# Authentication Challenge An object representing a Challenge of an Authentication Factor. ## Challenge Factor Creates a Challenge for an Authentication Factor. #### Request #### Response ## Verify Challenge Verifies an Authentication Challenge. #### Request #### Response ### authentication_challenge | Field | Type | Required | Description | | --- | --- | --- | --- | | `object` | "authentication_challenge" | Yes | Distinguishes the Authentication Challenge object. | | `id` | string | Yes | The unique ID of the Authentication Challenge. | | `expires_at` | string | No | The timestamp when the Challenge will expire. Does not apply to totp factors. | | `code` | string | No | The one-time code for the challenge. | | `authentication_factor_id` | string | Yes | The unique ID of the Authentication Factor the Challenge belongs to. | | `created_at` | string | Yes | The timestamp when the Challenge was created. | | `updated_at` | string | Yes | The timestamp when the Challenge was last updated. | ### POST /auth/factors/{id}/challenge #### Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | `id` | string | Yes | The unique ID of the Authentication Factor to be challenged. | #### Returns | Field | Type | Description | | --- | --- | --- | | `authentication_challenge` | object | Distinguishes the authentication challenge object. | ### POST /auth/challenges/{id}/verify #### Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | `id` | string | Yes | The unique ID of the Authentication Challenge. | #### Returns | Field | Type | Description | | --- | --- | --- | | `challenge` | object | The relevant [Authentication Challenge](/reference/mfa/challenge). | | `valid` | boolean | Indicates whether the code was correct. |