> For the complete documentation index, see [llms.txt](https://docs.zenlytic.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zenlytic.com/developers-beta/api-reference/welcome-to-the-zenlytic-api/servers-and-authentication.md).

# Servers & Authentication

#### Servers

Zenlytic runs separate API hosts per region. Use the host matching where your organization is hosted.

{% tabs %}
{% tab title="US" %}
**Base URL** `https://api-external.zenlytic.com/api/v2`
{% endtab %}

{% tab title="EU" %}
**Base URL** `https://euapi-external.zenlytic.com/api/v2`
{% endtab %}
{% endtabs %}

#### Authentication

Include your personal access token as a bearer token in the `Authorization` header:

```
Authorization: Bearer YOUR_API_KEY
```

{% hint style="info" %}
A token's scope — a single workspace (**Admin**) or your entire organization (**Org admin**) — is fixed when the token is created, based on your role in the workspace you created it from. It isn't visible from the token itself, so call `GET /me` to see what a given token can actually reach before building against it. See Overview for the full scope table.
{% endhint %}


---

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