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Basic API key authentication

MCP Gateway supports basic API key authentication for new connections to MCP Gateway.

To enable it, add the following to your app.yaml:

auth:
  enabled: true

At startup, MCP Gateway will read the expected API key from the AUTH_KEY environment variable.

To authenticate, clients must include the key in their request headers, as shown in the following example:

x-lunar-api-key: YOUR_API_KEY