nu-mcp Crate

This crate provides support for MCP (Model Context Protocol) in Nushell.

Feature Flag

The mcp feature flag controls whether MCP functionality is compiled into Nushell.

Building with MCP Support

To build Nushell with MCP support, use:

cargo build --features mcp

Running MCP Server

To run Nushell with the MCP server enabled:

nu --mcp

Transport Options

The MCP server supports two transport modes:

• stdio (default): Standard I/O transport for local usage.
• http: Streamable HTTP with SSE for remote access.

To use HTTP transport:

nu --mcp --mcp-transport http

To specify a custom port (default is 8080):

nu --mcp --mcp-transport http --mcp-port 3000

If Nushell was built without the MCP feature and you attempt to use the --mcp flag, it will display an error message instructing you to recompile with the feature enabled.