Can I push to sandbox and production with the same key? Craig Conover November 19, 2020 13:48 Updated It is recommended that you use unique PubNub key set per environment along with the appropriate vendor push configuration (APNS and FCM) for each. Please review our recommendations on creating keys for each of your environments (dev, test, prod). Related articles Can my PubNub account support multiple environments? Can I send large messages via APN?