Provides tools for interacting with AutoCAD drawings, including reading drawing state, units, extents, layers, entities, dimensions, and text; filtering and inspecting objects; and performing native editing operations such as creating, modifying, copying, moving, rotating, mirroring, offsetting, arraying, and deleting entities via the AutoCAD API.
Click on "Deploy Server".
Wait a few minutes for the server to deploy. Once ready, it will show a "Started" state.
In the chat, type @ followed by the MCP server name and your instructions, e.g., "@AutoCAD MCP Native Bridge check the AutoCAD bridge status and summarize the current drawing"
That's it! The server will respond to your query, and you can continue using it as needed.
Here is a step-by-step guide with screenshots.
AutoCAD MCP Native Bridge 是 Windows 本机 MCP 桥接项目。Node.js MCP 服务通过命名管道与 AutoCAD 进程内的 .NET 插件通信，使兼容 MCP 客户端能够读取图纸状态、检查几何，并通过 AutoCAD API 执行编辑操作。
实机验证范围：AutoCAD 2025 / R25.0 / Windows x64，已完成安装、服务配置和
get_bridge_status连接测试。 安装器按本机 AutoCAD API 和运行时编译 2020–2027 插件；除 2025 实机验证外，其它版本仍需对应 CAD 主机加载/连接测试，不将“能编译”当作“实机兼容”。
仓库提供 installer/ WinForms 连接器：扫描 AutoCAD 2020–2027 并显示构建号；扫描并支持 OpenAI Codex、DeepSeek Harness 两种 MCP 客户端；安装时依据所选 AutoCAD 的本机 API 和运行时编译插件，部署便携 Node.js/MCP 服务，并写入所选 AI 客户端配置。状态检测分开报告 AutoCAD 插件握手、MCP tools/list 工具发现和 AI 客户端配置。AutoCAD 2020 使用 .NET Framework 4.7、2021–2024 使用 .NET Framework 4.8；2025/2026 按本机运行时选 .NET 8 或 10，2027 使用 .NET 10。AutoCAD 2027 对应 R26.0。
构建安装器：使用 Windows .NET 8 SDK 运行 dotnet publish installer/AutoCadMcpInstaller.csproj -c Release -o installer/publish。单文件输出为 installer/publish/AutoCadMcpInstaller.exe。
读取活动图纸、单位、范围、图层、模型空间实体、尺寸和文字。
按类型、图层和条件筛选对象，读取实体详细属性。
创建/编辑线、圆、多段线、弧、椭圆、文字、尺寸、填充、图层和块。
执行复制、移动、旋转、镜像、偏移、阵列、删除和属性修改。
通过 list_tools / cad_call 发现和调用原生操作。
preview_drawing_plan 与 apply_drawing_plan 支持批量计划验证和事务应用。
MCP 使用 stdio；AutoCAD 端只监听本机命名管道 AutoCAD_MCP_<年份>_V2，不开放 TCP 端口、不使用 OAuth。
Windows x64；AutoCAD 2020–2027（安装时需要相应 API 文件和可识别的 .NET 运行时）。
安装器可部署便携 Node.js LTS 和从 Microsoft 官方源校验下载的 .NET SDK；编译阶段需要访问 GitHub 源码与 NuGet。
Windows x64 上的 OpenAI Codex 或 DeepSeek Harness。其他 MCP 客户端可手动配置 stdio 服务，目前不会由连接器自动发现/管理。
安装器需要所选 AutoCAD 版本的 managed API DLL；插件按对应本机 API 编译。
从 GitHub Releases 下载 AutoCadMcpInstaller.exe，运行后选择 AutoCAD 版本和已检测的 AI 客户端，再点“安装/修复”。安装期间关闭 AutoCAD。安装器会备份旧插件和所选客户端配置，并只将本插件 bundle 子树追加到对应 AutoCAD 配置的 TRUSTEDPATHS（不关闭 SECURELOAD）。打开 AutoCAD 和所选 AI 客户端后点“测试 MCP 连接”；该检查分别报告 CAD 插件响应、MCP 工具清单能否发现和客户端配置是否写入。AI 客户端需重启/新建会话，实际工具可见性还应在客户端内核实。
手动运行 MCP 服务或开发服务端时，可以从源码安装：
git clone https://github.com/yanmiong/autocad-mcp-native.git
cd autocad-mcp-native
npm ci
npm test
npm run check重启/新建 AI 会话，先调用 get_bridge_status、drawing_summary 等只读工具确认连接，再进行写操作。完整安装、更新、卸载说明见 docs/安装与使用.md，故障排查见 docs/故障排查.md，工具参数见 docs/API.md。
初次使用采用只读检查；编辑前备份源 DWG，确认活动图纸路径。
复杂修改先预览绘图计划，再显式应用；超时后先检查当前图纸，不要盲目重放。
不要加载来源不明的插件，不要为了方便全局关闭 AutoCAD 安全加载。
不要将含客户设计、个人路径、日志或凭据的内容提交到公开仓库。
npm ci
npm test
npm run check本地 MCP 测试共 7 项，不要求运行 AutoCAD；另有安装器兼容性测试覆盖 AutoCAD 系列映射、运行时识别与构建目标选择。两者均不等于实时 AutoCAD 宿主集成验证。插件按本机版本构建示例：
powershell -ExecutionPolicy Bypass -File .\scripts\Build-AutoCADPlugin.ps1 `
-CadYear 2025 -DotNetMajor 8 `
-AutoCADDir "C:\Program Files\Autodesk\AutoCAD 2025" `
-OutputDirectory "$env:TEMP\AutoCadMcpBuild"对 AutoCAD 2020–2027 各运行时组合完成实机加载与连接测试，并在兼容矩阵中记录结果。
完善安装状态、更新与回滚界面。
对新发布的 AutoCAD 主版本及时增加运行时/API 映射和对应测试。
项目许可见 LICENSE；贡献流程见 CONTRIBUTING.md。
Related MCP server: autocad-mcp
AutoCAD MCP Native Bridge connects a Node.js MCP server to an in-process .NET plug-in in AutoCAD through a local Windows named pipe. It supports drawing inspection and native editing operations for MCP clients.
