Microsoft .NET Registration API

openapi: 3.1.0
info:
  title: NuGet Server API (V3) PackageContent Registration API
  description: The NuGet Server API is the set of HTTP endpoints used by the .NET CLI, NuGet client, Visual Studio, and other tooling to discover, download, publish, and unlist NuGet packages from nuget.org and compatible package sources. Entry point is the service index at /v3/index.json. Endpoints documented here cover discovery (service index), search, registration (package metadata), package base address (content), and publish.
  version: '3'
servers:
- url: https://api.nuget.org/v3
  description: nuget.org V3 API root
security: []
tags:
- name: Registration
paths:
  /registration5-semver1/{id}/index.json:
    get:
      tags:
      - Registration
      summary: Get registration index for a package
      description: Returns the registration index for a package ID, listing all available versions and metadata. Package ID must be lowercased.
      operationId: getRegistrationIndex
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
        description: Lowercased package ID.
      responses:
        '200':
          description: Registration index
          content:
            application/json:
              schema:
                type: object
        '404':
          description: Package not found
  /registration5-semver1/{id}/{version}.json:
    get:
      tags:
      - Registration
      summary: Get registration leaf for a specific package version
      operationId: getRegistrationLeaf
      parameters:
      - name: id
        in: path
        required: true
        schema:
          type: string
      - name: version
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Registration leaf
          content:
            application/json:
              schema:
                type: object
        '404':
          description: Version not found
components:
  securitySchemes:
    apiKey:
      type: apiKey
      in: header
      name: X-NuGet-ApiKey
      description: NuGet API key (required only for PackagePublish push/delete operations).
x-generated-from: https://learn.microsoft.com/en-us/nuget/api/overview
x-generated-by: claude-genwave10-08-2026-05-23