Mypy

Strawberry works with Mypy out of the box thanks to dataclass_transform . No plugin is needed for standard Strawberry types, inputs, interfaces, enums, scalars, or unions.

Pydantic integration

If you use strawberry.experimental.pydantic , add the pydantic plugin to your mypy configuration:

[mypy]
plugins = pydantic.mypy

Or in pyproject.toml :

[tool.mypy]
plugins = ["pydantic.mypy"]

No Strawberry-specific plugin is required.

Deprecated plugin

If you still have strawberry.ext.mypy_plugin in your mypy configuration, it will emit a DeprecationWarning at startup. You can safely remove it — it is a no-op.