Add / Remove app block from thank-you page

Topic summary

A developer is building a Shopify Extension to display information on the thank-you page and seeks automation options for app block management.

Current workflow challenge:

  • Must manually navigate to Settings → Checkout → Customize to add the app block during deployment to a test app
  • Looking for an Admin API to automate adding/removing app blocks on the thank-you page

Key question:

  • Will the extension automatically appear on the thank-you page when integrated into a published app, or does it require manual addition even in production?

The developer is currently testing with an unpublished app and requests guidance on this setup process.

Summarized with AI on November 13. AI used: claude-sonnet-4-5-20250929.

Hi,

I’m currently working on a Shopify Extension to enhance information display on the thank-you page.

During the deployment of the extension to a TEST app, I find myself manually navigating to “Settings → Checkout → Customize” to “Add app block.”

I’m curious if there is an Admin API available for automatically performing the “Add app block” and “Remove app block” actions on the “Thank You” page.

If not, as I’m currently testing the extension with one of my unpublished app, will the extension be automatically added to the thank-you page when integrated into a published app?

Appreciate your guidance on this matter.

Sincerely,

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