tree: 7c97255c16146659e20dc74bd9537220a1f051da [path history] [tgz]
  1. _docs/
  2. bin/
  3. lib/
  4. test/
  5. test_fixtures/
  6. tool/
  7. analysis_options.yaml
  8. CHANGELOG.md
  9. CONTRIBUTING.md
  10. LICENSE
  11. pubspec.yaml
  12. README.md
pkgs/dart_mcp_server/README.md

The Dart Tooling MCP Server exposes Dart and Flutter development tool actions to compatible AI-assistant clients.

Status

WIP. This package is still experimental and is likely to evolve quickly.

Set up your MCP client

Note: all of the following set up instructions require Dart 3.9.0-163.0.dev or later.

The Dart MCP server can work with any MCP client that supports standard I/O (stdio) as the transport medium. To access all the features of the Dart MCP server, an MCP client must support Tools and Resources. For the best development experience with the Dart MCP server, an MCP client should also support Roots.

If you are using a client that claims it supports roots but does not actually set them, pass --force-roots-fallback which will instead enable tools for managing the roots.

Here are specific instructions for some popular tools:

Gemini CLI

To configure the Gemini CLI to use the Dart MCP server, edit the .gemini/settings.json file in your local project (configuration will only apply to this project) or edit the global ~/.gemini/settings.json file in your home directory (configuration will apply for all projects).

{
  "mcpServers": {
    "dart": {
      "command": "dart",
      "args": [
        "mcp-server",
        "--experimental-mcp-server", // Can be removed for Dart 3.9.0 or later.
      ]
    }
  }
}

For more information, see the official Gemini CLI documentation for setting up MCP servers.

Gemini Code Assist in VS Code

Note: this currently requires the “Insiders” channel. Follow instructions to enable this build.

Gemini Code Assist's Agent mode integrates the Gemini CLI to provide a powerful AI agent directly in your IDE. To configure Gemini Code Assist to use the Dart MCP server, follow the instructions to configure the Gemini CLI above.

You can verify the MCP server has been configured properly by typing /mcp in the chat window in Agent mode.

Gemini Code Assist list mcp tools

For more information see the official Gemini Code Assist documentation for using agent mode.

Cursor

Add to Cursor

The easiest way to configure the Dart MCP server with Cursor is by clicking the “Add to Cursor” button above.

Alternatively, you can configure the server manually. Go to Cursor -> Settings -> Cursor Settings > Tools & Integrations, and then click “Add Custom MCP” or “New MCP Server” depending on whether you already have other MCP servers configured. Edit the .cursor/mcp.json file in your local project (configuration will only apply to this project) or edit the global ~/.cursor/mcp.json file in your home directory (configuration will apply for all projects) to configure the Dart MCP server:

{
  "mcpServers": {
    "dart": {
      "command": "dart",
      "args": [
        "mcp-server",
        "--experimental-mcp-server", // Can be removed for Dart 3.9.0 or later
        "--force-roots-fallback" // Workaround for a Cursor issue with Roots support
      ]
    }
  }
}

For more information, see the official Cursor documentation for installing MCP servers.

GitHub Copilot in VS Code

Note: requires Dart-Code VS Code extension v3.114 or later.

To configure the Dart MCP server with Copilot or any other AI agent that supports the VS Code MCP API, add the following to your VS Code user settings (Command Palette > Preferences: Open User Settings (JSON)):

"dart.mcpServer": true

By adding this setting, the Dart VS Code extension will register the Dart MCP Server configuration with VS Code so that you don‘t have to manually configure the server. Copilot will then automatically configure the Dart MCP server on your behalf. This is a global setting. If you’d like the setting to apply only to a specific workspace, add the entry to your workspace settings (Command Palette > Preferences: Open Workspace Settings (JSON)) instead.

For more information, see the official VS Code documentation for enabling MCP support.

Tools

Tool NameTitleDescription
connect_dart_tooling_daemonConnect to DTDConnects to the Dart Tooling Daemon. You should get the uri either from available tools or the user, do not just make up a random URI to pass. When asking the user for the uri, you should suggest the “Copy DTD Uri to clipboard” action. When reconnecting after losing a connection, always request a new uri first.
get_runtime_errorsGet runtime errorsRetrieves the most recent runtime errors that have occurred in the active Dart or Flutter application. Requires “connect_dart_tooling_daemon” to be successfully called first.
hot_reloadHot reloadPerforms a hot reload of the active Flutter application. This is to apply the latest code changes to the running application. Requires “connect_dart_tooling_daemon” to be successfully called first.
get_widget_treeGet widget treeRetrieves the widget tree from the active Flutter application. Requires “connect_dart_tooling_daemon” to be successfully called first.
get_selected_widgetGet selected widgetRetrieves the selected widget from the active Flutter application. Requires “connect_dart_tooling_daemon” to be successfully called first.
set_widget_selection_modeSet Widget Selection ModeEnables or disables widget selection mode in the active Flutter application. Requires “connect_dart_tooling_daemon” to be successfully called first. This is not necessary when using flutter driver, only use it when you want the user to select a widget.
get_active_locationGet Active Editor LocationRetrieves the current active location (e.g., cursor position) in the connected editor. Requires “connect_dart_tooling_daemon” to be successfully called first.
flutter_driverFlutter DriverRun a flutter driver command
pub_dev_searchpub.dev searchSearches pub.dev for packages relevant to a given search query. The response will describe each result with its download count, package description, topics, license, and publisher.
remove_rootsRemove rootsRemoves one or more project roots previously added via the add_roots tool.
add_rootsAdd rootsAdds one or more project roots. Tools are only allowed to run under these roots, so you must call this function before passing any roots to any other tools.
dart_fixDart fixRuns dart fix --apply for the given project roots.
dart_formatDart formatRuns dart format . for the given project roots.
run_testsRun testsRun Dart or Flutter tests with an agent centric UX. ALWAYS use instead of dart test or flutter test shell commands.
create_projectCreate projectCreates a new Dart or Flutter project.
pubpubRuns a pub command for the given project roots, like dart pub get or flutter pub add.
analyze_filesAnalyze projectsAnalyzes the entire project for errors.
resolve_workspace_symbolProject searchLook up a symbol or symbols in all workspaces by name. Can be used to validate that a symbol exists or discover small spelling mistakes, since the search is fuzzy.
signature_helpSignature helpGet signature help for an API being used at a given cursor position in a file.
hoverHover informationGet hover information at a given cursor position in a file. This can include documentation, type information, etc for the text at that position.