# Input Node
An **Input Node** allows you and your end-users to input text into a workflow. The text query is passed to any node that accepts a text string as input.
The most popular nodes accepting text inputs are:
1. The LLM nodes (adding the input as part of their prompt).
2. The Knowledge Base nodes (they use the input as a prompt to retrieve information from their contents).
Key characteristics:
* Inputs can be text fields of any length and are passed to their connected node in the flow.
* While inputs can be of any length, you should be mindful that LLM prompts have a limit on how long of an input they can process. If you expect long inputs, make sure you select a model with a sufficiently large context window.
* To expose an Input node to your users, you will need to set it up in the [**Interface**](https://docs.stack-ai.com/stack-ai/export-options/deploy-with-the-export-view) tab.
### Inputs in the Interface tab
The **Interface** tab is where you **export and deploy** your project, and define how end-users will interact with it. When your project is published to the Interface tab, end-users can use the agent interface to provide input (for example, by typing a message) which is then passed into the workflow.
#### Chat Assistant Interface
If you select the **Chat Assistant** interface, the message typed by the end-user becomes the workflow input and is passed into the Input Node in your workflow.
#### Form Interface
If you select a **Form** interface, inputs appear as form fields the user fills out before running the workflow.
* Each Input Node becomes a field in the form.
* You can include multiple Input Nodes, and each one will appear as a separate form field.
* You can choose which inputs are required vs optional.
* Users submit the form, then the workflow runs with those values.
---
# 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://docs.stackai.com/workflow-builder/inputs/input-node.md?ask=
```
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.
