Update theme assets

documented

Update assets for a theme.

PUT /admin/api/2026-01/themes/{theme_id}/assets.jsonOnline Storeno implementation yet0 runs

Input

shop*

Shop domain (myshop.myshopify.com)

your-store.myshopify.com

theme_id*

Theme ID

123456789

key*

Asset key (e.g., assets/theme.css)

assets/theme.css

value*

Asset content

/* CSS or Liquid content */

Calls Shopify as you (your API key is your account); keychains.dev holds the credentials.