Hi Céline,
are you on Cloud or on Server?
With Server you can do this using the API: https://support.smartbear.com/zephyr-scale-server/api-docs/v1/ (the examples have "parameters", where they actually mean "test data" and the example for parameters is missing, but it should be possible to figure that out)
With Cloud you can also create test cases using the API, but I'm not sure about parameters. The docs don't show anything about those: https://support.smartbear.com/zephyr-scale-cloud/api-docs/#operation/createTestCase
Hope, this helps.
Cheers
Josh