---
title: notice
description: An unhandled error captured by a Honeybadger client. Notices with the same root cause are grouped under one fault_id.
url: https://docs.honeybadger.io/insights/event-types/honeybadger/notice/
---

An unhandled error captured by a Honeybadger client. Notices with the same root cause are grouped under one fault\_id.

Category **Errors** Fields **37** honeybadger

## Fields

| Field                        | Type           | Description                                                                                                                                                                                                                     |
| ---------------------------- | -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `event_type`                 | string         | Allowed value: `notice`.                                                                                                                                                                                                        |
| `uuid`                       | string         | Stable per-notice token (use to look up a specific notice in the UI).                                                                                                                                                           |
| `ulid`                       | string         | ULID for the notice. It is sortable and encodes the receive timestamp.                                                                                                                                                          |
| `fault_id`                   | integer        | Aggregated error group ID. Each fault\_id groups notices that share a root cause.                                                                                                                                               |
| `project_id`                 | integer        | Project the notice belongs to.                                                                                                                                                                                                  |
| `klass`                      | string         | Error class name, e.g. "NoMethodError", "ActiveRecord::RecordNotFound".                                                                                                                                                         |
| `message`                    | string         | Error message text from the exception.                                                                                                                                                                                          |
| `file`                       | string         | Top-frame source file from the backtrace.                                                                                                                                                                                       |
| `hostname`                   | string         | Hostname of the server that reported the error.                                                                                                                                                                                 |
| `environment`                | string         | Deploy environment, e.g. "production", "staging".                                                                                                                                                                               |
| `revision`                   | string         | Source revision (commit SHA) the app was running at.                                                                                                                                                                            |
| `user`                       | string         | Resolved from the project's user-search field (typically email or user\_id).                                                                                                                                                    |
| `request_id`                 | string         | Per-request correlation id.                                                                                                                                                                                                     |
| `tags`                       | array\<string> | Tags applied to the notice.                                                                                                                                                                                                     |
| `request`                    | object         | HTTP request metadata from the error context.                                                                                                                                                                                   |
| `request.url`                | string         |                                                                                                                                                                                                                                 |
| `request.referer`            | string         |                                                                                                                                                                                                                                 |
| `request.host`               | string         |                                                                                                                                                                                                                                 |
| `request.request_method`     | string         |                                                                                                                                                                                                                                 |
| `request.remote_addr`        | string         |                                                                                                                                                                                                                                 |
| `user_agent`                 | object         | Parsed user-agent from the request.                                                                                                                                                                                             |
| `user_agent.browser`         | object         |                                                                                                                                                                                                                                 |
| `user_agent.browser.name`    | string         |                                                                                                                                                                                                                                 |
| `user_agent.browser.major`   | string         |                                                                                                                                                                                                                                 |
| `user_agent.browser.version` | string         |                                                                                                                                                                                                                                 |
| `user_agent.os`              | object         |                                                                                                                                                                                                                                 |
| `user_agent.os.name`         | string         |                                                                                                                                                                                                                                 |
| `user_agent.os.version`      | string         |                                                                                                                                                                                                                                 |
| `user_agent.device`          | object         |                                                                                                                                                                                                                                 |
| `user_agent.device.model`    | string         |                                                                                                                                                                                                                                 |
| `user_agent.bot`             | boolean        |                                                                                                                                                                                                                                 |
| `context`                    | object         | Context data your application set when the error was reported, such as values from Honeybadger.context. Keys are whatever your code sends. Common examples include context.user\_email, context.user\_id, and context.username. |
| `context.*`                  | any            | Additional caller-defined keys.                                                                                                                                                                                                 |
| `session`                    | object         | The HTTP session at the time of the error. Keys are whatever your application stores in the session.                                                                                                                            |
| `session.*`                  | any            | Additional caller-defined keys.                                                                                                                                                                                                 |
| `params`                     | object         | The HTTP request parameters at the time of the error. Keys depend on the request.                                                                                                                                               |
| `params.*`                   | any            | Additional caller-defined keys.                                                                                                                                                                                                 |

## Example

```json
{
  "event_type": "notice",
  "uuid": "3e6c9a1d-7f2b-4e8a-b5c3-9d0e1f2a3b4c",
  "ulid": "01JXF7Q2M3N4P5R6S7T8V9W0XA",
  "fault_id": 84512937,
  "project_id": 12345,
  "klass": "ActiveRecord::RecordNotFound",
  "message": "Couldn't find User with 'id'=123",
  "file": "app/controllers/users_controller.rb",
  "hostname": "web-1.example.com",
  "environment": "production",
  "revision": "a3f8c12d9b4e6f7a8c01d2e3f4a5b6c7d8e9f0a1",
  "user": "user@example.com",
  "request_id": "1f9f6f1a-2b3c-4d5e-8f6a-7b8c9d0e1f2a",
  "tags": [
    "billing",
    "critical"
  ],
  "request": {
    "url": "https://www.example.com/users/123",
    "referer": "https://www.example.com/users",
    "host": "www.example.com",
    "request_method": "GET",
    "remote_addr": "203.0.113.42"
  },
  "user_agent": {
    "browser": {
      "name": "Chrome",
      "major": "126",
      "version": "126.0.0.0"
    },
    "os": {
      "name": "Mac OS X",
      "version": "10.15.7"
    },
    "device": {
      "model": "Mac"
    },
    "bot": false
  },
  "context": {
    "user_id": 123,
    "user_email": "user@example.com",
    "plan": "pro"
  },
  "session": {
    "session_id": "9d0e1f2a3b4c5d6e",
    "cart_items": 2
  },
  "params": {
    "controller": "users",
    "action": "show",
    "id": "123"
  }
}
```

---

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