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url: /docs/api/core/functions/isCustomParameterKey.md
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[**@kaiord/core**](../README.md)

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[@kaiord/core](../README.md) / isCustomParameterKey

# Function: isCustomParameterKey()

> **isCustomParameterKey**(`key`): `boolean`

Defined in: [packages/core/src/domain/lab/lab-parameter-catalog.ts:49](https://github.com/pablo-albaladejo/kaiord/blob/3eacbe62ef72342d970523967cc5155b5935bb85/packages/core/src/domain/lab/lab-parameter-catalog.ts#L49)

Whether a parameter key denotes a free (custom) parameter.

## Parameters

### key

`string`

## Returns

`boolean`