EOP and IAU Parameters as json

Dear Cesium team,

I want to compute the ECI to RIC rotation matrix at a given time. Therefore I have to use EOP and IAU parameters matching the given time.

In Cesium you use json files containing those parameters. Usually current parameter sets are provided by public services like celestrack in plaintext formats, so do you actually have code for converting those plaintext files to json files? Do you provide current json files somewhere yourself? Why don't you use the plaintext files yourself? Is there any other option you can recommend?

Kind Regards!