Custom Headers in CRM Cards

Is it possible to add custom headers with a static value in the CRM cards? I need to pass ‘APP_NAME = HUBSPOT’ as a header in the data fetch URL. Can you anyone suggest any workaround for this.

A workaround would need to be implemented. I would suggest reviewing HubSpot’s serverless functions functionality - https://developers.hubspot.com/docs/cms/data/serverless-functions.
If you do not have the required Hub that supports this, alternatives include using a middleware/setting up a proxy server.
You could write something like :

exports.main = async (context, sendResponse) => {
 const fetch = require('node-fetch');

 const url = 'https://actual-server.com/data'; // The actual server URL

 const response = await fetch(url, {
 headers: {
 'APP_NAME': 'HUBSPOT'
 }
 });

 const data = await response.json();

 sendResponse({
 statusCode: 200,
 body: JSON.stringify(data)
 });
};

I hope this helps.

Thanks @Danielle_J, for the workaround.