I got fed up with the clearing of pending devices all the time during development/testing and I didn’t want to use the reject option from the web ui. So playing a bit with the API from bash I got this:
MENDER_SERVER_URI='https://hosted.mender.io';
MENDER_SERVER_USER='[YOUR_USERNAME HERE]';
JWT=$(curl -X POST -u $MENDER_SERVER_USER $MENDER_SERVER_URI/api/management/v1/useradm/auth/login);
curl -H "Content-Type: application/json" -H "Accept: application/json" -H "Authorization: Bearer $JWT" -d '{"status": "pending"}' -X POST https://hosted.mender.io/api/management/v2/devauth/devices/search?per_page=500 | jq '[.[] | {id}]' | grep id | sed -r 's/\"//g' | sed -r 's/\ //g' | cut -d':' -f2 | while read i; do \
curl \
-H 'Content-Type: application/json' \
-H 'Accept: application/json' \
-H "Authorization: Bearer $JWT" \
-X DELETE https://hosted.mender.io/api/management/v2/devauth/devices/{$i}; done
Which decommissions/dismisses the latest 500 pending devices.
The above as an oneliner:
sudo apt-get install curl jq && MENDER_SERVER_URI='https://hosted.mender.io' && MENDER_SERVER_USER='[YOUR_USERNAME HERE]' && JWT=$(curl -X POST -u $MENDER_SERVER_USER $MENDER_SERVER_URI/api/management/v1/useradm/auth/login) && curl -H "Content-Type: application/json" -H "Accept: application/json" -H "Authorization: Bearer $JWT" -d '{"status": "pending"}' -X POST https://hosted.mender.io/api/management/v2/devauth/devices/search?per_page=500 | jq '[.[] | {id}]' | grep id | sed -r 's/\"//g' | sed -r 's/\ //g' | cut -d':' -f2 | while read i; do curl -H 'Content-Type: application/json' -H 'Accept: application/json' -H "Authorization: Bearer $JWT" -X DELETE https://hosted.mender.io/api/management/v2/devauth/devices/{$i}; done
What the above commands do is authenticate with the server, get the list of (last 500) pending devices, and calls the decommission command for each one in a bash-based while loop. Apart from the loop the rest are REST API calls. The script was used in Ubuntu but could easily be modified (curl, jq and while parts) to work in your OS.
I am happy now