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[@salesforce/b2c-tooling-sdk](../../modules.md) / [clients](../index.md) / createUserAgentMiddleware

# Function: createUserAgentMiddleware()

> **createUserAgentMiddleware**(`config`): `Middleware`

Defined in: [packages/b2c-tooling-sdk/src/clients/middleware.ts:604](https://github.com/SalesforceCommerceCloud/b2c-developer-tooling/blob/e7c16f1ae423da0aa47b3e10be88f9770b53619b/packages/b2c-tooling-sdk/src/clients/middleware.ts#L604)

Creates middleware that sets the User-Agent header on requests.

Sets both the standard `User-Agent` header and a custom `sfdc_user_agent` header
with the same value.

## Parameters

### config

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

Configuration with the User-Agent string

## Returns

`Middleware`

Middleware that sets the User-Agent headers

## Example

```typescript
const client = createOcapiClient(config, auth);
client.use(createUserAgentMiddleware({ userAgent: 'b2c-cli/0.1.0' }));
```