# Update user attributes

Updates a user's attributes. Any of the user's existing attributes not specified in the payload will be left in-place.

Endpoint: PATCH /v3/users/{user_id}/attributes
Version: 2026-01-08
Security: ZephrHmacHttp

## Path parameters:

  - `user_id` (string, required)
    Unique User identifier

## Request fields (application/json):

  - `first_name` (string)
    Example: "Joe"

  - `surname` (string)
    Example: "Blow"


## Response 200 fields

## Response 400 fields

## Response 404 fields