post purchase extension: subscription_limit_exceeded

Topic summary

A developer has built a post-purchase upsell extension that offers subscriptions. When attempting to purchase multiple subscriptions simultaneously, they encounter a subscription_limit_exceeded error.

Key Details:

  • The error occurs specifically when buying more than one subscription
  • Testing is being conducted in a development store
  • The issue appears to be related to Shopify’s subscription limits during the post-purchase checkout flow

Current Status:
The problem remains unresolved with no responses or solutions provided yet. The developer is seeking guidance on how to handle multiple subscription purchases through their extension.

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

I’ve created a post purchase upsell extension that provides subscriptions. But when I’m buying more than one subscription I’m getting:

subscription_limit_exceeded

error. This is being tested in a development store as well.