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

# Start a thread (manager→report, or employee→manager) with a

> Start a thread (manager→report, or employee→manager) with a first message



## OpenAPI

````yaml /api-reference/openapi.json post /api/messages/threads
openapi: 3.1.0
info:
  title: ontime API
  description: APIs for ontime.v2
  version: 1.0.0
servers:
  - url: https://app.ontime.hosai.app
    description: Production
security:
  - apiKey: []
paths:
  /api/messages/threads:
    post:
      tags:
        - Messages
      summary: Start a thread (manager→report, or employee→manager) with a
      description: >-
        Start a thread (manager→report, or employee→manager) with a first
        message
      operationId: postApiMessagesThreads
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                employeeId:
                  type: string
                  format: uuid
                  pattern: >-
                    ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                subject:
                  type: string
                context:
                  anyOf:
                    - type: object
                      properties:
                        kind:
                          type: string
                          enum:
                            - attendanceDay
                            - general
                            - regularization
                        id:
                          type: string
                      required:
                        - kind
                        - id
                    - type: 'null'
                body:
                  type: string
                  minLength: 1
              required:
                - body
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                    format: uuid
                    pattern: >-
                      ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                  employeeId:
                    type: string
                    format: uuid
                    pattern: >-
                      ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                  managerId:
                    type: string
                    format: uuid
                    pattern: >-
                      ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$
                  otherName:
                    type: string
                  subject:
                    anyOf:
                      - type: string
                      - type: 'null'
                  context:
                    anyOf:
                      - type: object
                        properties:
                          kind:
                            type: string
                            enum:
                              - attendanceDay
                              - general
                              - regularization
                          id:
                            type: string
                        required:
                          - kind
                          - id
                      - type: 'null'
                  lastMessageAt:
                    type: string
                  lastPreview:
                    type: string
                  unread:
                    type: integer
                    minimum: -9007199254740991
                    maximum: 9007199254740991
                required:
                  - id
                  - employeeId
                  - managerId
                  - otherName
                  - subject
                  - context
                  - lastMessageAt
                  - lastPreview
                  - unread
components:
  securitySchemes:
    apiKey:
      type: http
      scheme: bearer
      bearerFormat: ont_ API key
      description: >-
        Issue keys in Settings → API. Send them as `Authorization: Bearer ont_…`
        (an `X-Api-Key: ont_…` header is also accepted). Session-cookie routes
        are used by the OnTime web apps and are shown for completeness.

````