# Authentication

{% hint style="info" %}
To obtain your API ID for use with the 8SELECT API, please speak to your account manager.
{% endhint %}

Your API ID is permanently linked to your 8SELECT account. It must be included in every call to the API as a `x-api-id` header to authorize your request:

```
POST /graphql
Host: https://api.8select.io
x-api-id: <Your API ID>
```


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# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.8select.io/api/general/authentication.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.