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OpenAPI Specification

openapi: 3.2.0
info:
  title: LinkedIn Marketing Audience Counts API
  description: 'Partial OpenAPI 3.1 representation of the LinkedIn Marketing API for

    advertising, campaign management, audience targeting, and reporting. Uses

    OAuth 2.0 three-legged (authorization code) flow and requires a

    `LinkedIn-Version` header in YYYYMM format on every versioned request.

    Reference documentation lives at

    https://learn.microsoft.com/en-us/linkedin/marketing/.'
  version: '2026.05'
  contact:
    name: LinkedIn Marketing API Program
    url: https://learn.microsoft.com/en-us/linkedin/marketing/
servers:
- url: https://api.linkedin.com/rest
  description: Versioned REST endpoint.
security:
- OAuth2:
  - rw_ads
tags:
- name: Audience Counts
paths:
  /audienceCounts:
    get:
      summary: Estimate audience count
      operationId: getAudienceCounts
      security:
      - OAuth2:
        - r_ads
        - rw_ads
      parameters:
      - $ref: '#/components/parameters/LinkedInVersion'
      - name: q
        in: query
        required: true
        schema:
          type: string
          enum:
          - targetingCriteria
      responses:
        '200':
          description: Audience count results.
      tags:
      - Audience Counts
components:
  parameters:
    LinkedInVersion:
      name: LinkedIn-Version
      in: header
      required: true
      description: API version in `YYYYMM` format, e.g. `202605`.
      schema:
        type: string
        pattern: ^\d{6}$
  securitySchemes:
    OAuth2:
      type: oauth2
      description: OAuth 2.0 three-legged (authorization code) flow.
      flows:
        authorizationCode:
          authorizationUrl: https://www.linkedin.com/oauth/v2/authorization
          tokenUrl: https://www.linkedin.com/oauth/v2/accessToken
          scopes:
            r_ads: Read ads accounts, campaigns, and creatives.
            rw_ads: Read and write ads accounts, campaigns, and creatives.
            r_ads_reporting: Read ad campaign reporting data.
            r_basicprofile: Read basic profile.