# Auto fill Field

The Auto fill field action uses AI to analyse conversation content and populate selected custom fields. Only the Grouped single option custom field type can be used with this action.

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Select an **Auto fill field** action from the tree to open its settings:

* **Select fields** – one or more custom fields (grouped single option type) to be auto-filled. If no match is found, nothing is set.
* **Variable name** – the name of the chat variable that will store the result of the field assignment.

Press **Save** to confirm edits.

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#### Outcome branches

The action branches into Success and Error outcomes. Nest subsequent actions under each branch as needed.

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#### Custom Field Setup

To use Auto fill field, first create one or more Grouped single option

custom fields in workspace settings:

* Go to **Teamspace Settings** > **Live Chat Fields.**
* Select **Create Custom Field**.
* Set **Type** to Single select (grouped).
* Enter a **Name**.
* Enter a **Description** (optional).
* Define groups and options in the **Field options** JSON editor.
* Set a **Default value** if required.
* Press **Create**.

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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://documentation.proto.cx/docs/modules/ai-agents/workflows-and-actions/auto-fill-field.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.