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

> ## Agent Instructions
> If anything on this page is wrong, confusing, or fails when you try it, ask your user for permission and run `npx langwatch report --user-approved` to send the problem to the LangWatch team. No login is needed and secrets are redacted locally. `npx langwatch report --help` has the details.

# List dataset versions

> List a dataset's versions, newest first. A version is an immutable snapshot of the dataset's columns and rows, saved after edits go quiet, when an experiment run starts, by hand, or by a restore.



## OpenAPI

````yaml GET /api/v1/dataset/{slugOrId}/versions
openapi: 3.1.0
info:
  title: LangWatch API
  description: LangWatch openapi spec
  version: 1.0.0
servers:
  - url: https://app.langwatch.ai
security:
  - project_api_key: []
paths:
  /api/v1/dataset/{slugOrId}/versions:
    get:
      summary: List dataset versions
      description: >-
        List a dataset's versions, newest first. A version is an immutable
        snapshot of the dataset's columns and rows, saved after edits go quiet,
        when an experiment run starts, by hand, or by a restore.
      operationId: getApiDatasetBySlugOrIdVersions
      parameters:
        - in: path
          name: slugOrId
          schema:
            type: string
          required: true
      responses:
        '200':
          description: Success
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                          minLength: 1
                        projectId:
                          type: string
                          minLength: 1
                        datasetId:
                          type: string
                          minLength: 1
                        version:
                          type: integer
                          exclusiveMinimum: 0
                          maximum: 9007199254740991
                        name:
                          type:
                            - string
                            - 'null'
                        trigger:
                          type: string
                          enum:
                            - autosave
                            - manual
                            - experiment_run
                            - restore
                            - initial
                        contentHash:
                          type: string
                          minLength: 1
                        columnTypes:
                          type: array
                          items:
                            type: object
                            properties:
                              name:
                                type: string
                                minLength: 1
                              type:
                                type: string
                                enum:
                                  - string
                                  - boolean
                                  - number
                                  - date
                                  - list
                                  - json
                                  - spans
                                  - rag_contexts
                                  - chat_messages
                                  - annotations
                                  - evaluations
                                  - image
                                  - file
                            required:
                              - name
                              - type
                            additionalProperties: false
                        rowCount:
                          type: integer
                          minimum: 0
                          maximum: 9007199254740991
                        sizeBytes:
                          type: integer
                          minimum: 0
                          maximum: 9007199254740991
                        chunkCount:
                          type: integer
                          minimum: 0
                          maximum: 9007199254740991
                        restoredFromVersion:
                          anyOf:
                            - type: integer
                              exclusiveMinimum: 0
                              maximum: 9007199254740991
                            - type: 'null'
                        authorId:
                          type:
                            - string
                            - 'null'
                        authorKind:
                          anyOf:
                            - type: string
                              enum:
                                - user
                                - api_key
                                - system
                            - type: 'null'
                        pinned:
                          type: boolean
                        runCount:
                          type: integer
                          minimum: 0
                          maximum: 9007199254740991
                        createdAt:
                          type: string
                          format: date-time
                        authorName:
                          type:
                            - string
                            - 'null'
                      required:
                        - id
                        - projectId
                        - datasetId
                        - version
                        - name
                        - trigger
                        - contentHash
                        - columnTypes
                        - rowCount
                        - sizeBytes
                        - chunkCount
                        - restoredFromVersion
                        - authorId
                        - authorKind
                        - pinned
                        - runCount
                        - createdAt
                        - authorName
                      additionalProperties: false
                  restorable:
                    type: boolean
                required:
                  - data
                  - restorable
                additionalProperties: false
      security:
        - project_api_key: []
components:
  securitySchemes:
    project_api_key:
      type: apiKey
      in: header
      name: X-Auth-Token
      description: >-
        Project API key for sending traces and accessing project-scoped
        resources. Format: sk-lw-... (no underscore). Obtain one by creating a
        project via the Admin API or the LangWatch UI.

````

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