I am writing this on behalf of Kyle MacRitchie;
I'm wondering if it is possible to retrieve the full entry for collection metadata using a command that only uses the entryID or nativeID instead of the conceptID? The concept ID command that I have found in your documentation is of the form:
curl -H "Echo-Token: $YOURTOKEN" "https://cmr.uat.earthdata.nasa.gov:443/search/concepts/C1212614066-GES_DISC?pretty=true"
But this requires first looking up the conceptID, whereas it would be much easier if we could use the entry or native IDs, since these don’t have to be looked up.