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API Keys

API keys let your applications authenticate with the LanguageCheck API.

Who Can Create API Keys

You must:

  • Be logged in to https://languagecheck.ai
  • Have a Pro plan, or be part of a Team Enterprise workspace

In Team Enterprise, only users with the proper team permission can create team-wide API keys.

Where to Create Keys

  1. Log in to LanguageCheck.
  2. Open the user menu.
  3. Select Developers.
  4. Open the API Keys page.
  5. Click Generate API Key.

Important Behavior

  • The full API key is shown only once, at creation time.
  • You can create multiple keys.
  • You can revoke keys you no longer need.
  • If you are a Team Enterprise user with permission, you can create keys that work for the entire team.
  • Create separate keys for development, staging, and production.
  • Use one key per app or integration to simplify revocation.
  • Save keys in a secret manager or environment variables.
  • Never share keys in chat, tickets, screenshots, or email.
  • Never commit keys to source control.

Rotation and Revocation

  • Rotate keys regularly and immediately if exposure is suspected.
  • When rotating, create a new key first, deploy it, then revoke the old key.
  • Revoke unused or temporary keys as soon as possible.

Troubleshooting

  • If you do not see Developers page, check your plan and account role.
  • If a key is lost, generate a new one; the original cannot be displayed again.