How LINE MINI App Service Notification Tokens Work and Why Rotation Is Critical

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LINE MINI App service messages rely on a user-bound, action-specific notification token rather than standard push notifications, and this token must be replaced after every successful send. The flow involves three credentials: a LIFF access token to identify the user, a channel access token for server-side API authorization, and a service notification token that authorizes notifications for a single user action. Developers must exchange the LIFF access token for a service notification token via LINE's API immediately after a user completes an approved action such as a purchase or reservation. Each token carries a remaining send count, and failing to store the renewed token returned after each successful send will cause subsequent reminders to fail. Only verified LINE MINI Apps with approved message templates can send production service notifications, and sensitive tokens must never be exposed to the browser or written to application logs.

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