Group Text+
Group Text+ makes it easy to message the people you care about using iMessage and SMS. It supports the grouptextplus://
url scheme and the x-success
parameter from the x-callback-url protocol.
Launch Group Text+
grouptextplus://x-callback-url/
Take Photo with Camera
grouptextplus://x-callback-url/camera
Attach Last Photo
grouptextplus://x-callback-url/lastphoto
Choose Animated GIF
grouptextplus://x-callback-url/gif
Pick Photo from Library
grouptextplus://x-callback-url/library
Example
Action from Launch Center Pro to open Group Text+ in the mode assigned from a list.
grouptextplus://x-callback-url/[list:Starting|Launch= |Take Photo=camera|Select Last Photo=lastphoto|Choose Animated GIF=gif|Choose Photo from Library=library]?x-success={{launch://}}
Install this action. For more examples, check Eric Pramono's introduction to Group Text+.