Is it possible to set header on every request?

[mariadb-zdraganov]

I saw that when using chai.request.agent(app) there is a possibility to reuse the cookie across all the requests.
If my API needs header authentication, is it possible to append a header on every request similar to the cookie workflow?

Something like this:

const agent = chai.request.agent(app)
agent.beforeSend(request => request.set('X-AUTH', 'authentication token'))