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CMDB Meta API

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CMDB Meta API

The CMDB Meta API provides endpoints to obtain meta data on a Configuration Management Database (CMDB) class.

This API requires that the user have the ITIL role.

Parent Topic:REST API reference

CMDB Meta - GET /now/cmdb/meta/{classname}

Returns the meta data for the specified CMDB class.

URL format

Versioned URL: /api/now/{api_version}/cmdb/meta/{className}

Default URL: /api/now/cmdb/meta/{className}

Note: Available versions are specified in the REST API Explorer. For scripted REST APIs there is additional version information on the Scripted REST Service form.

Supported request parameters

Name

</th><th>

Description

</th></tr></thead><tbody><tr><td>

api_version

</td><td id=“version-entry-RESTAPI”>

Optional. Version of the endpoint to access. For example, v1 or v2. Only specify this value to use an endpoint version other than the latest. Data type: String

</td></tr><tr><td>

className

</td><td>

CMDB class name. This is the name of the table that contains the desired CI records, such as cmdb_ci_linux_server or cmdb_ci_apache_web_server.Data type: String

Name Description None

The following request and response headers apply to this HTTP action only, or apply to this action in a distinct way. For a list of general headers used in the REST API, see Supported REST API headers.

Header

</th><th>

Description

</th></tr></thead><tbody><tr><td>

</td><td id=“accept-entry-RESTAPI”>

Data format of the response body. Supported types: application/json or application/xml. Default: application/json

Status codes

The following status codes apply to this HTTP action. For a list of possible status codes used in the REST API, see REST API HTTP response codes.

Status code Description 200 Successful. The request was successfully processed. 401 Unauthorized. The user credentials are incorrect or have not been passed. 404 Not found. The requested item wasn’t found. 500 Internal server error. An unexpected error occurred while processing the request. The response contains additional information about the error.

Response body parameters (JSON or XML)

Element

</th><th>

Description

</th></tr></thead><tbody><tr><td>

attributes

</td><td>

Available fields in the specified class table. Data type: Array

</td></tr><tr><td>

children

</td><td>

List of classes extended from the specified class.Data type: Array

</td></tr><tr><td>

icon

</td><td>

Class icon sys_id.Data type: String

</td></tr><tr><td>

icon_url

</td><td>

Class icon URL. Data type: String

</td></tr><tr><td>

identification_rules

</td><td>

Attributes associated with the configuration item identification rules for the specified class. Data type: Object

</td></tr><tr><td>

is_extendable

</td><td>

Flag that indicates whether the class can be extended to create other classes.Possible values:

true: Class can be extended.
false: Class cannot be extended.

Data type: Boolean

</td></tr><tr><td>

label

</td><td>

Specified class display name.Data type: String

</td></tr><tr><td>

name

</td><td>

Table/class name.Data type: String

</td></tr><tr><td>

parent

</td><td>

Parent class.Data type: String

</td></tr><tr><td>

relationship_rules

</td><td>

Relationships between the specifed class and other classes in the CMDB. Data type: Array

</td></tr></tbody> </table>### Sample cURL request

curl "https://instance.servicenow/api/now/cmdb/meta/cmdb_ci_computer" \
--request GET \
--header "Accept:application/json" \
--user 'username':'password'

