# RvtMcp

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.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed · ★ 97
- Author: bimwright
- License: Apache-2.0 · policy=link-only · description only; the file stays with the author
- Source: https://github.com/bimwright/rvt-mcp
- Updated: 2026-10-23
- HTML: https://affpapa.org/en/nevibecode/mcp/rvtmcp

## What it 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.

## Install

### Claude Code (native platform)

**Install**
- The MCP registry has no launch command for it: see the repository README

## When to use it
- 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
- Call `revit_get_current_view_info` in the open model and tell me which view is active.
- Install rvt-mcp for Claude Code on this machine, reading `AGENTS.md` first 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.

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NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md