FlutterFlow to KNIME Integration

Hi,

I have developed an app in FlutterFlow. From this app I want to sent PDF documents into KNIME for analysis. I have not done this before. I am assuming I will have to set up an API call in FlutterFlow with a POST request. I do not know what URL should I be using in the POST request to send the PDF to KNIME. Can you experts in KNIME guide me step by step to achieve this.

Your help will be appreciated.

Thanks

Vijay Zutshi