# Authentication

Requests to the API is authorized using an access token that should be specified in the `Authorization` header with the value `Bearer <access token>` , where `access token` is an api key obtained from the IntServ Access portal.

Example:

`Authorization: Bearer <access token>`

There are mainly two different types of access tokens that can be used: *Integration API Key* and *App API Key.* Which type of access token to use depends on the context of the request and is described in the documentation for each endpoint.

| Access Token Types  |                                                               |
| ------------------- | ------------------------------------------------------------- |
| Integration API Key | Used to authorize a request to target a specific integration. |
| App API Key         | Used for operations that is scoped to an integration app.     |


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