Messagebird

The messagebird notifications will look like this on your Android device:

You will need:

1. Signup and Login to messagebird.com
2. Pick an SMS capable number after sign up to get some free credits
3. Go to https://www.messagebird.com/app/settings/developers/access
4. Create a new access key under 'API ACCESS (REST)' (you will want a live key)
5. Fill in MESSAGEBIRD_ACCESS_KEY="XXXXXXXX" MESSAGEBIRD_NUMBER="+XXXXXXXXXXX"
6. Add the recipient phone numbers to DEFAULT_RECIPIENT_MESSAGEBIRD="+XXXXXXXXXXX"

Set them in /etc/netdata/health_alarm_notify.conf (to edit it on your system run /etc/netdata/edit-config health_alarm_notify.conf), like this:

#------------------------------------------------------------------------------
# Messagebird (messagebird.com) SMS options

# multiple recipients can be given like this:
#                  "+15555555555 +17777777777"

# enable/disable sending messagebird SMS
SEND_MESSAGEBIRD="YES"

# to get an access key, create a free account at https://www.messagebird.com
# verify and activate the account (no CC info needed)
# login to your account and enter your phonenumber to get some free credits
# to get the API key, click on 'API' in the sidebar, then 'API Access (REST)' 
# click 'Add access key' and fill in data (you want a live key to send SMS)

# Without an access key, Netdata cannot send Messagebird text messages.
MESSAGEBIRD_ACCESS_KEY="XXXXXXXX"
MESSAGEBIRD_NUMBER="XXXXXXX"
DEFAULT_RECIPIENT_MESSAGEBIRD="XXXXXXX"