GET /api/users/:id, more info:

MANDATORY TYPE Description Example (with URL)
yes integer User uniq ID /api/users/8

Result example:

JSON – output

{
    "id": 4439,
    "first_name": "John",
    "last_name": "Doe",
    "email": "modulis@test.com",
    "vm_new_message": null,
    "vm_old_message": null,
    "vm_saved_message": null,
    "profile_name": "profile name",
    "realm_id": 761,
    "language": "fr",
    "department_id": null,
    "profile_id": 161,
    "session_token": "T9soF7k3yCHyGRpdWc2v7w",
    "exclude_from_directory": false,
    "realm": "test.modulis.clusterpbx.ca",
    "dnd_status": "0",
    "forward_status": null,
    "followmeprompt": null,
    "followme_delay": null,
    "is_trunk": "0",
    "enable_call_panel": null,
    "followme_timeout": null,
    "followme_status": "",
    "callwaiting_status": "1",
    "clid_name_external": null,
    "clid_num_external": null,
    "username": null,
    "model": 4,
    "prov_tmpl": 507,
    "status": true,
    "subscriber": "111",
    "vm_email": "modulis@test.com",
    "mac": "0004f21748b2",
    "vm_box": "111",
    "buttons": [
        {
            "button_id": 1,
            "action_id": 0,
            "value": "111"
        },
        {
            "button_id": 2,
            "action_id": 0,
            "value": "111"
        },
        {
            "button_id": 3,
            "action_id": 3,
            "value": null
        }
    ],
    "expansion_pack_buttons": [],
    "macs": [
        {
            "mac": {
                "created_at": "2016-03-29T12:29:48-04:00",
                "deleted_at": null,
                "device_model_id": 4,
                "id": 3479,
                "mac": "0004f21748b2",
                "provisioning_template_id": 507,
                "sccp_addon": "",
                "updated_at": "2017-02-21T10:59:57-05:00"
            },
            "mac_clone": {
                "created_at": "2016-03-29T12:29:48-04:00",
                "deleted_at": null,
                "device_model_id": 4,
                "id": 3479,
                "mac": "0004f21748b2",
                "provisioning_template_id": 507,
                "sccp_addon": "",
                "updated_at": "2017-02-21T10:59:57-05:00"
            }
        }
    ],
    "provisioning_urls": [
        "0004f21748b2-reg.cfg"
    ],
    "device_model": "IP301/IP321/IP330/IP331/IP335",
    "device_vendor": "Polycom",
    "language_name": "French",
    "custom_prov_tmpl": null,
    "disallow_clid_override": "0",
    "disabled_directmedia": 0,
    "is_direct_media_enable": false,
    "is_voicemailbox_enabled": true,
    "voicemail_destination": "",
    "email_vm_to_email": "test@test.com",
    "attach": "yes",
    "custom_deletevoicemail": "no",
    "pagerdest": "",
    "web_email_as_vm_to_email": "no",
    "multiple_vm_to_watch": ""
}

Example: