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

# Upload data chunk

> Upload a chunk of file data for use in large file uploads.



## OpenAPI

````yaml https://dev.hub.oxen.ai/api/_spec/oxen_server_openapi.json post /api/repos/{namespace}/{repo_name}/commits/upload_chunk
openapi: 3.1.0
info:
  description: >-
    Oxen is a fast, unstructured data version control, to help version large
    machine learning datasets written in Rust.
  license:
    name: ''
  title: oxen-server
  version: 0.50.0
servers:
  - description: Production API
    url: https://hub.oxen.ai
  - description: Local Development
    url: http://localhost:3000
security:
  - api_key: []
tags:
  - description: Namespace management endpoints
    name: Namespaces
  - description: Repository management endpoints.
    name: Repositories
paths:
  /api/repos/{namespace}/{repo_name}/commits/upload_chunk:
    post:
      tags:
        - Commits
      summary: Upload data chunk
      description: Upload a chunk of file data for use in large file uploads.
      operationId: upload_chunk
      parameters:
        - description: Namespace of the repository
          example: ox
          in: path
          name: namespace
          required: true
          schema:
            type: string
        - description: Name of the repository
          example: ImageNet-1k
          in: path
          name: repo_name
          required: true
          schema:
            type: string
        - example: a2c3d4e5f67890b1c2d3e4f5a6b7c8d9
          in: path
          name: hash
          required: true
          schema:
            type: string
        - example: 1
          in: path
          name: chunk_num
          required: true
          schema:
            minimum: 0
            type: integer
        - example: 10
          in: path
          name: total_chunks
          required: true
          schema:
            minimum: 0
            type: integer
        - example: 100000000
          in: path
          name: total_size
          required: true
          schema:
            minimum: 0
            type: integer
        - example: true
          in: path
          name: is_compressed
          required: true
          schema:
            type: boolean
        - example: images/cow.jpg
          in: path
          name: filename
          required: true
          schema:
            type:
              - string
              - 'null'
      requestBody:
        content:
          application/octet-stream:
            schema:
              items:
                format: int32
                minimum: 0
                type: integer
              type: array
        description: Chunk of data (binary bytes)
        required: true
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/StatusMessage'
          description: Chunk uploaded successfully
components:
  schemas:
    StatusMessage:
      properties:
        oxen_version:
          type:
            - string
            - 'null'
        status:
          type: string
        status_message:
          type: string
      required:
        - status
        - status_message
      type: object
  securitySchemes:
    api_key:
      bearerFormat: JWT
      scheme: bearer
      type: http

````