> ## Documentation Index
> Fetch the complete documentation index at: https://docs.unleashx.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Overview

The Input Variables API lets you **manage the workspace-level registry of variable keys** — CSV column names and template tokens (e.g. `mobile_no`, `name`, `plan`) that audiences and agent prompts reference. Variables are either **System** (predefined, read-only, shared across every workspace) or **User Defined** (created per workspace).

* Use **Create Input Variable** to add a new User Defined variable.
* Use **List Input Variables** to retrieve the paginated registry, including where each variable is used.
* Use **Update Input Variable** to modify or soft-delete an existing User Defined variable.

## Related endpoints

* [Create Input Variable](/api-reference/input-variables/create-input-variable)
* [List Input Variables](/api-reference/input-variables/list-input-variables)
* [Update Input Variable](/api-reference/input-variables/update-input-variable)