MCP TypeScript SDK (V2)
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    Interface CreateMcpExpressAppOptions

    Options for creating an MCP Express application.

    interface CreateMcpExpressAppOptions {
        allowedHosts?: string[];
        host?: string;
        jsonLimit?: string;
    }
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    Properties

    allowedHosts? host? jsonLimit?

    Properties

    allowedHosts?: string[]

    List of allowed hostnames for DNS rebinding protection. If provided, host header validation will be applied using this list. For IPv6, provide addresses with brackets (e.g., '[::1]').

    This is useful when binding to '0.0.0.0' or '::' but still wanting to restrict which hostnames are allowed.

    host?: string

    The hostname to bind to. Defaults to '127.0.0.1'. When set to '127.0.0.1', 'localhost', or '::1', DNS rebinding protection is automatically enabled.

    jsonLimit?: string

    Controls the maximum request body size for the JSON body parser. Passed directly to Express's express.json({ limit }) option. Defaults to Express's built-in default of '100kb'.

    '1mb', '500kb', '10mb'

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