Hi Kavy,
@Arthamon is correct regarding the Dashboard uptime visibility and the API. Uptime statistics from the dashboard at this point in time are relatively limited.
For statistics on uptime you can use the Organization > Overview page. This won't provide you with the specific uptime of the device unfortunately.
The other option is to manually view each MR and MS to check the uptime (MS needs to be on firmware 15.21.1+ and MR on 30.x+).
Options:
1. Go to Organization > Overview. Then select the tab that says "Devices". You can see each of the connectivity bars there. Unfortunately it does not give you an uptime metric, but it does give you the dates of when the device was connected to the Cloud or not.
2. Go to Organization > Overview. Select the "Networks tab". Click on the "+" sign next to the CSV button. Select "network health" and "% offline" from the "+" dropdown.
3. Go to Switching > Switches and select your switch and view the uptime there.
4. Go to Wireless > Access points and select your AP and view the uptime there.
Maria P | Network Support Engineer, Cisco Meraki