> ## Documentation Index
> Fetch the complete documentation index at: https://docs.kodelabs.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Link child meters to a parent meter

> Makes one or more meters children of a parent meter.

> [!NOTE]
>
> The parent and every child must be meters of the building. The body must hold the same `buildingId` as the path. Sending the same link again is not an error. The response is `204` with no body.

> [!NOTE]
>
> To list the children of a meter, use the `parentMeterId` filter of [List meters](https://docs.kodelabs.com/products/kode-api/api-reference/meters/list-meters.md). To remove a link, use [Unlink a child meter](https://docs.kodelabs.com/products/kode-api/api-reference/meters/unlink-a-child-meter.md).


## OpenAPI

````yaml /openapi/kode-api.yaml post /api/v1/buildings/{buildingId}/meters/references
openapi: 3.1.0
info:
  title: KODE API
  version: 1.0.0
  summary: Programmatic access to KODE OS resources and operations.
  description: >
    Use the KODE API to work with buildings, data sources, connectors, devices,
    points, virtual devices,

    timeseries data, schedules, the ontology, templating, mass writes, spaces,
    space assignments, tenants, meters, users, actions,

    and AssetOps work orders.
  license:
    name: Proprietary
    identifier: LicenseRef-Proprietary
servers:
  - url: https://api.kodelabs.com/kodeos
    description: KODE API
security:
  - bearerAuth: []
tags:
  - name: Authentication
    description: OAuth 2.0 discovery, token, and revocation endpoints.
  - name: Buildings
    description: Buildings and their areas.
  - name: Data sources
    description: Data sources connected to a building.
  - name: Devices
    description: Devices and their points.
  - name: Points
    description: Point queries and point writes.
  - name: Timeseries
    description: Current and historical point values.
  - name: Actions
    description: Actions exposed by building data sources.
  - name: Work orders
    description: AssetOps work orders, lookups, comments, and attachments.
  - name: Connectors
    description: KODE API connectors and the devices and points ingested through them.
  - name: Schedules
    description: Schedules discovered on building data sources.
  - name: Templating
    description: Apply ontology templates to groups of points.
  - name: Virtual devices
    description: Virtual devices that group points from other devices.
  - name: Ontology
    description: Canonical types, fields, units, and connections of the KODE ontology.
  - name: Users
    description: Users of the organization and their app access.
  - name: Mass write
    description: Write values to many points across buildings, and follow each run.
  - name: Spaces
    description: Levels and space units of a building, and the meters located in them.
  - name: Space assignments
    description: Assign tenants to leasable spaces of a building for a period.
  - name: Tenants
    description: Tenants of a building, the people or companies that lease its spaces.
  - name: Meters
    description: >-
      Meters of a building, their space assignments, parent and child links, and
      readings.
paths:
  /api/v1/buildings/{buildingId}/meters/references:
    post:
      tags:
        - Meters
      summary: Link child meters to a parent meter
      description: Makes one or more meters children of a parent meter.
      operationId: createMeterReferences
      parameters:
        - $ref: '#/components/parameters/BuildingId'
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateMeterReferenceRequest'
        required: true
      responses:
        '204':
          description: The meters were linked. The response has no body.
        '400':
          description: >-
            A required field is missing or blank, `childMeterIds` is empty or
            has the wrong type, a meter does not exist in the building, or
            `buildingId` in the body is not the building in the path.
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          description: >-
            The building does not exist or is not assigned to the service
            account. KODE API answers `403` in both cases so that building ids
            cannot be probed.
        '429':
          $ref: '#/components/responses/TooManyRequests'
components:
  parameters:
    BuildingId:
      name: buildingId
      in: path
      required: true
      description: Building identifier from List buildings.
      schema:
        type: string
      example: 67c960faffaa42223163099e
  schemas:
    CreateMeterReferenceRequest:
      type: object
      required:
        - buildingId
        - parentMeterId
        - childMeterIds
      properties:
        buildingId:
          description: >-
            Identifier of the building. Use the same building as in the path.
            Required.
          type: string
          pattern: \S
        parentMeterId:
          description: Identifier of the parent meter. Required.
          type: string
          pattern: \S
        childMeterIds:
          description: >-
            Identifiers of the child meters. At least one. All meters must be in
            this building. Required.
          type: array
          items:
            type: string
          minItems: 1
  responses:
    Unauthorized:
      description: The access token is missing, invalid, or expired. Request a new token.
    TooManyRequests:
      description: >-
        A rate-limit window is exhausted. Wait, then retry with increasing
        delays.
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      bearerFormat: JWT
      description: >
        Paste an access token from [Create an access
        token](/products/kode-api/api-reference/authentication/create-an-access-token).
        Tokens expire, so request a new one if you receive `401`.

````

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