> ## Documentation Index
> Fetch the complete documentation index at: https://docs.prefect.io/llms.txt
> Use this file to discover all available pages before exploring further.
# variables
# `prefect.server.api.variables`
Routes for interacting with variable objects
## Functions
### `get_variable_or_404`
```python theme={null}
get_variable_or_404(session: AsyncSession, variable_id: UUID) -> orm_models.Variable
```
Returns a variable or raises 404 HTTPException if it does not exist
### `get_variable_by_name_or_404`
```python theme={null}
get_variable_by_name_or_404(session: AsyncSession, name: str) -> orm_models.Variable
```
Returns a variable or raises 404 HTTPException if it does not exist
### `create_variable`
```python theme={null}
create_variable(variable: actions.VariableCreate, db: PrefectDBInterface = Depends(provide_database_interface)) -> core.Variable
```
Create a variable.
For more information, see [https://docs.prefect.io/v3/concepts/variables](https://docs.prefect.io/v3/concepts/variables).
### `read_variable`
```python theme={null}
read_variable(variable_id: UUID = Path(..., alias='id'), db: PrefectDBInterface = Depends(provide_database_interface)) -> core.Variable
```
### `read_variable_by_name`
```python theme={null}
read_variable_by_name(name: str = Path(...), db: PrefectDBInterface = Depends(provide_database_interface)) -> core.Variable
```
### `read_variables`
```python theme={null}
read_variables(limit: int = LimitBody(), offset: int = Body(0, ge=0), variables: Optional[filters.VariableFilter] = None, sort: sorting.VariableSort = Body(sorting.VariableSort.NAME_ASC), db: PrefectDBInterface = Depends(provide_database_interface)) -> List[core.Variable]
```
### `count_variables`
```python theme={null}
count_variables(variables: Optional[filters.VariableFilter] = Body(None, embed=True), db: PrefectDBInterface = Depends(provide_database_interface)) -> int
```
### `update_variable`
```python theme={null}
update_variable(variable: actions.VariableUpdate, variable_id: UUID = Path(..., alias='id'), db: PrefectDBInterface = Depends(provide_database_interface)) -> None
```
### `update_variable_by_name`
```python theme={null}
update_variable_by_name(variable: actions.VariableUpdate, name: str = Path(..., alias='name'), db: PrefectDBInterface = Depends(provide_database_interface)) -> None
```
### `delete_variable`
```python theme={null}
delete_variable(variable_id: UUID = Path(..., alias='id'), db: PrefectDBInterface = Depends(provide_database_interface)) -> None
```
### `delete_variable_by_name`
```python theme={null}
delete_variable_by_name(name: str = Path(...), db: PrefectDBInterface = Depends(provide_database_interface)) -> None
```
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