[keycloak-user] Permanent API key?

Hi guys, Is it possible to have a permanent access token, or API key, that I can store on the client of my API? Or maybe I need to store my login/password on the client and retrieve a normal access token from the device? in my use case, I have remote devices writing to my API. Those devices are not easy to update. I see that some services uses an API key, passed as a query string, that seems to be permanent. For example ThingSpeak: https://it.mathworks.com/help/thingspeak/channel-settings.html#keys Is this possible with Keycloak? I.e. permanently granting access to some device?