Can apple push notifications send more parameters than alert and sound?

Question

I have several pieces of metadata that I need to associate with a push notification.

For example user no, message id.

Can I send more parameters than what ap

Answer 1

You are not allowed to put custom tags inside aps tag. Here's what documentations says about it:

Providers can specify custom payload values outside the Apple-reserved aps namespace. Custom values must use the JSON structured and primitive types: dictionary (object), array, string, number, and Boolean.

So in your case you should do something like:

{
    "aps": {
        "alert": "Hello Push",
        "sound": "default"
    },
    "People": {
        "Address": "Your address here",
        "Name": "Your Name here",
        "Number": "XXXXXXXXXX"
    }
}

Therefore you can read your custom payload with looking for it's key in main JSON, rather than in "aps":