Nexus MCP Server
Provides a proxy MCP server for Unreal Engine, enabling AI clients to discover and connect to Unreal Editor instances, manage assets, execute blueprints, and perform other game development tasks via the NexusLink plugin.
Click on "Install 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., "@Nexus MCP Serverlist all blueprints in the Content folder"
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.
nexus-vscode — VSCode / Cursor MCP 代理扩展
语言 / Language: 简体中文 · English
VSCode / Cursor 端 MCP 代理:本地 HTTP 服务器(默认 :6900),发现 UE 实例,经 WebSocket 把 AI 工具调用转发给 NexusLink。蓝图、资产、PIE 等能力由 UE 侧提供,本扩展不实现游戏逻辑。
四端端口与开关层数见 NexusLink 使用指南。本扩展是三层开关中的 IDE 层。
依赖
组件 | 要求 |
nexus-vscode | 与 UE |
NexusLink | NexusLink Releases 的 |
VSCode / Cursor | VS Code Engine ^1.85.0 |
Node.js(仅本地构建) | 20+ |
Related MCP server: UE-Editor-MCPServer
安装与使用
须开总开关:扩展在启动后激活(
onStartupFinished),但 MCP HTTP 默认不监听。将nexusMcp.enabled设为true后才监听;改回false立即停止,无需重载窗口。
1. UE 前置
安装并启用 NexusLink,勾选 启用 MCP 服务器(步骤见 usage-guide §2)。未勾选时扫描为空。
2. 安装本扩展
方式 A — 扩展商店(推荐):在 VSCode / Cursor / CodeBuddy / Windsurf 搜索 Nexus MCP(Open VSX · VS Marketplace)。
方式 B — vsix:从 NexusVSCode Releases 下载 → Extensions: Install from VSIX... → 重载窗口。
然后 Settings 搜索 nexusMcp → Nexus Mcp: Enabled = true(默认 :6900)。
3. 配置项
配置键 | 默认值 | 说明 |
|
| 总开关;改值立即启停 |
|
| AI 客户端端口;修改后重载窗口或关开 |
|
| UE 扫描起始 |
|
| UE 扫描结束 |
|
| 定时发现间隔(秒) |
|
| 写门控: |
4. 状态栏与命令
状态栏显示已连接项目名 / 未连接,点击切换实例。
命令( | 说明 |
| 手动扫描 |
| 弹出列表并连接 |
| 断开当前 WebSocket |
| 复制 AI 客户端 JSON |
| 后续远端调用在代理排队,不发往 UE |
| 解除暂停 |
唯一实例自动连接;多实例优先 netRole=Editor。断线保留工具列表缓存;耐久读可返回带 _proxy.degraded 的上次快照。会话层契约见 proxy-session.md。
AI 客户端
须先 nexusMcp.enabled = true。默认 http://127.0.0.1:6900/stream。端口顺延时以启动通知为准。
Cursor(~/.cursor/mcp.json):
{
"mcpServers": {
"nexus-unreal": {
"url": "http://127.0.0.1:6900/stream"
}
}
}旧版客户端可用 http://127.0.0.1:6900/sse。也可用命令面板一键复制。
已连接时 tools/list 合并 UE 工具。多实例并发可在 arguments 中带 targetPort。
常见问题
AI 客户端「MCP 初始化超时」
确认 nexusMcp.enabled 为 true、UE 已启用 MCP、状态栏已显示项目名、AI 端口与实际监听一致。
工具列表不刷新
连接/断开后会推送 notifications/tools/list_changed。未更新时重连 MCP 或重启 AI 会话。
查看日志
Help → Toggle Developer Tools → Console,搜索 Nexus MCP。
改了 UE 资产但磁盘未变化
属 NexusLink 侧落盘行为。见 usage-guide FAQ。
本地构建与发版
py scripts/build_vscode.py --version <version> --output release/或 npm ci && npm run build 后 npx vsce package --no-dependencies。调试:npm run watch,F5 开 Extension Development Host。
GitHub Release 正文仅来自 CHANGELOG.md(py scripts/extract_release_notes.py --version X.Y.Z --verify)。tag:nexus-vscode-vX.Y.Z。商店详情页文案在 README.marketplace.md,不与本 README 混用。
源码:src/(入口 extension.ts)
License
MIT © byteyang
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