Host integration verified so far: AutoCAD 2025 / R25.0 on Windows x64. The installer compiles against the selected installation's API and runtime; other supported year/runtime combinations still require host load and pipe-connection tests. Do not manually load a prebuilt DLL into a different release. See the Chinese installation guide and docs/API.md. Licensed under MIT.
Apply the exact operations of a previously previewed plan to the same active drawing in one transaction. Any error rolls the transaction back.
Inputs: planId (required).
Call any native AutoCAD operation by name with a JSON argument object. Discover names with list_tools.
Inputs: tool (required), args.
Count model-space entities by DXF type.
Inputs: limit.
Create a named local block definition from 1 to 50 line, circle, rectangle and/or text entities; rejects duplicate names.
Inputs: name (required), entities (required).
Create a full DWG copy of the active drawing without renaming or modifying the source drawing.
Inputs: path (required).
Delete exactly one entity identified by its AutoCAD hexadecimal handle.
Inputs: handle (required).
Draw a circle in model space using center XYZ coordinates and positive radius in drawing units.
Inputs: center (required), radius (required).
Draw a line in model space using start/end XYZ coordinates in drawing units.
Inputs: end (required), start (required).
Draw a 2D lightweight polyline with optional bulge arcs. Points are XY drawing units; each bulge controls the outgoing segment.
Inputs: points (required), bulges, closed.
Draw a closed rectangular polyline in model space using opposite XY corners in drawing units.
Inputs: x1 (required), x2 (required), y1 (required), y2 (required).
Read the active AutoCAD drawing name/path and current space state.
Inputs: no named parameters.
Check the loaded AutoCAD plug-in version, named pipe, active drawing, read-only state and units.
Inputs: no named parameters.
Insert an existing local block definition into model space with uniform scale and rotation in degrees.
Inputs: name (required), position (required), scale, rotation.
Read drawing units, model-space extents, entity coordinates, dimension values and text without modifying the drawing.
Inputs: limit.
List named, non-layout, non-anonymous local block definitions that can be inserted.
Inputs: no named parameters.
List drawing layers and off/frozen/locked state.
Inputs: no named parameters.
List model-space entity handles, DXF types and layers. Use the returned handle for targeted edits.
Inputs: limit.
List every native AutoCAD operation the plug-in exposes (name, JSON params, mutating flag). Call this first when you need a capability that has no dedicated tool.
Inputs: no named parameters.
Move one entity by handle by the given XYZ offset in drawing units.
Inputs: dx (required), dy (required), handle (required), dz.
Open an existing DWG in AutoCAD through the bridge. Set readOnly to true to prevent modifications.
Inputs: path (required), readOnly.
Validate and preview up to 100 geometry, text, dimension and layer operations without changing the drawing. Returns a planId for explicit commit.
Inputs: operations (required).
Save changes in the active drawing to its existing path.
Inputs: no named parameters.
Change a model-space entity to an existing drawing layer.
Inputs: layer (required), handle (required).
Recent tool additions, removals, and schema changes observed during successful MCP inspections.
Loading tool schema changelog…
Scored across 23 tools
Most tools target distinct resource-action pairs, but get_active_drawing and get_bridge_status both expose active drawing information, and inspect_drawing_geometry overlaps somewhat with list_modelspace_entities in reading entity data. Descriptions provide enough context to disambiguate in practice.
Nearly all tools follow a consistent snake_case verb_noun pattern (get_active_drawing, draw_line, preview_drawing_plan), making names predictable. The outlier cad_call uses a noun_verb order, which is a minor deviation but still readable.
23 tools is slightly heavy for the typical 3-15 sweet spot, but each tool appears to earn its place by covering a specific CAD bridge operation. The set is well-scoped for the domain despite being on the larger side.
Core drawing, entity, layer listing, block, and plan workflows are covered, with cad_call providing a generic escape hatch for native operations. Minor gaps exist for dedicated layer creation/modification, text drawing, and dimension creation, but agents can work around them using cad_call.
Headless CAD engine & MCP server for 2D/3D drafting, solids, DXF/SVG export, and automation.
Read and edit the Revit 2024–2027 model on your PC. Needs the free Revit MCP add-in.
MCP CAD services; bundles with SmartScale (measure to CAD).
Connect any MCP client to MetaTrader 4/5 to read prices, manage positions, and place trades.
