Attachments: Up to 2 attachments (including images) can be used with a maximum of 512.0 KiB each and 1.0 MiB total.
What sort of decoder are you looking for? The request and response messages for all the API's are in JSON format, the structure of which is documented in the Swagger API.
See this article about capturing RDP interactions using a debugging proxy.
Summaries.Definition("MyRIC").GetData() not working when invoking from WindowsFrom Application
How would I able to get whole lists of the Topic code or code library from the API Playground ? I need is the list of the News Topic Code for the News In EDP.
Historical data start date issue
Elektron data platform data/news/ endpoint
Refinitiv Data Platform API connection error