Method 1: IP Allowlisting
IP allowlisting limits incoming webhook requests to Fireblocks-owned IP addresses. It provides an additional method of defense against unsolicited traffic, but should always be combined with cryptographic verification and not relied on as a standalone control.
Webhook V2 IP Addresses
| Environment | IP Address |
|---|---|
| US Production | 3.135.57.98 |
| EU Production | 63.179.12.78 |
| EU2 Production | 3.77.138.100 |
| Sandbox | 18.117.207.128 |
⚠️ Webhooks V2 uses different IPs than V1. Update your allowlists when migrating.