Issue in make a phone call within Google Assistant App

Question

I try to implement button in basic card i got an error

API Version 2: Failed to parse JSON response string with \'INVALID_ARGUMENT\' error: \"(expected_i

Answer 1

The URL property that you are using includes a phonenumber. The link property can only use links to a webpage. This also comes back in the error message that you are getting:

"the protocol must be http or https.".

So if you want to fix the error, you need to include a http or https link in your button instead of a phonenumber.

As for calling a phonenumber from the Google Assistant App, I'm not sure if this feature is supported at the moment.

Answer 2

You cannot open a tel: URL through the Assistant.

As the error noted:

expected_inputs[0].input_prompt.rich_initial_prompt.items[1].basic_card.buttons[0].open_url_action: the protocol must be http or https.

Keep in mind that the Assistant runs on devices that do not support tel: URLs, even if they support https: URLs.