> For the complete documentation index, see [llms.txt](https://docs.lenses.io/latest/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lenses.io/latest/mcp/lenses-mcp-server/getting-started/configuration.md).

# Configuration

The MCP server will load the configuration from a `.env` file.

<table><thead><tr><th width="232.21484375">VARIABLE NAME</th><th width="267.40625">DESCRIPTION</th><th width="281.38671875">DEFAULT</th><th width="122.1015625">REQUIRED</th></tr></thead><tbody><tr><td>TRANSPORT</td><td>MCP server transport</td><td>http (if <code>OAUTH_ENABLED</code> is <code>True</code>)<br>stdio (if <code>OAUTH_ENABLED</code> is <code>False</code>)</td><td>No</td></tr><tr><td>HOST</td><td>MCP server host address</td><td>0.0.0.0</td><td>No</td></tr><tr><td>PORT</td><td>MCP server port</td><td>8000</td><td>No</td></tr><tr><td>OAUTH_ENABLED</td><td>Switch to enable/disable OAuth</td><td>False</td><td>No</td></tr><tr><td>LENSES_URL</td><td>Lenses HTTP Endpoint</td><td>http://localhost:9991</td><td>Yes</td></tr><tr><td>LENSES_ADVERTISED_URL</td><td>The publicly available Lenses HTTP endpoint (needs to be accessibly by MCP clients for OAuth)</td><td><code>LENSES_URL</code> value</td><td>No</td></tr><tr><td>MCP_ADVERTISED_URL</td><td>The publicly available URL for this MCP server (needs to be accessible to MCP clients)</td><td></td><td>Yes if <code>OAUTH_ENABLED</code> is <code>True</code></td></tr><tr><td>MCP_SCOPES</td><td>OAuth scopes required by Lenses resources. Published in protected-resource metadata so compliant clients include them in their /authorize request</td><td>read,write,delete</td><td>No</td></tr><tr><td>LENSES_API_KEY</td><td>Alternative authentication using a Lenses Service Account API key</td><td></td><td>Yes if <code>OAUTH_ENABLED</code> is <code>False</code></td></tr></tbody></table>


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