On the wire
Ships with HTTP status 404, carrying "code": "RU-3008" in the response body alongside the human-readable error message. Existing fields are never replaced by the code: it is additive.
Common causes
- The channel was deleted.
- The ID was copied from another account or mistyped.
How to fix it
- List your channels with GET /notification-channels and use an ID from the response.
Related codes
- RU-3007: Invalid notification channel request
Still stuck?
Ask support and mention RU-3008: the code pins down the exact refusal path, so you skip the diagnostic back-and-forth.