You can very easily add your Bitmex API key by following the below steps
1. Login to Mudrex> Navigate to Profile> Exchange API Keys
2. Click on 'Add Keys'
3. Log into Bitmex.com> Navigate to API> API key management
4. Click on create API key. A Page similar to below should show up
5. Please make sure you have set the Key Permissions to 'Order' only. Do not select the Withdraw option
6. Once the key is generated copy and past the key and secret into the dialog box on Mudrex
7. Add the key. On adding we will first verify if the key is correct or not. Verification should be completed within a min.
8. Once verified you can start trading directly!
In case you face any issues with key verification, pls feel free to reach out to firstname.lastname@example.org