I haven’t seen one in the docs.
You can use a third party service like Twillo for sending SMSs.However, There needs to be an integration done between Infusionsoft and Twillo to send SMS on applying a Tag.
Please contact me, if you want the Technical Integration to be done in your end.I would be happy to do that for you.
Skype : tikumishra.tikumishra
Can we send the SMS through Keap’s business number in any way?