The Send SMS Workflow Action enables businesses to send customized SMS messages as part of their workflow, ensuring timely communication that enhances engagement and improves outcomes. From appointment reminders to event updates, the SMS action helps businesses maintain a strong connection with their contacts.
Follow these steps to set up the “Send SMS” action in your automation workflow:
1. Configure the SMS Action


2. Customize Message Content
_Note: You can also use custom values for _Contact Engagement Score and Attribution Medium ID (from First/Latest Attribution).
3. Write the Message with AI:

4. Add Attachments (Optional)
5. Test the SMS Message
6. Save and Activate the Workflow

This example demonstrates how to create a multi-stage appointment reminder to reduce no-shows and keep clients well-informed:
3.1-Hour Reminder
Question: How do I add an attachment to my SMS?**
**Answer: To add an attachment, include a URL link in the “Add Attachment” field when setting up the SMS action.
Question: Can I test the SMS before it goes live?**
**Answer: Yes, use the “Test Phone Number” field to send a test SMS and confirm content and attachments.
Question: Are there restrictions on message length?**
**Answer: While the message length varies by carrier, it’s advisable to keep SMS messages concise to avoid potential issues.
Question: Where can I find the Engagement Score field?**
**Answer: The Engagement Score field is available in the custom value picker for accounts that have scoring criteria established under Settings → Manage Scoring.
Question: Can I use dynamic fields in the SMS message?**
**Answer: Absolutely. Dynamic fields like {{contact.first_name}} personalize each message based on contact data.
Question: How can I track SMS performance?**
**Answer: Check your analytics to view message delivery rates and engagement metrics, and to adjust content if necessary.
Question: Can I send images via this SMS action (MMS)?
Answer: While the “Add Attachment” field allows you to include a URL, sending an actual image file (MMS) depends on your integrated telephony provider settings. Sending a link is the most reliable way to ensure the recipient can view the content regardless of their carrier.
Question: Can I use the “Send SMS” action to automatically include a lead’s attribution information, such as how they first found my business?**
**Answer: Yes. In the message custom value picker, you can select the Attribution Medium ID. This allows you to dynamically insert data from either the First Attribution or Latest Attribution , which can be useful for internal notifications to your team to let them know which marketing channel generated the lead.