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

# Create Custom Audience

> Create a new custom audience from customer data, website visitors, app users, or other sources. Specify subtype to control the data source.



## OpenAPI

````yaml /api-reference/openapi.yaml post /meta/mcp#create_custom_audience
openapi: 3.1.0
info:
  title: Multi-Source Ads API
  version: 1.0.0
  description: >-
    Unified API for managing ad campaigns across Meta, LinkedIn, and Google. MCP
    tools are accessed via JSON-RPC 2.0 over HTTP (`POST /{source}/mcp`). Google
    Sheets/Drive endpoints use standard REST.
servers:
  - url: https://api.adside.ai
    description: Production
  - url: http://localhost:3100
    description: Local development
security:
  - bearerAuth: []
tags:
  - name: Accounts
    description: ''
  - name: Ads
    description: ''
  - name: Analytics
    description: ''
  - name: Asset Groups
    description: ''
  - name: Assets
    description: ''
  - name: Audiences
    description: ''
  - name: Campaign Groups
    description: ''
  - name: Campaigns
    description: ''
  - name: Conversions
    description: ''
  - name: Creatives
    description: ''
  - name: Drive
    description: ''
  - name: Google
    description: ''
  - name: Google Ads
    description: ''
  - name: Google Tag Manager
    description: ''
  - name: Keywords
    description: ''
  - name: Linkedin
    description: ''
  - name: Meta
    description: ''
  - name: Meta Reporting
    description: ''
  - name: OAuth
    description: ''
  - name: Other
    description: ''
  - name: Reports
    description: ''
  - name: Sheets
    description: ''
  - name: Targeting
    description: ''
  - name: Tiktok
    description: ''
  - name: Workspace
    description: ''
paths:
  /meta/mcp#create_custom_audience:
    post:
      tags:
        - Meta
        - Audiences
      summary: Create Custom Audience
      description: >-
        Create a new custom audience from customer data, website visitors, app
        users, or other sources. Specify subtype to control the data source.
      operationId: meta_create_custom_audience
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - jsonrpc
                - method
                - params
              properties:
                jsonrpc:
                  type: string
                  const: '2.0'
                id:
                  type: string
                  example: '1'
                method:
                  type: string
                  const: tools/call
                params:
                  type: object
                  required:
                    - name
                    - arguments
                  properties:
                    name:
                      type: string
                      const: create_custom_audience
                    arguments:
                      $ref: '#/components/schemas/meta_create_custom_audience_input'
      responses:
        '200':
          description: JSON-RPC response with tool result
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/McpToolResponse'
        '401':
          description: Missing or invalid API key
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '403':
          description: Channel not connected or access denied
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '429':
          description: Rate limit exceeded
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
      security:
        - bearerAuth: []
components:
  schemas:
    meta_create_custom_audience_input:
      type: object
      properties:
        account_id:
          description: Meta Ad Account ID (uses configured account if not provided)
          type: string
        name:
          type: string
          minLength: 1
          description: Custom audience name
        description:
          description: Custom audience description
          type: string
        subtype:
          type: string
          enum:
            - CUSTOM
            - WEBSITE
            - APP
            - OFFLINE_CONVERSION
            - CLAIM
            - PARTNER
            - VIDEO
            - BAG_OF_ACCOUNTS
            - STUDY_RULE_AUDIENCE
            - FOX
          description: Custom audience subtype
        customer_file_source:
          description: Customer file source
          type: string
          enum:
            - USER_PROVIDED_ONLY
            - PARTNER_PROVIDED_ONLY
            - BOTH_USER_AND_PARTNER_PROVIDED
        retention_days:
          description: Retention days for the audience
          type: number
          minimum: 1
          maximum: 180
        rule:
          description: Rule definition for the audience (depends on subtype)
      required:
        - name
        - subtype
      $schema: http://json-schema.org/draft-07/schema#
    McpToolResponse:
      type: object
      properties:
        jsonrpc:
          type: string
          const: '2.0'
        id:
          type: string
        result:
          type: object
          properties:
            content:
              type: array
              items:
                type: object
                properties:
                  type:
                    type: string
                    const: text
                  text:
                    type: string
                    description: JSON-stringified tool result
    ErrorResponse:
      type: object
      properties:
        error:
          type: string
          description: Error message
        code:
          type: string
          enum:
            - UNAUTHORIZED
            - FORBIDDEN
            - NOT_FOUND
            - RATE_LIMITED
            - INTERNAL_ERROR
          description: Error code
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
      description: >-
        API key (sk_live_*) — SHA256 hashed, looked up in Redis. Generate via
        the web app's workspace settings.

````