Update User Attributes: Braze action

Inputs

The fields this action accepts.

Every field can be mapped from an upstream trigger, AI step, table row, or hard-coded literal.

Field	Type	Required	Description
External User ID external_id	string	Required	—
Email email	string	Optional	The email address. Used as the recipient or identifier depending on context.
Phone phone	string	Optional	Phone number in E.164 format (with country code, no spaces).
First Name first_name	string	Optional	Contact's first (given) name.
Last Name last_name	string	Optional	Contact's last (family) name.
Custom Attributes (JSON) custom_attributes	string	Optional	{"plan":"premium","mrr":99}

Sample request

{
  "external_id": "{{trigger.external_id}}",
  "email": "e.g. user@example.com",
  "phone": "e.g. +14155551234",
  "first_name": "e.g. Jane",
  "last_name": "e.g. Doe"
}

Returns

{
  "message": "success",
  "attributes_processed": 1
}

Use these fields in downstream nodes for routing, logging, or error handling.

FAQ

Questions about Update User Attributes.

What does the Update User Attributes action do in Braze?

Upserts user-level attributes (plan tier, country, signup_date, lifetime_value). Drives Braze segmentation. The standard "external state changed → reflect in Braze" sync action for keeping audience filters accurate.

What inputs does Update User Attributes require?

Required: External User ID. Every input accepts a static value or a variable from any upstream node in your workflow.

Can I use dynamic inputs from earlier workflow nodes?

Yes. Any field on this action can pull values from upstream nodes, whether that's a form response, a trigger payload, an AI output, or a lookup result.

What happens if Braze returns an error?

The workflow pauses on the failed node, the error message is captured in the run log, and you can retry the run with one click. Auto-retry policies are configurable per workflow with exponential backoff up to 5 attempts.

Does Update User Attributes support batch operations?

Yes. Run Update User Attributes inside a Loop node to process arrays. Tiny Command handles Braze's rate limits automatically so you don't have to throttle manually.

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