Variables | Smallest AI Docs

Variables let you insert dynamic values into prompts, conditions, and API calls. Use them to personalize conversations, pass data between systems, and create dynamic flows.

Syntax

{{variable_name}}

Variables are replaced with actual values at runtime.

Variable Types

Type	Source	Example
System	Platform-provided	`{{caller_phone}}`, `{{call_duration}}`
User Defined	You create	`{{company_name}}`, `{{promo_code}}`
API	From API responses	`{{customer_name}}`, `{{account_tier}}`

System Variables

Variable	Description
`{{caller_phone}}`	Caller’s phone number
`{{call_time}}`	When call started
`{{call_duration}}`	Elapsed seconds
`{{call_direction}}`	”inbound” or “outbound”
`{{agent_id}}`	This agent’s ID
`{{call_id}}`	Unique call identifier

Default Values

Handle missing variables with fallbacks:

Hello {{customer_name|there}}!

If customer_name is empty → “Hello there!”

Implementation

Variables work in both agent types with slight differences in how they’re configured.

Single Prompt

Variables in Configuration Panel

Conversational Flow

Variables in Workflow Tab