Debugging 401 Unauthorized after token refresh — clock skew between servers

• Genesys Cloud Web Messaging SDK v1.12.0
• iOS 17.2 / Android 14
• Timezone: America/Sao_Paulo

Stuck on intermittent 401 Unauthorized errors immediately after a silent token refresh. The SDK successfully retrieves a new access_token via /api/v2/oauth/token, but subsequent calls to /api/v2/conversations/messaging fail. I suspect the Genesys Cloud API servers have a clock skew greater than the JWT nbf claim tolerance. Has anyone implemented a local clock offset adjustment in the SDK wrapper to mitigate this drift?

Take a look at at the JWT nbf claim validation logic within your integration layer. The platform enforces strict temporal boundaries, meaning even minor discrepancies between client and server clocks can trigger immediate rejection of valid tokens.

Implement a local clock-skew offset in your SDK configuration. This ensures the nbf assertion aligns with the server’s expected window, preventing false 401 errors during the refresh handshake.