There are a few API operations that requires a manual upgrade of your API key. This is one of them. We handle those things via support so you can safely do what the error message says and contact support. Please provide:
The client id of the API key they are using
The email of the Podio user who owns that API key
The name(s) of the specific API call(s) where they are planning to use with the increased trust level
A detailed description of their integration and why they need the increased trust level.
Please note we only provide the increased trust level for partners and customers we know and trust. We will not provide 2nd level access for everyone.
//Sara - Podio