> ## Documentation Index
> Fetch the complete documentation index at: https://docs.tappify.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# installPrefix

> Builds the key prefix every cached answer of one install sits under.

```ts theme={null}
function installPrefix(installId): unknown[];
```

Builds the key prefix every cached answer of one install sits under.

## Parameters

### installId

`string`

## Returns

`unknown`\[]

## Remarks

This is the prefix `tap.invalidate()` with no name invalidates.

## Example

```ts theme={null}
import { installPrefix } from '@tappify/extension-sdk';

const prefix = installPrefix('ins_test');
```