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CLI Authentication

Authenticate the LeanMCP CLI with your API key to access your projects and deployments.

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Get Your API Key

  1. Go to LeanMCP Dashboard
  2. Navigate to Settings → API Keys
  3. Create a new API key with appropriate permissions
  4. Copy the API key (starts with airtrain_)

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Login Command

leanmcp login
The CLI will prompt you interactively for your API key: 
LeanMCP Login

? Enter your LeanMCP API key: airtrain_xxxx...

Validating API key...
API key validated successfully!
Logged in successfully!

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Verify Authentication

Check if you’re logged in: 
leanmcp whoami
Example Output: 
LeanMCP Authentication Status

Logged in
  API Key: airtrain_2ef4da...
  API URL: https://api.leanmcp.com
  Last updated: 12/18/2025, 4:38:05 PM

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Logout

Remove stored credentials: 
leanmcp logout
Example Output: 
Logged out successfully!

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Credential Storage

The CLI stores your credentials securely in:
  • macOS/Linux: ~/.leanmcp/config.json
Keep your API key secure. Do not share it or commit it to version control.

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Troubleshooting

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Not Authenticated

Not authenticated
Run 'leanmcp login' to authenticate.
Solutions:
  • Run leanmcp login and enter your API key
  • Verify your API key is correct

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API Key Invalid

API key validation failed
Please check your API key and try again.
Solutions:
  • Verify your API key is correct
  • Check if the API key has expired
  • Create a new API key in the dashboard

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Next Steps

Project Management

Start creating and managing MCP projects