> ## 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.

# Notebook revisions

> notebook revisions. GET /api/v1/notebooks/{notebook_id}/revisions. Read saved notebook revision history or one exact revision without changing the active document.

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/notebooks/{notebook_id}/revisions
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/notebooks/{notebook_id}/revisions:
    get:
      tags:
        - Notebooks
      summary: notebook revisions
      description: >-
        notebook revisions. GET /api/v1/notebooks/{notebook_id}/revisions. Read
        saved notebook revision history or one exact revision without changing
        the active document.
      operationId: notebook_revisions
      parameters:
        - in: path
          name: notebook_id
          required: true
          schema:
            format: uuid
            type: string
        - in: query
          name: before
          required: false
          schema:
            minimum: 0
            type: integer
        - in: query
          name: limit
          required: false
          schema:
            minimum: 1
            type: integer
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: >-
                  #/components/schemas/app_notebooks_core_src_models_rs_NotebookRevisionListResponse
          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:
    app_notebooks_core_src_models_rs_NotebookRevisionListResponse:
      properties:
        continuation:
          anyOf:
            - minimum: 0
              type: integer
            - type: 'null'
        revisions:
          items:
            $ref: >-
              #/components/schemas/app_notebooks_core_src_models_rs_NotebookRevisionSummary
          type: array
      required:
        - revisions
        - continuation
      type: object
    ApiError:
      properties:
        error:
          properties:
            code:
              type: string
            message:
              type: string
          required:
            - code
            - message
          type: object
      required:
        - error
      type: object
    app_notebooks_core_src_models_rs_NotebookRevisionSummary:
      properties:
        name:
          type: string
        revision:
          minimum: 0
          type: integer
        updated_at:
          $ref: '#/components/schemas/shared_common_src_time_rs_WallClockTimestamp'
      required:
        - revision
        - name
        - updated_at
      type: object
    shared_common_src_time_rs_WallClockTimestamp:
      properties:
        unix_millis:
          type: integer
      required:
        - unix_millis
      type: object

````

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