A Dart SDK of version 3.9.0-163.0.dev or greater is required to connect to Dart and Flutter applications.

[hatemragab]

⏺ dart - Connect to DTD (MCP)(uri: "ws://127.0.0.1:53536/lUIxFcHZBBs=/dtd")
  ⎿  Connection succeeded                                                                                           

⏺ Perfect! Connected to the Dart Tooling Daemon. Now let me perform a hot reload:

⏺ dart - Hot reload (MCP)(clearRuntimeErrors: true)
  ⎿  Error: A Dart SDK of version 3.9.0-163.0.dev or greater is required to connect to Dart and Flutter applications.

⏺ Bash(dart --version)
  ⎿  Dart SDK version: 3.9.2 (stable) (Wed Aug 27 03:49:40 2025 -0700) on "macos_arm64"

⏺ The Dart SDK version is correct (3.9.2), but the DTD hot reload isn't working. Let me use the Flutter CLI hot
  reload command instead by sending "r" to the running Flutter process:

this is my flutter doctor there are problem while compare the versions please check

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.35.5, on macOS 15.6.1 24G90 darwin-arm64, locale en-EG)
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 16.2)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2025.1)
[✓] IntelliJ IDEA Ultimate Edition (version 2025.2)
[✓] VS Code (version 1.103.2)
[✓] Connected device (4 available)
[✓] Network resources

• No issues found!

[LipJ01]

See #256, it's likely that your Dart version is fine and that you need to be running the app through your IDEs debug mode, just running the app via the cli doesn't connect it to the DTD (please someone correct me if I'm wrong).

[divan]

Trying to make sense of this absolute mess with no luck to use the mcp. Finding so far:

• MCP asks you to provide DTD URL which should start with 'ws://' schema
• default flutter output doesn't have it, instead it gives two devtools/VM URLs with http:// schema
• if you open DevTools url, you'll immediately see 'ws://' url, but it's wrong URL (it's "VM Service Connection")
• if you use this wrong ws URL, you'll get error Error: A Dart SDK of version 3.9.0-163.0.dev or greater is required to connect to Dart and Flutter applications.
• for proper DTD URL, you need to run 'flutter run --print-dtd' - then it'll print line similar to The Dart Tooling Daemon is available at: ws://127.0.0.1:50557/FUsiyev5UBk=
• if you provide this ws:// url to MCP, server, it'll report "Connected!", but any call will result in Error: No active debug session to take a screenshot error

Feels like there is no human in the loop of developing this feature.