> For the complete documentation index, see [llms.txt](https://docs.beamlabs.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.beamlabs.io/oauth/how-to-authorize-access/step-4-call-api-endpoints.md).

# Step 4: Call API Endpoints

Now that you have a valid access\_token, you can start using the Beam API. To make an authenticated request of one of the Beam API endpoints, the `Authorization` header must be supplied:

```
POST /api/oauth/v1/endpoints/sync  HTTP/1.1
Host: https://garageio.com
Content-Type: application/json
Accept: application/json
Authorization: Bearer <ACCESS_TOKEN>
Accept-Charset: utf-8
Accept-Encoding: gzip
```

where `<ACCESS_TOKEN>` is a valid access token for the given user. The Beam service will return with a JSON response.

{% hint style="info" %}
**Hint:** All Beam API endpoints accept JSON bodies in the request and/or return JSON bodies in the responses.
{% endhint %}

{% hint style="info" %}
**Using a prototype tool to test?** If you are using a tool, such as POSTMAN to test, read [Using RESTful Tools](/getting-started/using-restful-tools.md) section for known issues.
{% endhint %}