> For the complete documentation index, see [llms.txt](https://docs.zenlytic.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.zenlytic.com/developers/api-reference/error-responses.md).

# Error Responses

Errors set `meta.status` to `"error"` and populate `meta.errors` with one entry per problem:

```json
{
  "meta": {
    "status": "error",
    "errors": [
      {
        "message": "Workspace not found",
        "status_code": 404,
        "error_code": "not_found",
        "occurred_at": "2026-08-05T12:00:00Z"
      }
    ],
    "warnings": []
  }
}
```

{% hint style="warning" %}
`occurred_at`, `error_code`, and `error_metadata` are optional and may be `null` — key off `status_code` and `message` first.
{% endhint %}

| Code  | Meaning               | When it happens                                                                                                                                                                                                                                                                                                                        |
| ----- | --------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `400` | Bad Request           | An application-level validation rule failed — not a schema/type error, but a business rule (e.g. a value out of range, an inferred setting with no valid value).                                                                                                                                                                       |
| `401` | Invalid token         | The bearer token fails gateway-level verification — wrong issuer/key-id, wrong signing algorithm, bad signature, failed claims, or an empty subject.                                                                                                                                                                                   |
| `403` | Forbidden             | Any authentication or authorization failure — missing/invalid credential, a PAT used against a workspace outside its scope, insufficient permission, or a `workspace_id`/`group_id`/etc. that doesn't exist or isn't visible to this token. These deliberately share one generic message — the API does not reveal which case applies. |
| `404` | Not Found             | A specific named resource wasn't found within a scope you can otherwise access — distinct from the 403 case above, which covers the *scope itself* (e.g. the `workspace_id`) being inaccessible. Also returned for a request path that doesn't match any route.                                                                        |
| `405` | Method Not Allowed    | Valid path, wrong HTTP verb (e.g. `PUT` on a route that only defines `GET`/`POST`).                                                                                                                                                                                                                                                    |
| `409` | Conflict              | Trying to create something that already exists in a way that would collide — a duplicate attribute-definition name in a workspace, an attribute already set on this group/member, or an existing group membership.                                                                                                                     |
| `422` | Unprocessable Entity  | The request itself doesn't match the expected shape — malformed JSON, a required field missing, or a field of the wrong type — caught by schema validation before any application logic runs.                                                                                                                                          |
| `429` | Too Many Requests     | Rate limit exceeded.                                                                                                                                                                                                                                                                                                                   |
| `500` | Internal Server Error | An unexpected, unhandled error. The message is always the same generic string — no internal detail is ever leaked to the client.                                                                                                                                                                                                       |


---

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