Static Source IP Addresses
In case your webhook receiving endpoint is behind a firewall or NAT, you may need to allow traffic from Svix’s static IP addresses.
This is the full list of IP addresses that webhooks may originate from grouped by the region of the sender. The list is also available as a JSON file: webhooks-ips.json.
Regions
The list of IP addresses below is grouped by the respective Svix region. The region where webhooks are sent from is the same as the region of respective environment. This means that all webhooks in the EU region will use the EU IP addresses below, all webhooks in the US region will use the US IP addressed below, and the same for every other region.
US
44.228.126.217
50.112.21.217
52.24.126.164
54.148.139.208
2600:1f24:64:8000::/56EU
52.215.16.239
54.216.8.72
63.33.109.123
2a05:d028:17:8000::/56Australia (Private region)
13.239.204.236
54.66.246.217
54.252.65.96
2406:da2c:13:4000::/56Canada (Private region)
52.60.44.49
3.98.68.230
3.96.105.27
2600:1f21:1c:4000::/56Important
Static source IPs are not guaranteed for all pricing tiers, please refer to the pricing page for more information.
Webhook User Agent
Some systems may require to identify the User-Agent used by Svix in addition to the IP addresses. Requests from the Svix service, as well as self-hosted instances, may use different user-agent strings depending on the exact plan and configuration (usually Svix-Webhooks/{server-version} or Webhooks/{server-version}).
However, every webhook coming from the Svix hosted service (using the IP addresses above), will also include sender-9YMgn in order to enable easy identification of requests coming from the hosted service.
Frequently Asked Questions
How often do Svix’s webhook source IP addresses change?
For existing customers, the source IPs do not change. Once your account is using a given set of regional IPs, we keep that set stable so we don’t break your integration. We may add new IPs over time as we expand capacity, but those additions apply to new customers — your existing webhook sender IPs stay the same.
How much advance notice do you give before changing webhook source IPs?
We don’t change the source IPs for existing customers, so there’s no rotation schedule or change-notification process to worry about. If that ever needed to change for an exceptional reason, we would notify affected customers well in advance via email and our changelog, but in practice this has not happened.
Are static webhook source IPs available on all Svix pricing tiers?
Static source IPs are included on the Pro and Enterprise tiers. For the most up-to-date details, please refer to the pricing page .