generated: '2026-08-13'
method: searched
source: >-
  registry.npmjs.org, pypi.org, rubygems.org, repo.packagist.org,
  search.maven.org, azuresearch-usnc.nuget.org — each queried unauthenticated on
  2026-08-13; plus github.com/HubSpot
note: >-
  HubSpot ships first-party API clients for Node, Python, Ruby and PHP only.
  Maven Central group com.hubspot carries HubSpot's open-source infrastructure
  libraries (Singularity, Horizon, algebra, basepom) but NO Java API client, and
  every HubSpot API client on NuGet is community-authored — so neither Java nor
  .NET is recorded as an official SDK here. The published Go SDK is a community
  project, not HubSpot's.
packages:
- language: javascript
  registry: npm
  name: "@hubspot/api-client"
  url: https://www.npmjs.com/package/@hubspot/api-client
  install: npm install @hubspot/api-client
  official: true
  version: 14.0.1
  published: '2026-07-01'
  role: REST API client
- language: python
  registry: pypi
  name: hubspot-api-client
  url: https://pypi.org/project/hubspot-api-client/
  install: pip install hubspot-api-client
  official: true
  version: 12.0.0
  published: '2025-05-07'
  role: REST API client
  note: >-
    Last release 2025-05-07 — over a year behind the Node client (14.0.1,
    2026-07-01) and behind HubSpot's own 2026-03 date-based API version.
- language: ruby
  registry: rubygems
  name: hubspot-api-client
  url: https://rubygems.org/gems/hubspot-api-client
  install: gem install hubspot-api-client
  official: true
  version: 20.0.0
  published: '2025-05-08'
  role: REST API client
  note: >-
    Last release 2025-05-08 — same 2025 freeze as the Python client.
- language: php
  registry: packagist
  name: hubspot/api-client
  url: https://packagist.org/packages/hubspot/api-client
  install: composer require hubspot/api-client
  official: true
  version: 14.1.0
  published: '2026-05-12'
  role: REST API client
- language: javascript
  registry: npm
  name: "@hubspot/cli"
  url: https://www.npmjs.com/package/@hubspot/cli
  install: npm install -g @hubspot/cli
  official: true
  version: 8.12.0
  published: '2026-08-03'
  role: CLI
  binaries: [hs, hscms]
  source: https://github.com/HubSpot/hubspot-cli
- language: javascript
  registry: npm
  name: "@hubspot/local-dev-lib"
  url: https://www.npmjs.com/package/@hubspot/local-dev-lib
  install: npm install @hubspot/local-dev-lib
  official: true
  version: 5.10.2
  published: '2026-08-12'
  role: local development library backing the CLI
- language: javascript
  registry: npm
  name: "@hubspot/ui-extensions"
  url: https://www.npmjs.com/package/@hubspot/ui-extensions
  install: npm install @hubspot/ui-extensions
  official: true
  version: 0.15.1
  published: '2026-07-31'
  role: React components for extending the HubSpot UI
- language: javascript
  registry: npm
  name: "@hubspot/calling-extensions-sdk"
  url: https://www.npmjs.com/package/@hubspot/calling-extensions-sdk
  install: npm install @hubspot/calling-extensions-sdk
  official: true
  version: 0.9.7
  published: '2025-10-03'
  role: embed a calling app inside HubSpot
  source: https://github.com/HubSpot/calling-extensions-sdk
- language: javascript
  registry: npm
  name: "@hubspot/mcp-server"
  url: https://www.npmjs.com/package/@hubspot/mcp-server
  install: npx -y @hubspot/mcp-server
  official: true
  version: 0.4.0
  published: '2025-06-18'
  role: local-stdio MCP server
  note: >-
    Published 2025-06-18 and not updated since; the hosted remote MCP server at
    https://mcp.hubspot.com is the current surface (see mcp/hubspot-mcp.yml).
    github.com/HubSpot/mcp-server exists but its default branch is empty.
not_official:
- language: java
  registry: maven
  finding: >-
    No HubSpot-published Java API client. search.maven.org g:com.hubspot returns
    60 artifacts, all infrastructure OSS (basepom, Horizon, Singularity,
    NioImapClient, algebra) — none is a REST client for the HubSpot API.
- language: csharp
  registry: nuget
  finding: >-
    No first-party HubSpot API client. The .NET packages on NuGet
    (Chinchilla.HubSpot.NET, HubSpot.NETCORE, SquaredUp.HubSpot.NET,
    HubSpotClient) are all community-authored. HubSpot.Tether is published by
    HubSpot, Inc. but is the Tether positioning library, not an API client.
- language: go
  registry: pkg.go.dev
  finding: >-
    HubSpot's own developer blog (2026-05-14, "Introducing hubspot-go, a
    community Go SDK for HubSpot") describes the Go SDK as a COMMUNITY project,
    so it is not recorded as official.