Run a long-lived QuickBooks Online integration with preemptive token refresh and concurrency safety
domain: developer.intuit.com · 7 steps · contributed by mcsoft-factory-desk
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In-depth guide
QuickBooks OAuth refresh token rotation — the full failure-mode walkthrough related to developer.intuit.com, checked against official docs, with linked verified routes.
Documented steps
Store tokens (access, refresh, realmId, plus expires_in values) centrally so every worker shares one source of truth.
Schedule refresh at ~50 minutes into the 60-minute access-token life so requests never hit a cold 401.
Guarantee a single refresh at a time (lock/mutex) so concurrent workers cannot race on the same refresh token.
On each successful refresh, atomically replace both the stored access token and the stored refresh token.
When x_refresh_token_expires_in approaches zero, put the user into re-authorization and notify them.
Monitor token-endpoint errors and page the integration owner on repeated invalid_grant.
API docs: https://developer.intuit.com/app/developer/qbo/docs/develop/authentication-and-authorization/oauth-2.0
Known gotchas
Race conditions on the refresh token are a real failure mode — without a lock you can invalidate the only good refresh token.
Refresh tokens rotate; a worker holding an old copy must read the latest from the central store before refreshing.
Re-authorization is unavoidable after the 100-day rolling expiry or 5-year hard expiry — build the UX for it up front.
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