# E27xxx — Inbox Insights

Error codes in the `E27xxx` range that the public Bird API returns. Each code links to its own page (the page its `doc_url` points at) with the cause and what to do. Retired codes stay listed; they are never renamed or reused.

| Code                                | Name                                 | Status | Message                                                       |
| ----------------------------------- | ------------------------------------ | ------ | ------------------------------------------------------------- |
| [`E27000`](/docs/api/errors/E27000) | `InboxInsightsDomainNotFound`        | `404`  | This workspace has no verified sending domain with this name. |
| [`E27002`](/docs/api/errors/E27002) | `InboxInsightsUnavailable`           | `503`  | Inbox Insights is not available right now.                    |
| [`E27003`](/docs/api/errors/E27003) | `InboxInsightsPanelUnavailable`      | `503`  | The inbox measurement panel could not be reached.             |
| [`E27005`](/docs/api/errors/E27005) | `InboxInsightsDomainNotMeasured`     | `412`  | Inbox Insights is not measuring this sending domain yet.      |
| [`E27007`](/docs/api/errors/E27007) | `InboxInsightsMonitoringUnavailable` | `503`  | Inbox Insights could not start measuring this sending domain. |

## Related

- [Errors](/docs/api/errors): the full wire contract, status mapping, and all code ranges
- [Error handling](/docs/guides/errors): branching on `type` and `code`, validation details, and `vendor_code`

## Related resources

- [Should I use a Bird SDK or call the API directly?](/explained/platform/should-i-use-an-sdk-or-call-the-api-directly) (answer)
- [Build your first integration](/learn/paths/integration) (course)
- [Send your first email](/docs/get-started/send-your-first-email) (docs)

[Get an implementation brief](/learn/workspace?topic=api-basics)