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

# Get session

> Returns full details of a session the user has access to.



## OpenAPI

````yaml /api-reference/openapi.yaml get /sessions/{id}
openapi: 3.1.0
info:
  title: Harmonica API
  version: 1.0.0
  description: >
    REST API for the Harmonica structured deliberation platform.

    Provides access to sessions and their data, including creating, updating,
    and querying sessions, plus response submission for active sessions.
  contact:
    name: Harmonica
    url: https://harmonica.chat
servers:
  - url: https://app.harmonica.chat/api/v1
    description: Production
  - url: http://localhost:3000/api/v1
    description: Local development
security:
  - apiKey: []
paths:
  /sessions/{id}:
    get:
      tags:
        - Sessions
      summary: Get session
      description: Returns full details of a session the user has access to.
      operationId: getSession
      parameters:
        - $ref: '#/components/parameters/sessionId'
      responses:
        '200':
          description: Session details
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Session'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  parameters:
    sessionId:
      name: id
      in: path
      required: true
      schema:
        type: string
        format: uuid
      description: Session ID
  schemas:
    Session:
      type: object
      properties:
        id:
          type: string
          format: uuid
        topic:
          type: string
        goal:
          type: string
        critical:
          type: string
          nullable: true
        context:
          type: string
          nullable: true
        prompt:
          type: string
          nullable: true
          description: Custom facilitation prompt for the session's AI facilitator
        status:
          type: string
          enum:
            - active
            - completed
        summary:
          type: string
          nullable: true
        session_md:
          type: string
          nullable: true
          description: Structured SESSION.md brief (auto-generated after summary)
        participant_count:
          type: integer
        created_at:
          type: string
          format: date-time
        updated_at:
          type: string
          format: date-time
      required:
        - id
        - topic
        - goal
        - status
        - participant_count
        - created_at
        - updated_at
    Error:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - unauthorized
                - forbidden
                - not_found
                - validation_error
                - rate_limited
                - internal_error
                - unprocessable
            message:
              type: string
          required:
            - code
            - message
      required:
        - error
  responses:
    Unauthorized:
      description: Missing or invalid API key
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: unauthorized
              message: Invalid or missing API key
    Forbidden:
      description: Insufficient permissions
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: forbidden
              message: You don't have access to this session
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          example:
            error:
              code: not_found
              message: Session not found
  securitySchemes:
    apiKey:
      type: http
      scheme: bearer
      description: |
        API key authentication. Pass your key as a Bearer token.
        Keys use the format `hm_live_<32 hex chars>`.
        Generate keys from your Harmonica dashboard settings.

````