# Passthrough

The *Agencies* *API* includes a passthrough feature for agencies that manage Brand (or *Advertiser*) accounts on impact.com.

To access a managed brand account, you'll need:

* Your Agency `AccountSID` & `AuthToken` values
* The managed brand account's Account ID value (use the [Retrieve an Advertiser](broken://spaces/3an35NjrMgGKemtN6H10/pages/ff3982c431436da3564afbcb01af94c883ec51fe#get-agencies-accountsid-a-dvertiser-advertiseraccountid) endpoint to retrieve the `Id` value)

Requests append the Brand API endpoints to standard Agency API requests, like so:

```
https://api.impact.com/Agencies/<AccountSID>/Advertisers/<AdvertiserAccountID>/
```

Refer to the [Brand API documentation](/brand-api-reference/brand-api-reference-v13/readme/introduction.md) for details on using those endpoints. All brand endpoints are supported via the API passthrough.

#### Example request

{% tabs %}
{% tab title="cURL" %}

```bash
curl 'https://api.impact.com/Agencies/<AccountSID>/Advertisers/2747168/Campaigns' \
  -X GET \
  -u '<AccountSid>:<AuthToken>' \
  -H 'Accept: application/json'
```

{% endtab %}
{% endtabs %}


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```
GET https://integrations.impact.com/agency-v3/agency-v2/readme/passthrough.md?ask=<question>
```

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The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.