When i use the following Curl command in Terminal on Mac:
curl "https://api-free.deepl.com/v2/glossaries" \
--header "Authorization: DeepL-Auth-Key 0c9649a5-e8f6-632a-9c42-a9eee160c330:fx" \
--data-urlencode "name=My Glossary" \
-d "source_lang=en" \
-d "target_lang=de" \
--data-urlencode "entries=Hello! Guten Tag!" \
-d "entries_format=tsv"
I get the following Error: {"message":"Bad request","detail":"Missing or invalid argument: entries_format"}
But this is an example Request on der Documentation, so it should work.