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API Keys

API keys connect your app to the burn0 dashboard. Each key is linked to a project and your user account.

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Creating a key

  1. Go to burn0.dev/dashboard/keys
  2. Click “New key”
  3. Enter a name (e.g., “dev laptop”, “staging”, “production”)
  4. Optionally set a project name
  5. Copy the key immediately — it’s only shown once

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Key format

Keys start with b0_sk_ followed by 32 hex characters.

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Using the key

Add it to your project’s .env file:
Or use the CLI:

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Multiple keys

You can create multiple keys for different environments: Each key’s events appear separately in the dashboard, grouped by project name.

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Revoking a key

Click “Revoke” next to any key in the dashboard. The key is deactivated immediately — any SDK using that key will get 401 errors. Revoked keys cannot be reactivated.
Revoking a key cannot be undone. Create a new key if you need to re-enable tracking.

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Security

  • Keys are shown in full only at creation time
  • The dashboard only shows the first 10 characters
  • Add .env to .gitignore to prevent accidental commits
  • burn0 init and burn0 connect add .env to .gitignore automatically