SMS node is used to send an SMS during a phone call. You can send to the caller’s number or a different number.Documentation Index
Fetch the complete documentation index at: https://documentation.uponai.com/llms.txt
Use this file to discover all available pages before exploring further.
This node only works for phone numbers that have SMS enabled, or when using a UponAI SMS-approved number. Read more about enabling SMS.
Choose Where to Send From
| Option | Description |
|---|---|
| SMS-approved UponAI number | Send from UponAI’s pool of pre-approved numbers. Bypasses the A2P application process entirely. Message content is a preset template — you cannot customize the text or use a prompt. |
| Agent’s associated number | Send from the phone number bound to the agent. Requires your number to have SMS enabled through the A2P application. Supports custom prompts and static content with dynamic variables. |
Configure SMS Content
- Agent’s associated number: Write a prompt to let the agent infer the SMS content, or use static SMS content. Dynamic variables are supported for static content.
- SMS-approved UponAI number: The message is a preset template. You cannot edit the content.
Configure SMS Destination
By default, the SMS is sent to the caller’s number. You can also choose to send to a different number — either a static number or a dynamic variable (e.g.{{customer_phone}}).
When Can Transition Happen
The node transitions once the SMS is successfully sent or failed to send. This takes less than 2 seconds. Transition is based purely on the SMS result.Node Settings
| Setting | Description |
|---|---|
| Global Node | See Global Node guide. |
| LLM | Choose a different model for this node — used for function argument generation and speak-during-execution message generation. |