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

# Get sessions or messages

> With `soul`, `role`, and `session_id` all provided, returns the full message history for that session. Otherwise, returns a list of all sessions for the user.



## OpenAPI

````yaml GET /v1/agent/sessions/{userId}
openapi: 3.1.0
info:
  title: Kairn API
  version: 1.0.0
  description: >-
    The Kairn API. All requests require an `X-API-Key` header with your tenant
    API key.
servers:
  - url: https://api.kairn.sh
    description: Production
security:
  - ApiKey: []
tags:
  - name: Agent
    description: Invoke agents and stream responses.
  - name: Memory
    description: Read and write per-user agent memory.
  - name: Souls
    description: Manage agent identities.
  - name: Skills
    description: Manage custom skills (instructions and webhook tools).
  - name: Mandates
    description: Schedule autonomous agent tasks.
  - name: Invocations
    description: Inspect past agent runs.
  - name: Sessions
    description: Access multi-turn conversation history.
  - name: Audit
    description: Audit log for all agent activity.
paths:
  /v1/agent/sessions/{userId}:
    get:
      tags:
        - Sessions
      summary: Get sessions or messages
      description: >-
        With `soul`, `role`, and `session_id` all provided, returns the full
        message history for that session. Otherwise, returns a list of all
        sessions for the user.
      operationId: sessions-get
      parameters:
        - name: userId
          in: path
          required: true
          schema:
            type: string
        - name: soul
          in: query
          schema:
            type: string
        - name: role
          in: query
          schema:
            type: string
        - name: session_id
          in: query
          schema:
            type: string
      responses:
        '200':
          description: Session list or message history.
          content:
            application/json:
              schema:
                oneOf:
                  - type: object
                    properties:
                      sessions:
                        type: array
                        items:
                          type: object
                  - type: object
                    properties:
                      soul:
                        type: string
                      role:
                        type: string
                      session_id:
                        type: string
                      messages:
                        type: array
                        items:
                          type: object
                          properties:
                            role:
                              type: string
                            content:
                              type: string
components:
  securitySchemes:
    ApiKey:
      type: apiKey
      in: header
      name: X-API-Key

````

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