

#!/bin/env python

import requests
import json
import hashlib
import base64
import time
import hmac

#Account Info
AccessId ='48v2wRzfK94y53sq5EuF'
AccessKey ='H_D9i(f5~B^U36^K6i42=^nS~e75gy382Bf6{)P+'
Company = 'api'

Request Info
httpVerb ='PATCH'
resourcePath = '/device/devices/637'
queryParams ='?patchFields=hostGroupIds'
data = '{"hostGroupIds":"59,6,115"}'

#Construct URL 
url = 'https://'+ Company +'.logicmonitor.com/santaba/rest' + resourcePath +queryParams

#Get current time in milliseconds
epoch = str(int(time.time() * 1000))

#Concatenate Request details
requestVars = httpVerb + epoch + data + resourcePath

#Construct signature
signature = base64.b64encode(hmac.new(AccessKey,msg=requestVars,digestmod=hashlib.sha256).hexdigest())

#Construct headers
auth = 'LMv1 ' + AccessId + ':' + signature + ':' + epoch
headers = {'Content-Type':'application/json','Accept':'application/json','Authorization':auth}

#Make request
response = requests.patch(url, data=data, headers=headers)

#Print status and body of response
print 'Response Status:',response.status_code
print 'Response Body:',response.content

Note that the hostGroupIds field is called out in the patchFields query parameter, as well as in the payload.  Is this what you attempted to do?  If so, if you share your code I can help identify what went wrong.  

Thanks!

Sarah