In case your webhook receiving endpoint is behind a firewall or NAT, you may need to allow traffic from Straddle’s IP addresses. This is the full list of IP addresses that webhooks may originate from grouped by the region of the sender.

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Straddle IP Addresses

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44.228.126.217
50.112.21.217
52.24.126.164
54.148.139.208
54.164.207.221
54.90.7.123
2600:1f24:64:8000::/52
2600:1f28:37:4000::/52
The list is also available as a JSON file: webhooks-ips.json.