When using the API key generated for my project from Google developer console in the server side to send GCM - Push notifications, i am getting a 'MismatchSenderId' error. I have cross checked the sender ID in my application and the API key also, which is correct.
Also when creating an API key for push notification implementation, should i go for 'Server key' or 'Browser key' or 'Android key' .I have maps implementation also in my project. I am new to push notification implementation, so kindly excuse if question is too broad.