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

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

# Function: customParameterKey()

> **customParameterKey**(`slug`): `string`

Defined in: [packages/core/src/domain/lab/lab-parameter-catalog.ts:44](https://github.com/pablo-albaladejo/kaiord/blob/3eacbe62ef72342d970523967cc5155b5935bb85/packages/core/src/domain/lab/lab-parameter-catalog.ts#L44)

Build a free-parameter key for the long tail (`custom:<slug>`).

## Parameters

### slug

`string`

## Returns

`string`