The IP allowlist (whitelist) enables you to restrict API calls to only accept specific IP addresses for each API key. Only allowing access to a select number of IP addresses can lower the chances of a security threat or malicious attack.
If you have workspace owner permissions, you can follow these instructions on the Help Center to add IP addresses to the allowlist.
Alternatively, you can also submit a ticket to Fireblocks Support with the IP addresses of the machines running your API client(s) and their matching API key(s).