# Adding headers in request and/or response
The reverse proxy can add headers, cookies, and URL parameters during request processing. Configure these values on a content provider URI pattern.
The URI pattern works as a filter. Headers, cookies, and URL parameters are applied only to requests that match that pattern. On the URI pattern, create `Meta Data` entries with the values you want to send.
The property name is required. The property value can be a static value, the current username or password, or a Groovy script.
{% stepper %}
{% step %}
### Open the content provider
Sign in to **Webconsole** and go to **Access Control** → **Content Providers**.
Open the content provider you want to update.
{% endstep %}
{% step %}
### Configure the URI pattern
Create a new **URI Pattern**.
Or edit an existing one.
If you create a new pattern, configure it and add it to the list.
{% endstep %}
{% step %}
### Add a new metadata type
On the **URI Pattern** screen, scroll to `Meta Data` and click the `plus` icon.
In the dialog, select `Meta Data Type`.
* For headers, use `Set Header`.
* For cookies, use `Set Cookie`.
Add a `Meta Data Name`, then click the `plus` icon.
{% endstep %}
{% step %}
### Configure the property type
In the new dialog, enter the header or cookie name in `Property Name`. Then select the `Property Type`.
This example uses `Static Value`. You can also use `User Name`, `Password`, or `Groovy Script`.
{% endstep %}
{% step %}
### Add `Property Value`
For `Static Value`, enter the string to send.
If you need an empty value, use the `Empty Value` property type from the previous step. For Groovy logic, use `Groovy Script`.
{% endstep %}
{% step %}
### Optional: Propagate Through Proxy
You can also uncheck `Propagate Through Proxy`.
If this option is checked, which is the default, the header is added to the HTTP response and is visible in the client browser.
If it is unchecked, the header is added only to requests that the proxy sends to the backend server.
{% endstep %}
{% step %}
### Optional: Propagate on Error
You can uncheck `Propagate on Error`.
If this option is unchecked, headers are added only to successful responses.
If it is checked, headers are also added to error responses such as `404` and `500`.
{% endstep %}
{% step %}
### Save the configuration
Click `Save`.
{% hint style="info" %}
If you need more headers or cookies, repeat the steps above.
{% endhint %}
{% endstep %}
{% endstepper %}
---
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