RvtMcp — Claude Code MCP server: what it does, how to install
A local bridge from an MCP client to a running Revit session: 237 typed tools, a C# escape hatch, and optional ToolBaker tools of your own.
Open on GitHubWhat RvtMcp does
RvtMcp joins an MCP client to a Revit session that is already open. The .NET 8 server speaks MCP over stdio; a small add-in inside each supported release from 2022 to 2027 answers on localhost TCP up to 2024, then over a named pipe from 2025 on. Traffic never leaves the machine, and lengths at the tool boundary are millimetres.
Agents get 237 typed tools for everyday modelling work, plus a C# escape hatch when nothing in the set fits. ToolBaker is optional: it turns a pattern you repeat into a tool of your own running on the shared runtime. Family Editor authoring is not covered yet.
Setup is Windows only. The PowerShell script drops the add-in into every Revit it finds and places the server at %LOCALAPPDATA%\Bimwright\rvt-mcp\server\current\rvt-mcp.exe. Nothing will answer until a model is loaded and MCP is switched on in the ribbon under Add-Ins → RvtMcp; calling revit_get_current_view_info is how you tell the link is alive.
What it helps with
- read the active view and its type from a live model
- run a batch of edits inside one transaction
- reach an API corner the typed tools miss, through C#
- bake a repeated workflow into a personal tool
- wire an agent to Revit without sending data off the machine
Example prompts for the agent
- Call
revit_get_current_view_infoin the open model and tell me which view is active. - Install rvt-mcp for Claude Code on this machine, reading
AGENTS.mdfirst and previewing every change before writing. - Use rvt-mcp to list the elements in the active view and leave the rest of the model alone.
How to install RvtMcp
Install
The MCP registry has no launch command for it: see the repository README
Step by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about RvtMcp
How do I install RvtMcp in Claude Code?
Shut Revit down, pull the latest release archive with PowerShell and unpack it, then run install.ps1 -WhatIf -Client claude to read the preview. When it looks right, run install.ps1 -Client claude for real. Restart your client afterwards, load a model in Revit and switch MCP on in the ribbon.
What does RvtMcp do?
It hands an agent typed MCP tools for working with a live Revit model. The connection is local, so nothing leaves your machine.
What has to be running before the tools respond?
Windows with the add-in installed for your Revit version, Revit itself open on a model, and the MCP toggle in the ribbon switched on under Add-Ins.
