Re-Establish Lost API Connection for Inventory Sync w/ Vendor

Shopify Discussion

Topic summary

A Shopify store owner is experiencing intermittent connection losses between their vendor inventory sync app and individual product variants. The disconnections typically occur when inventory levels are low, preventing proper stock updates when the vendor sells units.

Troubleshooting steps suggested:

  • Check if the vendor app offers manual resync or reimport functionality
  • Delete and re-import affected variants rather than toggling “Track Quantity” (which no longer works)
  • Verify the app has proper write permissions for inventory updates
  • Investigate potential API rate limits (429 errors)

Next actions:

  • Contact the vendor app support to check for API limit issues or 429 “Too Many Requests” errors
  • Request a bulk resync or relink feature if not currently available
  • Review app logs for silent failures during sync operations

The discussion remains open as the store owner investigates API limits as a potential root cause.

Summarized with AI on October 27. AI used: claude-sonnet-4-5-20250929.
1

I use a vendor app to connect their inventory to my store. The app is used to initially download items and then update on-hand inventory to stay in sync with the vendor. It has a habit, on a variant by variant basis, of losing that connection at some point, usually when inventory levels are low, which means my store’s inventory isn’t reduced when the vendor sells units. Is there any way I can reinitialize the connection from my side? None of the product data changes along the way. I used to toggle “Track Quantity” to reconnect, but that doesn’t work anymore. Thanks.

2

@Glow_Up_Fits ,

The most direct solution:

Check if your vendor app offers a manual resync or reimport function—most do. If not, try fully deleting and re-importing the affected variants (not just toggling “Track quantity”). Also, confirm the app has write permissions for inventory updates and that your store hasn’t hit API limits.

If issues persist, contact the app developer to request a relink or bulk resync feature. Also which vendor app are you using for now?

If it resolves your issue, please mark my answer as a solution, and let me know if you need further assistance. Thank you

3

Thanks for your feedback. How can I identify my API limits? That could be a root cause here.

4

@Glow_Up_Fits ,

1. Ask the Vendor App Support

Most vendor inventory apps operate using Shopify’s Admin API. Ask the app provider:

  • Are API limits being hit during sync?

  • Do you log or handle 429 Too Many Requests errors?

  • Can I trigger a manual re-sync or reconnect from the app?

Apps often silently fail or delay syncs when API limits are reached.

or it can be scanned in theme code if you are familiar with coding.