With Brevo already connected, the detail’s Status tab includes a Test connection button that checks, on the spot, that the saved key is still valid against Brevo’s real API.
Requirements: Admin role.
- Open Brevo’s Details and go to the Status tab.
- Click Test connection.
Result: “Connection successful” if the key is still valid, or “Couldn’t connect: [reason]” if the key was revoked or changed (section 8). Remember that “Connection successful” checks the key, not email sending — if sending fails, check the verified sender or authenticated domain in your Brevo account (section 3).
The example below again uses Google Sheets — with Brevo connected, the same “Status” tab shows the “Test connection” and “Disconnect” buttons.

