generated: '2026-09-12'
method: searched
source: >-
  npm registry.npmjs.org, PyPI, RubyGems, Maven Central, NuGet, proxy.golang.org and
  registry.terraform.io metadata endpoints, cross-checked against github.com/harness
provider: Harness
providerId: harness
description: >-
  First-party Harness client libraries, agent tooling and infrastructure providers. Harness
  ships no single "Harness API SDK" for the 2,883-operation platform REST API; instead it
  publishes a Go SDK used by its own Terraform provider, a large Feature Flags SDK family
  (one per language/runtime), the Harness MCP server, and the Terraform provider itself.
  Every version/published pair below was read from the registry metadata endpoint on
  2026-09-12.
notes: >-
  The npm package `harness-cli` is NOT Harness.io — it is an unrelated AI agent
  orchestration tool. The Harness CLI is distributed from GitHub releases and Homebrew
  (see cli/harness-cli.yml), not npm.
packages:
  - name: harness-mcp-v2
    registry: npm
    url: https://www.npmjs.com/package/harness-mcp-v2
    repository: https://github.com/harness/mcp-server
    language: typescript
    official: true
    kind: mcp-server
    version: 3.2.27
    published: '2026-09-12'
    description: Harness MCP Server 2.0 — 11 consolidated tools over 247 Harness resource types.
  - name: github.com/harness/harness-go-sdk
    registry: pkg.go.dev
    url: https://pkg.go.dev/github.com/harness/harness-go-sdk
    repository: https://github.com/harness/harness-go-sdk
    language: go
    official: true
    kind: sdk
    version: v0.8.28
    published: '2026-09-10'
    description: Go SDK for the Harness APIs; the client the Harness Terraform provider builds on.
  - name: github.com/harness/harness-openapi-go-client
    registry: pkg.go.dev
    url: https://pkg.go.dev/github.com/harness/harness-openapi-go-client
    repository: https://github.com/harness/harness-openapi-go-client
    language: go
    official: true
    kind: sdk
    version: v0.0.25
    published: '2025-03-14'
    description: >-
      Go client generated from the Harness OpenAPI with swagger-codegen. Last release
      2025-03-14 — over a year behind the platform spec it wraps.
  - name: harness/harness
    registry: terraform
    url: https://registry.terraform.io/providers/harness/harness/latest
    repository: https://github.com/harness/terraform-provider-harness
    language: go
    official: true
    kind: infrastructure-provider
    version: 0.45.5
    published: '2026-09-11'
    description: Terraform provider for provisioning Harness resources (35.2M downloads).
  - name: '@harnessio/ff-javascript-client-sdk'
    registry: npm
    url: https://www.npmjs.com/package/@harnessio/ff-javascript-client-sdk
    repository: https://github.com/harness/ff-javascript-client-sdk
    language: javascript
    official: true
    kind: sdk
    version: 1.32.0
    published: '2025-12-23'
    description: Feature Flags client SDK for browser JavaScript applications.
  - name: '@harnessio/ff-nodejs-server-sdk'
    registry: npm
    url: https://www.npmjs.com/package/@harnessio/ff-nodejs-server-sdk
    repository: https://github.com/harness/ff-nodejs-server-sdk
    language: javascript
    official: true
    kind: sdk
    version: 1.8.12
    published: '2026-01-12'
    description: Feature Flags server SDK for Node.js.
  - name: '@harnessio/ff-react-client-sdk'
    registry: npm
    url: https://www.npmjs.com/package/@harnessio/ff-react-client-sdk
    repository: https://github.com/harness/ff-react-client-sdk
    language: javascript
    official: true
    kind: sdk
    version: 2.4.0
    published: '2026-01-09'
    description: Feature Flags client SDK for React.
  - name: '@harnessio/ff-react-native-client-sdk'
    registry: npm
    url: https://www.npmjs.com/package/@harnessio/ff-react-native-client-sdk
    repository: https://github.com/harness/ff-react-native-client-sdk
    language: javascript
    official: true
    kind: sdk
    version: 3.3.2
    published: '2026-01-13'
    description: Feature Flags client SDK for React Native.
  - name: '@harnessio/uicore'
    registry: npm
    url: https://www.npmjs.com/package/@harnessio/uicore
    repository: https://github.com/harness/uicore
    language: typescript
    official: true
    kind: ui-components
    version: 4.3.6
    published: '2026-03-02'
    description: Harness UICore — the React component library the Harness UI is built from.
  - name: harness-featureflags
    registry: pypi
    url: https://pypi.org/project/harness-featureflags/
    repository: https://github.com/harness/ff-python-server-sdk
    language: python
    official: true
    kind: sdk
    version: 1.7.5
    published: '2026-04-09'
    description: Feature Flags server SDK for Python.
  - name: ff-ruby-server-sdk
    registry: rubygems
    url: https://rubygems.org/gems/ff-ruby-server-sdk
    repository: https://github.com/harness/ff-ruby-server-sdk
    language: ruby
    official: true
    kind: sdk
    version: 1.4.9
    published: '2025-12-10'
    description: Feature Flags server SDK for Ruby.
  - name: io.harness:ff-java-server-sdk
    registry: maven
    url: https://central.sonatype.com/artifact/io.harness/ff-java-server-sdk
    repository: https://github.com/harness/ff-java-server-sdk
    language: java
    official: true
    kind: sdk
    version: 1.8.0
    published: '2024-10-04'
    description: >-
      Feature Flags server SDK for Java. Last Maven Central release 2024-10-04 — the
      oldest first-party artifact in this set.
  - name: io.harness:ff-android-client-sdk
    registry: maven
    url: https://central.sonatype.com/artifact/io.harness/ff-android-client-sdk
    repository: https://github.com/harness/ff-android-client-sdk
    language: java
    official: true
    kind: sdk
    version: 2.2.4
    published: '2024-12-16'
    description: Feature Flags client SDK for Android.
  - name: ff-dotnet-server-sdk
    registry: nuget
    url: https://www.nuget.org/packages/ff-dotnet-server-sdk
    repository: https://github.com/harness/ff-dotnet-server-sdk
    language: dotnet
    official: true
    kind: sdk
    version: 1.7.6
    published: null
    description: >-
      Feature Flags server SDK for .NET. NuGet projectUrl still points at the pre-rename
      github.com/drone/ff-dotnet-server-sdk repository; publish date not exposed by the
      flat registration index queried.
  - name: github.com/harness/ff-golang-server-sdk
    registry: pkg.go.dev
    url: https://pkg.go.dev/github.com/harness/ff-golang-server-sdk
    repository: https://github.com/harness/ff-golang-server-sdk
    language: go
    official: true
    kind: sdk
    version: v0.2.0
    published: '2026-01-21'
    description: Feature Flags server SDK for Go.
currency:
  checked: '2026-09-12'
  freshest: harness-mcp-v2 3.2.27 (2026-09-12)
  stalest: io.harness:ff-java-server-sdk 1.8.0 (2024-10-04)
  finding: >-
    The agent-facing tooling (MCP server, Terraform provider, Go SDK) is released weekly;
    the Feature Flags SDK family and the generated OpenAPI Go client have drifted 8-24
    months behind the platform API they wrap.