GET fails if the response does not have Content-Type set

Hi @bedo2991 and welcome to the KNIME forum,

This alternative approach will work for you:

Pass the URLs to HTTP Retriever and extract the result using HTTP Result Data Extractor and finally the String to JSON node will give you the JSON you are looking for.

Here is an example workflow for you:

Palladian_Nodes_JSON.knwf (294.8 KB)