> For the complete documentation index, see [llms.txt](https://mirror-ai-api-docs.gitbook.io/mirror-ai-api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mirror-ai-api-docs.gitbook.io/mirror-ai-api/generate-avatar/what-is-face-id.md).

# What is Face ID?

After generating a request, you will receive a face ID, which serves as a unique identifier for your face. 

This token allows you to use all subsequent API requests related to your face, such as modifying, understanding, and generating stickers.

{% hint style="info" %}
Face ID is generated based on the photo and style. For every new photo and new style, the Face ID will be different.
{% endhint %}


---

# Agent Instructions
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## Querying This Documentation
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Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://mirror-ai-api-docs.gitbook.io/mirror-ai-api/generate-avatar/what-is-face-id.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
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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.