When Shopify introduced expiring offline access tokens, many apps faced a painful edge case: if the migration response was lost, merchants often had to reopen the app and re‑authorize. The latest Developer Changelog change makes that scenario far less common by allowing a seamless retry of the token exchange for up to seven days, all without a user session.
What Changed
If an app migrates a non‑expiring offline token to an expiring one and the initial response is missing, the same request can be sent again using the original token and client credentials. Shopify will return the identical access‑token/refresh‑token pair, extend the access token’s expiry when necessary, and leave the refresh token’s expiry untouched. The retry window closes after seven days, after a successful refresh, or when a newer token acquisition (e.g., a fresh authorization code) replaces the pair.
Who’s Affected
The update targets apps that are moving existing non‑expiring offline tokens to the new expiring format without a live merchant session. If your integration follows the "migrate existing tokens without a user session" guide, you’ll benefit directly. Merchants themselves won’t notice any UI change, but they’ll experience fewer interruptions when something goes wrong on the backend.
Why It Matters
Losing the migration response used to force developers to ask merchants to reopen the app, re‑authenticate, and potentially lose trust. With the retry capability, you can programmatically recover the missing tokens, keeping the app functional and preserving a smooth merchant experience. It also reduces support tickets and shortens incident‑resolution time.
How to Implement the Retry
Example curl request (replace placeholders with real values):
curl -X POST "https://{shop}.myshopify.com/admin/oauth/access_token" \
-d "client_id=YOUR_API_KEY" \
-d "client_secret=YOUR_API_SECRET" \
-d "grant_type=refresh_token" \
-d "refresh_token=ORIGINAL_NON_EXPIRING_TOKEN"
Best Practices & Common Pitfalls
Conclusion & Next Steps
The new resilient token exchange gives developers a safety net that eliminates the need for merchant‑initiated re‑auth in most failure cases. Update your migration logic to include the retry step, monitor logs for "invalid_subject_token" responses, and retire any lingering non‑expiring tokens. Doing so will keep your app’s offline access reliable and your merchants happy.
Ready to future‑proof your token handling? Dive into Shopify’s migration guide, add the retry logic today, and share your experience in the Shopify Community forums.
