If you were subscribed to the 14-day free trial or to a subscription plan (Starter, Advanced, Pro), and the plan has expired, your API key will become invalid.

When your system or mobile app sends an API Request with an invalid key, a QR Code image with a preview watermark will be returned.

See sample below:

Such QR Codes are unscannable by most QR Code scanning apps.

To activate your API key, login to your account and start/extend your subscription.

If you still have questions, feel free to reach out to our support team at [email protected]

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