Information that isn’t in the form and shouldn’t appear on the source code

Hi,

First of all thanks for this plugin, it’s great.

For my API to work I’ve to send a Token and Costumer ID, I created a field in CF7 and this info are the default info in that field, I also set that field to readonly and hidden it with CSS.

But someone that see the source code of my page can see sensible information of my API like the token and costumer ID.

So with this plugin is possible to send to the API values that aren’t on the form field?

Thank you
Regards