webhook_endpoint.address_not_allowed

The host resolves only to blocked addresses. Checked on save and enable; at send time the same check fails the attempt (blocked_address) instead. Not applied to an exact development origin.

Code	`webhook_endpoint.address_not_allowed`
HTTP status	422
Category	`Unprocessable`
Arguments	`hostName`

What the portals show

The portals translate the code, never the title. The English (en-GB) message, in ICU format with the arguments as placeholders:

{hostName} resolves only to private or reserved addresses, which cannot receive webhooks.

Example response

application/problem+json

{
  "type": "https://docs.test.konsolutelab.uk/errors/webhook_endpoint.address_not_allowed",
  "title": "…",
  "status": 422,
  "code": "webhook_endpoint.address_not_allowed",
  "args": {},
  "traceId": "00-4bf92f3577b34da6a3ce929d0e0e4736-00f067aa0ba902b7-01",
  "instance": "/api/v1/…"
}

Handling it

Branch on code, not on title or the status alone, and log traceId. Codes are stable; new codes may appear, so fall back on the HTTP status for a code you do not know. See Handling errors and the list of codes.