> ## Documentation Index
> Fetch the complete documentation index at: https://docs.e6data.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List session summaries

> list session summaries. GET /api/v1/sessions. Uses the same payload, validation, revision checks and response as the unified HTTP API.

ReferenceApplies to: Unified engine deployments

## Related guidance

[Addresses and access](https://docs.e6data.com/transformation/http/access.md) · [Request identity](https://docs.e6data.com/transformation/http/request-identity.md) · [Errors and recovery](https://docs.e6data.com/transformation/http/errors.md) · [Pagination and results](https://docs.e6data.com/transformation/http/results.md)


## OpenAPI

````yaml openapi/transformation.json GET /api/v1/sessions
openapi: 3.1.0
info:
  description: >-
    HTTP contracts for the Unified engine. Requests use the connected
    deployment's access model and configured owner. Response examples are
    illustrative; inspect your engine response in your client. SQL-managed
    secrets, credentials, streaming pipelines and maintenance run through
    session operations.
  title: Laminar Unified HTTP API
  version: v1
servers:
  - url: https://engine.example.com
    description: >-
      Example engine origin. Replace it with your deployment URL and any API
      mount prefix.
security: []
paths:
  /api/v1/sessions:
    get:
      tags:
        - Sessions and SQL
      summary: list session summaries
      description: >-
        list session summaries. GET /api/v1/sessions. Uses the same payload,
        validation, revision checks and response as the unified HTTP API.
      operationId: list_session_summaries
      parameters:
        - in: query
          name: closed
          required: false
          schema:
            type: boolean
        - in: query
          name: continuation_token
          required: false
          schema:
            type: string
        - in: query
          name: limit
          required: false
          schema:
            description: >-
              Page size, bounded by the server. For query results this counts
              Arrow batches, default 1.
            minimum: 1
            type: integer
        - in: query
          name: q
          required: false
          schema:
            type: string
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: >-
                  #/components/schemas/frontend_session_src_models_rs_SessionListResponse
          description: Successful response.
        default:
          content:
            application/json:
              example:
                error:
                  code: invalid_request
                  message: Check the request fields
              schema:
                $ref: '#/components/schemas/ApiError'
          description: A rejected or failed request. Inspect error.code before retrying.
components:
  schemas:
    frontend_session_src_models_rs_SessionListResponse:
      properties:
        continuation_token:
          anyOf:
            - type: string
            - type: 'null'
        sessions:
          items:
            $ref: '#/components/schemas/frontend_session_src_models_rs_SessionSummary'
          type: array
      required:
        - sessions
        - continuation_token
      type: object
    ApiError:
      properties:
        error:
          properties:
            code:
              type: string
            message:
              type: string
          required:
            - code
            - message
          type: object
      required:
        - error
      type: object
    frontend_session_src_models_rs_SessionSummary:
      properties:
        active_operations:
          minimum: 0
          type: integer
        closed:
          type: boolean
        created_at:
          $ref: '#/components/schemas/shared_common_src_time_rs_WallClockTimestamp'
        server_session_id:
          format: uuid
          type: string
        session_id:
          format: uuid
          type: string
        settings:
          $ref: '#/components/schemas/shared_common_src_lib_rs_QuerySettings'
        updated_at:
          $ref: '#/components/schemas/shared_common_src_time_rs_WallClockTimestamp'
      required:
        - session_id
        - server_session_id
        - settings
        - active_operations
        - closed
        - created_at
        - updated_at
      type: object
    shared_common_src_time_rs_WallClockTimestamp:
      properties:
        unix_millis:
          type: integer
      required:
        - unix_millis
      type: object
    shared_common_src_lib_rs_QuerySettings:
      properties:
        ansi_enabled:
          type: boolean
        case_sensitive:
          type: boolean
        current_catalog:
          type: string
        namespace:
          items:
            type: string
          type: array
        time_zone:
          type: string
      required:
        - current_catalog
        - namespace
        - time_zone
        - case_sensitive
        - ansi_enabled
      type: object

````

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