Use Curl to send an HTTP POST:

ACCESS_TOKEN=POST_SERVER_ITEM_ACCESS_TOKEN
ENVIRONMENT=production
LOCAL_USERNAME=`whoami`
REVISION=`git log -n 1 --pretty=format:"%H"`

curl https://api.rollbar.com/api/1/deploy/ \
  -F access_token=$ACCESS_TOKEN \
  -F environment=$ENVIRONMENT \
  -F revision=$REVISION \
  -F local_username=$LOCAL_USERNAME

Place this command in your deploy script so that it runs once the deploy has completed successfully.

If the POST is successful, you will receive a JSON response like:

{"data": {}}

If using a version control system other than Git, change the revision= line as appropriate to set the revision ID.

Parameter Reference

access_token
Your project access token. Required.
environment
Name of the environment being deployed, e.g. "production". Required.
revision
Revision number/sha being deployed. If using git, use the full sha. Required.
local_username
User who deployed. Optional.
rollbar_username
Rollbar username of the user who deployed. Optional.
comment
Deploy comment (e.g. what is being deployed). Optional.