Brevo (Sendinblue) API Key Tester

Test any AI or API key in your browser — instantly see if it's valid, and why it isn't. Nothing is stored.

Test your Brevo API key with the send email endpoint

Data verified 2026-07-13

Key format & how to get one

1. Visit https://app.brevo.com/ and sign up/login 2. Go to Settings > API Keys 3. Click 'Create a new API key' 4. Provide a name and copy the generated key 5. Free tier: 300 emails/day

Brevo (Sendinblue) API docs →

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