# CIMD Registration Failed Event

Learn about the CIMD Registration Failed event.

> For the index of this section of the site, see [llms.txt](https://fusionauth.io/docs/llms.txt)

## CIMD Registration Failed

> **PLAN:** This feature requires [an Enterprise plan](https://fusionauth.io/docs/get-started/core-concepts/plans-features.md#enterprise-features).

Available since `1.70.0`

This event is generated when FusionAuth can't register a CIMD client or update its registration. FusionAuth also writes an Error entry to the Event Log for each failure.

Event type

cimd.registration.failed

### Event Scope

This is a tenant-scoped event.

It can be sent to all tenants or to one or more specified tenants. However, those tenants will not be sent events for other tenants, but only events related to themselves.

### Transaction Compatibility

This event is non-transactional. The operation will succeed regardless of the webhook response status code.

See [OAuth Client Registration](https://fusionauth.io/docs/lifecycle/authenticate-users/oauth/client-registration.md#client-id-metadata-documents) for how FusionAuth registers CIMD clients.

A failed fetch doesn't always fail the login. During the CIMD domain's [grace period](https://fusionauth.io/docs/lifecycle/authenticate-users/oauth/cimd-registration-lifecycle.md#the-grace-period), FusionAuth keeps using the expired registration, but still sends this event with the reason `metadataRetrievalFailed`.

### Event Body

`event.cimdDomainId`

*   Type: `UUID`

The unique Id of the [CIMD domain](https://fusionauth.io/docs/get-started/core-concepts/types/cimd-domains.md) that matched the client's `client_id` URL. Absent when no CIMD domain matched.

`event.clientId`

*   Type: `String`

The client's `client_id` URL.

`event.createInstant`

*   Type: `Long`

The [instant](https://fusionauth.io/docs/reference/data-types.md#instants) that the event was generated.

`event.id`

*   Type: `UUID`

The unique Id of the event. You may receive an event more than once based upon your transaction settings. This Id may be used to identify a duplicate event.

`event.info.data`

*   Type: `Object`

An object that can hold any information about the event that should be persisted.

`event.info.deviceDescription`

*   Type: `String`

The description of the device associated with the event.

`event.info.deviceName`

*   Type: `String`

The device name associated with the event.

`event.info.deviceType`

*   Type: `String`

The type of device associated with the event.

`event.info.ipAddress`

*   Type: `String`

The source IP address of the event.

`event.info.location.city`

*   Type: `String`

The city where the event originated.

**Enterprise plan** To use event location data, you'll need [an Enterprise plan](https://fusionauth.io/docs/get-started/core-concepts/plans-features.md#enterprise-features).

`event.info.location.country`

*   Type: `String`

The country where the event originated.

**Enterprise plan** To use event location data, you'll need [an Enterprise plan](https://fusionauth.io/docs/get-started/core-concepts/plans-features.md#enterprise-features).

`event.info.location.latitude`

*   Type: `Double`

The latitude where the event originated.

**Enterprise plan** To use event location data, you'll need [an Enterprise plan](https://fusionauth.io/docs/get-started/core-concepts/plans-features.md#enterprise-features).

`event.info.location.longitude`

*   Type: `Double`

The longitude where the event originated.

**Enterprise plan** To use event location data, you'll need [an Enterprise plan](https://fusionauth.io/docs/get-started/core-concepts/plans-features.md#enterprise-features).

`event.info.location.region`

*   Type: `String`

The geographic location where the event originated.

**Enterprise plan** To use event location data, you'll need [an Enterprise plan](https://fusionauth.io/docs/get-started/core-concepts/plans-features.md#enterprise-features).

`event.info.location.zipcode`

*   Type: `String`

The zip code where the event originated.

**Enterprise plan** To use event location data, you'll need [an Enterprise plan](https://fusionauth.io/docs/get-started/core-concepts/plans-features.md#enterprise-features).

`event.info.os`

*   Type: `String`

The operating system associated with the event.

`event.info.userAgent`

*   Type: `String`

The user agent associated with the event.

`event.reason.code`

*   Type: `String`

Why the registration failed. The possible values are:

*   `lambdaRejected` - The [CIMD client registration lambda](https://fusionauth.io/docs/extend/code/lambdas/cimd-client-registration.md) returned a `DENY` or `REVOKE` decision, or failed.
*   `metadataRetrievalFailed` - FusionAuth couldn't fetch or validate the client's metadata document.
*   `rateLimited` - The user exceeded the Tenant's rate limit for registering new CIMD clients.

`event.resource`

*   Type: `String`

The `resource` the client requested.

`event.tenantId`

*   Type: `UUID`

The unique Id of the Tenant.

`event.type`

*   Type: `String`

The event type. This value is always `cimd.registration.failed`.

Example Event JSON

```json
{
  "event": {
    "cimdDomainId": "3c1f9a2b-7d4e-4b6a-9c8d-1e2f3a4b5c6d",
    "clientId": "https://app.example.com/oauth/client.json",
    "createInstant": 1792680000123,
    "id": "9b1e3d5f-7a2c-4e6b-8d0f-1a3c5e7b9d2f",
    "info": {
      "ipAddress": "203.0.113.42",
      "userAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.0 Safari/605.1.15"
    },
    "reason": {
      "code": "lambdaRejected"
    },
    "resource": "https://mcp.example.com/mcp",
    "tenantId": "30663132-6464-6665-3032-326466613934",
    "type": "cimd.registration.failed"
  }
}
```

Related

[Extend CIMD Registration Success Event Learn about the CIMD Registration Success event. cimd eventcimd webhookclient id metadata document](https://fusionauth.io/docs/extend/events-and-webhooks/events/cimd/cimd-registration-success.md)

[Extend CIMD Client Registration Lambda An overview of the CIMD client registration lambda. client id metadata document](https://fusionauth.io/docs/extend/code/lambdas/cimd-client-registration.md)

[Extend Audit Log Create Event Learn about the Audit Log Create event. webhook event](https://fusionauth.io/docs/extend/events-and-webhooks/events/audit-log-create.md)

[Extend Entity Create Event Learn about the Entity Create event. webhook event](https://fusionauth.io/docs/extend/events-and-webhooks/events/entity/entity-create.md)
---

## Other pages in Cimd

> For the full index of this section, see [Extend](https://fusionauth.io/docs/llms-extend.txt).

- [CIMD Registration Success Event](https://fusionauth.io/docs/extend/events-and-webhooks/events/cimd/cimd-registration-success.md): Learn about the CIMD Registration Success event.