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FastAPI · Concept

Query parameter models

Group related query parameters in a reusable Pydantic model. FastAPI reads and validates each model field as a separate query parameter.

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Syntax

parameter: Annotated[Model, Query()]

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  • Pydantic model
  • Query()
  • Field
  • Dependencies
  • OpenAPI

Source: Query Parameter Models - FastAPI. Checked 2026-11-03.