Declare the **header parameters** that you need in a **Pydantic model**, and then declare the parameter as `Header`:
-//// tab | Python 3.10+
-
-```Python hl_lines="9-14 18"
-{!> ../../docs_src/header_param_models/tutorial001_an_py310.py!}
-```
-
-////
-
-//// tab | Python 3.9+
-
-```Python hl_lines="9-14 18"
-{!> ../../docs_src/header_param_models/tutorial001_an_py39.py!}
-```
-
-////
-
-//// tab | Python 3.8+
-
-```Python hl_lines="10-15 19"
-{!> ../../docs_src/header_param_models/tutorial001_an.py!}
-```
-
-////
-
-//// tab | Python 3.10+ non-Annotated
-
-/// tip
-
-Prefer to use the `Annotated` version if possible.
-
-///
-
-```Python hl_lines="7-12 16"
-{!> ../../docs_src/header_param_models/tutorial001_py310.py!}
-```
-
-////
-
-//// tab | Python 3.9+ non-Annotated
-
-/// tip
-
-Prefer to use the `Annotated` version if possible.
-
-///
-
-```Python hl_lines="9-14 18"
-{!> ../../docs_src/header_param_models/tutorial001_py39.py!}
-```
-
-////
-
-//// tab | Python 3.8+ non-Annotated
-
-/// tip
-
-Prefer to use the `Annotated` version if possible.
-
-///
-
-```Python hl_lines="7-12 16"
-{!> ../../docs_src/header_param_models/tutorial001_py310.py!}
-```
-
-////
+{* ../../docs_src/header_param_models/tutorial001_an_py310.py hl[9:14,18] *}
**FastAPI** will **extract** the data for **each field** from the **headers** in the request and give you the Pydantic model you defined.
You can use Pydantic's model configuration to `forbid` any `extra` fields:
-//// tab | Python 3.10+
-
-```Python hl_lines="10"
-{!> ../../docs_src/header_param_models/tutorial002_an_py310.py!}
-```
-
-////
-
-//// tab | Python 3.9+
-
-```Python hl_lines="10"
-{!> ../../docs_src/header_param_models/tutorial002_an_py39.py!}
-```
-
-////
-
-//// tab | Python 3.8+
-
-```Python hl_lines="11"
-{!> ../../docs_src/header_param_models/tutorial002_an.py!}
-```
-
-////
-
-//// tab | Python 3.10+ non-Annotated
-
-/// tip
-
-Prefer to use the `Annotated` version if possible.
-
-///
-
-```Python hl_lines="8"
-{!> ../../docs_src/header_param_models/tutorial002_py310.py!}
-```
-
-////
-
-//// tab | Python 3.9+ non-Annotated
-
-/// tip
-
-Prefer to use the `Annotated` version if possible.
-
-///
-
-```Python hl_lines="10"
-{!> ../../docs_src/header_param_models/tutorial002_py39.py!}
-```
-
-////
-
-//// tab | Python 3.8+ non-Annotated
-
-/// tip
-
-Prefer to use the `Annotated` version if possible.
-
-///
-
-```Python hl_lines="10"
-{!> ../../docs_src/header_param_models/tutorial002.py!}
-```
-
-////
+{* ../../docs_src/header_param_models/tutorial002_an_py310.py hl[10] *}
If a client tries to send some **extra headers**, they will receive an **error** response.