{
  "result": {
    "icon_url": "images/app.ngbsm/computer.svg",
    "is_extendable": true,
    "parent": "cmdb_ci_hardware",
    "children": [
      "cmdb_ci_ucs_blade",
      "cmdb_ci_pc_hardware",
      "cmdb_ci_ucs_rack_unit",
      "cmdb_ci_mainframe_hardware",
      "cmdb_ci_server",
      "cmdb_ci_storage_switch"
    ],
    "name": "cmdb_ci_computer",
    "icon": "c6442dd69fb00200eb3919eb552e7012",
    "attributes": [
      {
        "is_inherited": "false",
        "is_mandatory": "false",
        "is_read_only": "false",
        "default_value": null,
        "label": "OS Address Width (bits)",
        "type": "integer",
        "element": "os_address_width",
        "max_length": "40",
        "is_display": "false"
      },
      {
        "is_inherited": "true",
        "is_mandatory": "false",
        "is_read_only": "true",
        "default_value": "false",
        "label": "Skip sync",
        "type": "boolean",
        "element": "skip_sync",
        "max_length": "40",
        "is_display": "false"
      },
      {
        "is_inherited": "true",
        "is_mandatory": "false",
        "is_read_only": "false",
        "default_value": null,
        "label": "DNS Domain",
        "type": "string",
        "element": "dns_domain",
        "max_length": "255",
        "is_display": "false"
      },
      {
        "is_inherited": "true",
        "is_mandatory": "false",
        "is_read_only": "false",
        "default_value": null,
        "label": "Purchased",
        "type": "glide_date",
        "element": "purchase_date",
        "max_length": "40",
        "is_display": "false"
      },
      {
        "is_inherited": "true",
        "is_mandatory": "false",
        "is_read_only": "false",
        "default_value": null,
        "label": "Lease contract",
        "type": "string",
        "element": "lease_id",
        "max_length": "40",
        "is_display": "false"
      }
    ],
    "relationship_rules": [
      {
        "parent": "cmdb_ci_computer",
        "relation_type": "cb5592603751200032ff8c00dfbe5d17",
        "child": "dscy_route_next_hop"
      },
      {
        "parent": "cmdb_ci_computer",
        "relation_type": "cb5592603751200032ff8c00dfbe5d17",
        "child": "dscy_router_interface"
      },
      {
        "parent": "cmdb_ci_computer",
        "relation_type": "cb5592603751200032ff8c00dfbe5d17",
        "child": "dscy_route_interface"
      },
      {
        "parent": "cmdb_ci_computer",
        "relation_type": "55c95bf6c0a8010e0118ec7056ebc54d",
        "child": "cmdb_ci_storage_pool"
      },
      {
        "parent": "cmdb_ci_computer",
        "relation_type": "55c95bf6c0a8010e0118ec7056ebc54d",
        "child": "cmdb_ci_disk_partition"
      },
      {
        "parent": "cmdb_ci_computer",
        "relation_type": "55c95bf6c0a8010e0118ec7056ebc54d",
        "child": "cmdb_ci_storage_volume"
      },
      {
        "parent": "cmdb_ci_computer",
        "relation_type": "55c95bf6c0a8010e0118ec7056ebc54d",
        "child": "cmdb_ci_storage_device"
      }
    ],
    "label": "Computer",
    "identification_rules": {
      "related_rules": [
        {
          "condition": "",
          "exact_count_match": false,
          "referenced_field": "installed_on",
          "active": true,
          "attributes": "name",
          "allow_fallback": false,
          "table": "cmdb_print_queue_instance",
          "order": 100,
          "allow_null_attribute": false
        }
      ],
      "applies_to": "cmdb_ci_hardware",
      "identifiers": [
        {
          "condition": "valid=true^absent=false^EQ",
          "exact_count_match": true,
          "referenced_field": "cmdb_ci",
          "active": true,
          "attributes": "serial_number,serial_number_type",
          "allow_fallback": false,
          "table": "cmdb_serial_number",
          "order": 100,
          "allow_null_attribute": false
        },
        {
          "condition": null,
          "exact_count_match": false,
          "referenced_field": null,
          "active": true,
          "attributes": "serial_number",
          "allow_fallback": false,
          "table": null,
          "order": 200,
          "allow_null_attribute": false
        },
        {
          "condition": null,
          "exact_count_match": false,
          "referenced_field": null,
          "active": true,
          "attributes": "name",
          "allow_fallback": false,
          "table": null,
          "order": 300,
          "allow_null_attribute": false
        },
        {
          "condition": "install_status!=100^EQ",
          "exact_count_match": true,
          "referenced_field": "cmdb_ci",
          "active": true,
          "attributes": "ip_address,mac_address",
          "allow_fallback": false,
          "table": "cmdb_ci_network_adapter",
          "order": 400,
          "allow_null_attribute": false
        }
      ],
      "name": "Hardware Rule",
      "description": "Identifier for hardware.",
      "active": true,
      "is_independent": true
    }
  }
}

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CMDB Meta API

CMDB Meta - GET /now/cmdb/meta/{classname}

URL format

Supported request parameters

Headers

Status codes

Response body parameters (JSON or XML)

Keep exploring.