In order to list your receiver on sdr.hu, you will need to register.

After submitting the form, you will get an e-mail containing a unique key. You will have to copy, and paste this key into the sdrhu_key setting in config_webrx.py in your OpenWebRX installation.

Note: you only need to do this if you want to get your receiver listed publicly on sdr.hu. Setting up your own OpenWebRX server for private use, or listening to the online receivers listed on sdr.hu does not require registration.