I've read this Calling REST api
and know that to query an API requires an inject, change, http request, and debug node.
I'm trying to send a GET request to this API, but to receive a 2xx response I need to include an API key, so I'm trying to do that with a msg.header in the change node, but am uncertain if I should do that with string format. I'm trying to use JSON.
Guidance on how to structure the msg.header object so the API accepts the key would be appreciated.