wp option get
wp option get <key> [--format=<format>]
Examples
# Get option.
$ wp option get home
http://example.com
# Get blog description.
$ wp option get blogdescription
A random blog description
# Get blog name
$ wp option get blogname
A random blog name
# Get admin email.
$ wp option get admin_email
someone@example.com
# Get option in JSON format.
$ wp option get active_plugins --format=json
{"0":"dynamically-dynamic-sidebar\/dynamically-dynamic-sidebar.php","1":"monster-widget\/monster-widget.php","2":"show-current-template\/show-current-template.php","3":"theme-check\/theme-check.php","5":"wordpress-importer\/wordpress-importer.php"}