Selro is integrated with Parcel2Go for shipping label creation with your Pacel2Go account via Selro. Please follow the below steps to get Parcel2Go to integrate with Selro.
Please login into your Parcel2Go account and go to 'My Settings' on top right section.
Please select Settings -> API menu.
Please click 'Create new Credentials' and enter the application URL as https://selro.com .
This will give an API key and please enter this value into Selro Parcel2Go section.