SMS Step

SMS step for urgent alerts, verification codes, time-sensitive messages.

Guidelines

• body must be under 160 characters to avoid message splitting.
• Direct and actionable — essential info only.
• Avoid special characters and unnecessary URLs.

Variables

Use Liquid syntax in body:

• {{ subscriber.firstName }}
• {{ payload.* }}
• {{ steps.<http-step-id>.<property> }} — only when the upstream HTTP step declares the property in its responseBodySchema

See Also

• step-conditions.md — common pattern: SMS only when critical: true or other channels failed
• design-workflow/references/channel-selection.md — SMS is a last resort: OTP, regulatory, true emergencies