Webhook VARIANTS_OUT_OF_STOCK / VARIANTS_IN_STOCK not triggered after inventory change

Webhooks and Events
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1

Hi everyone,

I’m experiencing an issue with webhooks not being triggered in my Shopify app.

When I change the inventory of a variant (either restocking or setting it to zero), the webhooks VARIANTS_OUT_OF_STOCK and VARIANTS_IN_STOCK are not triggered.

Here’s what I’ve confirmed:

  • The PRODUCTS_UPDATE webhook is successfully received when I update the variant.
  • I’m using Webhook version 2025-04 and API version 2025-04.
  • Continue selling when out of stock is disabled.
  • I’m updating inventory directly on the variant (tried both manually adding inventory and selling out through the online store).
  • Webhook is successfully registered:
{
    id: 1326852505665,
    address: '***/webhooks/variants/out-of-stock',
    topic: 'variants/out_of_stock',
    created_at: '2025-05-05T07:49:44-04:00',
    updated_at: '2025-05-05T07:49:44-04:00',
    format: 'json',
    fields: [],
    metafield_namespaces: [],
    api_version: '2025-04',
    private_metafield_namespaces: [],
    metafield_identifiers: []
  },
  {
    id: 1326852538433,
    address: '***/webhooks/variants/in-stock',
    topic: 'variants/in_stock',
    created_at: '2025-05-05T07:49:45-04:00',
    updated_at: '2025-05-05T07:49:45-04:00',
    format: 'json',
    fields: [],
    metafield_namespaces: [],
    api_version: '2025-04',
    private_metafield_namespaces: [],
    metafield_identifiers: []
  }

Does anyone have an idea why the VARIANTS_OUT_OF_STOCK or VARIANTS_IN_STOCK webhooks aren’t firing? Could I be missing something?

Thanks in advance!

1 Like
2

Hey @Jan_Ther,

Thanks for reporting this. I’ve set up some products the same as you have described and I’m also not getting the webhooks.

Has this worked previously for you? If so, when was the last time it fired?

I’m going to dig in further to see if I can find out more on what is expected here.

3

Hi,

Thanks for your quick follow-up. This is actually my first time trying this setup, and it feels like I’ve tried every possible step so far, but without success.

I really appreciate you digging into it, let me know if you find out anything or if there’s anything specific I should test in the meantime!

Thank you
Jan

5

Hey Jan, thanks for those additional details. We are looking in to this and have a follow up question. Can you share how you are currently subscribing to the webhooks? Are you using the app configuration file, graphql mutations, or something else?

6

I’m using GraphQL mutations for all webhooks because I need to update them dynamically.

7

Hey Jan,

Our team did identify an issue with those webhooks and have implemented a fix. Are these returning for you now?

8

Hey Kyle,
I tested it, but unfortunately there’s no change. I also tried unregistering and re-registering the webhooks. Should I be using a specific version? I’m currently testing with 2025-04.

Maybe I’m doing something wrong, trying to change it via variants:

screenshot 819
screenshot 8191308×566 24.7 KB

Thank you for your time!
Jan