Repository navigation
[Feature Request] Drop mcp dependency in Dash 4.3.0 to avoid excess dependencies #3835
Description
When upgrading from a clean 4.2 Dash (24 dependencies) to 4.3, it requires an additional 26 newly installed dependencies to perform the upgrade. See original install log and 4.2 -> 4.3 upgrade log below.
It seems that a lot of the new installs are related to the new MCP feature. Would it be possible to make this an optional install for the next release?
Resolving dependencies... (14.1s)
Package operations: 24 installs, 0 updates, 0 removals
- Installing colorama (0.4.6)
- Installing markupsafe (3.0.3)
- Installing blinker (1.9.0)
- Installing charset-normalizer (3.4.7)
- Installing certifi (2026.6.17)
- Installing click (8.4.1)
- Installing idna (3.18)
- Installing itsdangerous (2.2.0)
- Installing jinja2 (3.1.6)
- Installing narwhals (2.22.1)
- Installing packaging (26.2)
- Installing urllib3 (2.7.0)
- Installing werkzeug (3.1.8)
- Installing zipp (4.1.0)
- Installing flask (3.1.3)
- Installing plotly (6.8.0)
- Installing typing-extensions (4.15.0)
- Installing requests (2.34.2)
- Installing setuptools (82.0.1)
- Installing janus (2.0.0)
- Installing retrying (1.4.2)
- Installing importlib-metadata (9.0.0)
- Installing nest-asyncio (1.6.0)
- Installing dash (4.2.0)
(venv) PS C:\Users\gxvh\Python\dash_test5> poetry update
Updating dependencies
Resolving dependencies... (24.3s)
Package operations: 26 installs, 1 update, 0 removals
- Installing attrs (26.1.0)
- Installing pycparser (3.0)
- Installing rpds-py (2026.5.1)
- Installing annotated-types (0.7.0)
- Installing h11 (0.16.0)
- Installing cffi (2.0.0)
- Installing anyio (4.14.0)
- Installing pydantic-core (2.46.4)
- Installing referencing (0.37.0)
- Installing typing-inspection (0.4.2)
- Installing cryptography (49.0.0)
- Installing jsonschema-specifications (2025.9.1)
- Installing pydantic (2.13.4)
- Installing python-dotenv (1.2.2)
- Installing starlette (1.3.1)
- Installing httpcore (1.0.9)
- Installing httpx (0.28.1)
- Installing pywin32 (312)
- Installing jsonschema (4.26.0)
- Installing pydantic-settings (2.14.2)
- Installing pyjwt (2.13.0)
- Installing python-multipart (0.0.32)
- Installing httpx-sse (0.4.3)
- Installing sse-starlette (3.4.4)
- Installing uvicorn (0.49.0)
- Installing mcp (1.28.0)
- Updating dash (4.2.0 -> 4.3.0)
Writing lock file
(venv) PS C:\Users\gxvh\Python\dash_test5>
Reacted by Feffery and Alexander Romanov
Metadata
Metadata
Assignees
Labels
No labels
Activity
ndrezn commentedon Jun 23, 2026
Hi @ghaarsma ! I agree we need to reduce the dependencies -- I did some digging on this and it looks like we should be able to drop the
mcpdependency entirely without making Dash MCP optional. Because most of those dependencies are downstream deps ofmcp, we'd be able to trim the excess significantly.Thank you for calling this out!
[-][Feature Request] Can we make the new Dash 4.3 MPC feature optional?[/-][+][Feature Request] Drop `mcp` dependency in Dash 4.3.0 to avoid excess dependencies[/+]ghaarsma commentedon Jun 25, 2026
@ndrezn Thank you for your consideration. Both
Pydanticandmcpwere added as new dependencies in Dash 4.3 and indeed removingmcpwould be a significant improvement.ghaarsma commentedon Jul 6, 2026
This has been addressed in Dash 4.4