openapi: 3.1.0
info:
  title: Mixpanel Annotations API
  description: >-
    API for creating, retrieving, updating, and deleting annotations
    that label specific points in time on Mixpanel charts with descriptions,
    useful for marking product launches, campaigns, or data anomalies.
  version: '1.0'
  contact:
    name: Mixpanel Support
    email: support@mixpanel.com
    url: https://mixpanel.com/get-support
  termsOfService: https://mixpanel.com/legal/terms-of-use
externalDocs:
  description: Mixpanel Annotations API Documentation
  url: https://developer.mixpanel.com/reference/create-annotation
servers:
  - url: https://mixpanel.com/api/app
    description: Mixpanel US Data Residency
  - url: https://eu.mixpanel.com/api/app
    description: Mixpanel EU Data Residency
tags:
  - name: Annotations
    description: Manage chart annotations for time-based markers
security:
  - basicAuth: []
paths:
  /projects/{projectId}/annotations:
    get:
      operationId: listAnnotations
      summary: Mixpanel List annotations
      description: >-
        Retrieve all annotations for a project within an optional date range.
      tags:
        - Annotations
      parameters:
        - $ref: '#/components/parameters/projectId'
        - name: from_date
          in: query
          schema:
            type: string
            format: date
          description: Start date filter (YYYY-MM-DD)
        - name: to_date
          in: query
          schema:
            type: string
            format: date
          description: End date filter (YYYY-MM-DD)
      responses:
        '200':
          description: List of annotations
          content:
            application/json:
              schema:
                type: object
                properties:
                  results:
                    type: array
                    items:
                      $ref: '#/components/schemas/Annotation'
        '401':
          description: Unauthorized
    post:
      operationId: createAnnotation
      summary: Mixpanel Create annotation
      description: >-
        Create a new annotation to mark a specific point in time on
        Mixpanel charts.
      tags:
        - Annotations
      parameters:
        - $ref: '#/components/parameters/projectId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateAnnotationRequest'
      responses:
        '200':
          description: Annotation created
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Annotation'
        '400':
          description: Invalid request
        '401':
          description: Unauthorized
  /projects/{projectId}/annotations/{annotationId}:
    get:
      operationId: getAnnotation
      summary: Mixpanel Get annotation
      description: >-
        Retrieve a specific annotation by ID.
      tags:
        - Annotations
      parameters:
        - $ref: '#/components/parameters/projectId'
        - $ref: '#/components/parameters/annotationId'
      responses:
        '200':
          description: Annotation details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Annotation'
        '401':
          description: Unauthorized
        '404':
          description: Annotation not found
    put:
      operationId: updateAnnotation
      summary: Mixpanel Update annotation
      description: >-
        Update an existing annotation's date or description.
      tags:
        - Annotations
      parameters:
        - $ref: '#/components/parameters/projectId'
        - $ref: '#/components/parameters/annotationId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreateAnnotationRequest'
      responses:
        '200':
          description: Annotation updated
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Annotation'
        '400':
          description: Invalid request
        '401':
          description: Unauthorized
        '404':
          description: Annotation not found
    delete:
      operationId: deleteAnnotation
      summary: Mixpanel Delete annotation
      description: >-
        Delete an annotation by ID.
      tags:
        - Annotations
      parameters:
        - $ref: '#/components/parameters/projectId'
        - $ref: '#/components/parameters/annotationId'
      responses:
        '200':
          description: Annotation deleted
        '401':
          description: Unauthorized
        '404':
          description: Annotation not found
components:
  securitySchemes:
    basicAuth:
      type: http
      scheme: basic
      description: >-
        Service account credentials for API authentication.
  parameters:
    projectId:
      name: projectId
      in: path
      required: true
      schema:
        type: integer
      description: The Mixpanel project ID
    annotationId:
      name: annotationId
      in: path
      required: true
      schema:
        type: integer
      description: The annotation ID
  schemas:
    Annotation:
      type: object
      properties:
        id:
          type: integer
          description: Unique annotation identifier
        date:
          type: string
          format: date-time
          description: The date and time the annotation marks
        description:
          type: string
          description: Description text for the annotation
        user:
          type: object
          properties:
            id:
              type: integer
              description: ID of the user who created the annotation
            name:
              type: string
              description: Name of the user who created the annotation
        createdAt:
          type: string
          format: date-time
          description: When the annotation was created
    CreateAnnotationRequest:
      type: object
      required:
        - date
        - description
      properties:
        date:
          type: string
          format: date-time
          description: The date and time to annotate (YYYY-MM-DDThh:mm:ss)
        description:
          type: string
          description: Description text for the annotation