# Create a Check Definition

`CreateCheckDefinition`

`POST /api/dataquality/checkdefinitions`

- [OpenAPI fragment](https://www.lusid.com/docs/api/lusid/endpoints/check-definitions/CreateCheckDefinition.json)
- [Rendered page](https://www.lusid.com/docs/api/lusid/endpoints/check-definitions/CreateCheckDefinition)

Creates a Check Definition. Returns the created Check Definition at the current effectiveAt.
Note that Check Definitions are mono-temporal, however they can have Time-Variant Properties.
Upserted Properties will be returned at the latest AsAt and EffectiveAt

## Referenced schemas

- [CreateCheckDefinitionRequest](https://www.lusid.com/docs/api/lusid/schemas/CreateCheckDefinitionRequest.txt)
- [CheckDefinition](https://www.lusid.com/docs/api/lusid/schemas/CheckDefinition.txt)

[< CheckDefinitions](https://www.lusid.com/docs/api/lusid/endpoints/check-definitions/llms.txt)