> For the complete documentation index, see [llms.txt](https://docs.botdistrikt.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.botdistrikt.com/messaging-channels/facebook-messenger/facebook-checkbox-plugin.md).
# Facebook Checkbox Plugin
{% hint style="danger" %}
On May 9, 2024, you will no longer be able to access any of the functionality of the Chat Plugin. Effective immediately, Chat Plugin in guest mode is no longer available. Other features like m.me links will still be available for you to use.
{% endhint %}
The checkbox plugin allows you to display a checkbox in forms on your website that allows users to opt-in to receive messages from your bot in Messenger. If the person is currently logged in to Facebook, their profile photo and name will be displayed next to the checkbox. If the person is not logged in to Facebook or wants to log in as a different user, they can authenticate.
## Benefits
By using Facebook Checkbox Plugin, you will be able to convert authenticated website users into your Facebook chatbot marketing strategies.
Facebook Messenger Chatbox Plugin
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# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## 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, and the optional `goal` query parameter:
```
GET https://docs.botdistrikt.com/messaging-channels/facebook-messenger/facebook-checkbox-plugin.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
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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.