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Authentication

All endpoints use Bearer token authentication.

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OpenAI format

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Anthropic format

The Authorization: Bearer header also works for /v1/messages.

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One key, all models

A single API key works across Hal 1.0, Clarke 1.0 and Tycho 1.0. Switch models by changing the model parameter in your request.

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Getting a key

  1. Go to deploy.radium.cloud and sign up
  2. Navigate to API Keys in the dashboard sidebar
  3. Click Create key, give it a name and copy the value
  4. Export it in your terminal: export RADIUM_API_KEY="YOUR_KEY"

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Rotation and revocation

Rotate keys from the dashboard at any time. Revoked keys return 401 immediately. Create a new key before revoking the old one to avoid downtime.
Never ship your API key in client-side code or commit it to version control. Use environment variables or a secrets manager.