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The Inference CLI supports different modes of authentication: Browser login (recommended for most use cases): 
inf auth login
API key (for CI / headless environments): 
inf auth set-key sk-inference...
Or via environment variable: 
export INFERENCE_API_KEY=sk-inference...
Check status: 
inf auth status
Sign out: 
inf auth logout

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Auth Priority

When multiple credentials are present, the CLI resolves them in this order:
  1. INFERENCE_API_KEY environment variable
  2. API key stored via inf auth set-key
  3. Session token stored via inf auth login (not available in headless environments)

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Configuration

The CLI stores configuration at ~/.inf/config.json, created automatically on first login.
VariableDescriptionDefault
INFERENCE_API_KEYAPI key for authentication-
INF_API_URLAPI base URL overridehttps://observability-api.inference.net
INF_PROJECT_IDOverride the active project-