> For the complete documentation index, see [llms.txt](https://docs10.xenioo.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs10.xenioo.com/actions-and-operations/cards/additional-buttons/xenioo.bots.actions.base.operations.buttonpostbackoperation.md).
# Postback Button Action
This button will postback to Xenioo to activate one or more operations. Use this button to move the conversation flow to other interactions on user click.
### Settings
The action uses the following settings:
| Setting | Description | [Parsed](https://app.gitbook.com/@xenioo-1/s/workspace/~/drafts/-Lg2nKXO6MBdgV8rk5-H/primary/actions-and-operations/dynamic-parsing) |
| ------- | ---------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------- |
| Text | The text that will be displayed by the button. | :white\_check\_mark: |
### Remarks
Under the context menu, this action will work exactly like the typical [Quick Reply Button Action](/actions-and-operations/content/xenioo.bots.actions.base.buttonaction.md).
This action supports an additional Style Action that can be used to extend the look & feel of the button on platform that support styling.
### Trigger
Click. This action will trigger any child operation as the user clicks the button.
### Variables
This action produces the following variables after being triggered:
| Variable | Description |
| ------------------- | ------------------------------------------------------------------------------------------------------------------ |
| last\_command | The full text of the button being triggered |
| last\_user\_message | The text that triggered the button. Depending on expressions, it may not be entirely identical to the button text. |
Every [entity](/ai/entities.md) specified in the detected [expression ](/ai/expressions.md)will be translated to a runtime variable named after the entity name.
### Availability
Channel specific availability follows the table below:
| Channel | Availability |
| ---------------- | ------------------ |
| Facebook | Fully Available. |
| WhatsApp | **Not Available.** |
| Telegram | **Not Available.** |
| Web | Fully Available. |
| Alexa | **Not Available.** |
| Google Assistant | **Not Available.** |
| Slack | **Not Available.** |
| API | Fully Available. |
This action can be used only inside interactions and not as child of other actions. Any account can use this action regardless of [subscription level](https://app.gitbook.com/@xenioo-1/s/workspace/~/drafts/-Lg2nKXO6MBdgV8rk5-H/primary/basic-concepts/your-account/the-free-plan).
---
# Agent Instructions
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## 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://docs10.xenioo.com/actions-and-operations/cards/additional-buttons/xenioo.bots.actions.base.operations.buttonpostbackoperation.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.