> For the complete documentation index, see [llms.txt](https://docs.emobiq.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.emobiq.com/emobiq-server/002-api/005-header.md).

# Header

## Description

Header can be read on Action, which will be received as part of the client request.

## Example use case

* **Content Negotiation**: The "Accept" header allows the client to specify the media types it can understand, enabling the server to send an appropriate response format. For instance, a client can request JSON or XML data based on its capabilities.
* **User-Agent Information**: The "User-Agent" header provides information about the client's software, enabling the server to tailor the response according to the capabilities or constraints of the client.
* **Tracking and Analytics**: Clients can send headers containing tracking information or analytics data, helping the server collect insights about how its resources are being used.

## How to use

1. Open the **Header** tab.
2. For each Action and Method, Headers can be added, edited or deleted.
3. The following fields are available:
   * **Type**: HTTP Header to read from (example: `Content-Type`)
   * **Value**: Default value of the header if the client request doesn't provide one (example: `application/json`) ![](/files/OrDv3HA1YGcvErJqhaMe)