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[@salesforce/b2c-tooling-sdk](../../../modules.md) / [operations/mrt](../index.md) / createAccessControlHeader

# Function: createAccessControlHeader()

> **createAccessControlHeader**(`options`, `auth`): `Promise`\<\{ \}\>

Defined in: [packages/b2c-tooling-sdk/src/operations/mrt/access-control.ts:191](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/e7c16f1ae423da0aa47b3e10be88f9770b53619b/packages/b2c-tooling-sdk/src/operations/mrt/access-control.ts#L191)

Creates an access control header for an MRT environment.

## Parameters

### options

[`CreateAccessControlHeaderOptions`](../interfaces/CreateAccessControlHeaderOptions.md)

Create options

### auth

[`AuthStrategy`](../../../auth/interfaces/AuthStrategy.md)

Authentication strategy (ApiKeyStrategy)

## Returns

`Promise`\<\{ \}\>

The created header

## Throws

Error if request fails

## Example

```typescript
import { ApiKeyStrategy } from '@salesforce/b2c-tooling-sdk/auth';
import { createAccessControlHeader } from '@salesforce/b2c-tooling-sdk/operations/mrt';

const auth = new ApiKeyStrategy(process.env.MRT_API_KEY!, 'Authorization');

const header = await createAccessControlHeader({
  projectSlug: 'my-storefront',
  targetSlug: 'production',
  value: 'my-secret-header-value'
}, auth);

console.log(`Created access control header: ${header.id}`);
```