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kubernetes/apiextensions-apiserver

API server for API extensions like CustomResourceDefinitions

Go ◇ k8s-staging Apache-2.0

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★258STARS

⑂140FORKS

!0ISSUES

🏆#4,788GLOBAL RANK

🔥3DAYS TRENDING

🚀

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Star History

Continuous Observations

Interactive star growth chart for kubernetes/apiextensions-apiserver

Momentum

+10

STARS · LAST 30 DAYS

PER DAY

#487

MOST-STARRED Go

Window	7 days	30 days	90 days
Stars gained	+7	+10	+90
Per day	1	1	1
Forks gained	+1	+3	+10

apiextensions-apiserver gained 10 stars in the last 30 days, about 1 a day, and now has 258. It is about 9 years old and has averaged roughly 29 stars a year. It ranks #487 among Go repositories and #4,788 across all languages on GitHubRepo.

Trending Record

apiextensions-apiserver has maintained a continuous presence across global trending indexes, peaking at #3409. Below is the 30-day activity profile:

💡 Overview

apiextensions-apiserver is an open-source project written in Go: API server for API extensions like CustomResourceDefinitions.

Engineered for speed, consistency, and developer ease, it solves common hurdles in k8s-staging. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.

⚡ Key Features

Optimized execution pipeline written in Go for predictable speed.

Zero-friction configuration with comprehensive sensible defaults out of the box.

Cross-platform runtime support across Linux, macOS, and Windows environments.

Strong typing and modular architecture designed for easy extension and maintainability.

Standardized CLI and API interfaces for smooth integration into CI/CD workflows.

Active community maintenance with regular dependency updates and security patches.

📥 Installation

terminal

$ go install github.com/kubernetes/apiextensions-apiserver@latest

$ go install github.com/kubernetes/apiextensions-apiserver@latest

> go install github.com/kubernetes/apiextensions-apiserver@latest

⚙ System Requirements

Platforms

• macOS
• Linux
• Windows

Runtime & Dependencies

Go >= 1.21 runtime environment

Architecture

x86_64, ARM64 (Apple Silicon & Graviton)

🧠 How It Works

apiextensions-apiserver coordinates its core functionality through a modular Go pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.

🎯 Production Use Cases

Production System Integration

Embed apiextensions-apiserver into Go backend services to handle core application logic.

CI/CD Automated Pipelines

Run automated validation, builds, and integration suites during deployments.

Developer Tooling & Workflows

Accelerate developer onboarding with pre-configured project utilities.

Open Source Extension

Fork and customize internal modules under the repository's open Apache-2.0 license.

🚀 Getting Started

Install apiextensions-apiserver using your package manager: `go install github.com/kubernetes/apiextensions-apiserver@latest`

Initialize your project workspace or configuration file for apiextensions-apiserver.

Import apiextensions-apiserver into your codebase or invoke it directly from your terminal.

Execute your test suite or run `apiextensions-apiserver --help` to verify successful setup.

👍 Strengths

Active community backing with 258 GitHub stars and verified adoption.

Permissive open-source distribution under the Apache-2.0 license.

Built in Go for high execution speed and developer familiarity.

Cross-platform compatibility across modern Linux, macOS, and Windows environments.

Clean modular design allowing flexible configuration and pipeline integration.

⚠️ Considerations

Requires familiarity with Go and modern CLI workflows.

Ecosystem extensions may require manual configuration depending on environment constraints.

Active development roadmap means breaking API changes may occur across major versions.

⇄ Alternatives & Direct Competitors

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👥 Who Should Use This

Developers and engineering teams building with Go, seeking reliable, tested, and actively maintained tooling for production workloads.

🏆 Nearby in the Rankings

kubernetes/apiextensions-apiserver is currently ranked #4,788 by stars across every repository tracked on GitHubRepo. These are adjacent projects:

Rank	Repository	Language	Stars	Action
#4,777	ktmouk/minute	TypeScript	★ 260	Compare ↗
#4,777	NanmiCoder/open-image-prompts	Python	★ 260	Compare ↗
#4,785	gabriel/GHKit	Objective-C	★ 259	Compare ↗
#4,785	freesteph/cucumber.el	Emacs Lisp	★ 259	Compare ↗
#4,785	mattrobinsonsre/terrapod	Python	★ 259	Compare ↗
#4,788	kubernetes/apiextensions-apiserver This Project	Go	★ 258
#4,788	defunkt/cache_fu	Ruby	★ 258	Compare ↗
#4,788	intive-FDV/DynamicJasper	Java	★ 258	Compare ↗
#4,788	dbt-msft/dbt-sqlserver	Python	★ 258	Compare ↗
#4,788	Remora/Remora.Discord	C#	★ 258	Compare ↗
#4,788	Nasller/CodeGlancePro	Kotlin	★ 258	Compare ↗

Frequently Asked Questions

What does apiextensions-apiserver do? +

API server for API extensions like CustomResourceDefinitions

What language is apiextensions-apiserver written in? +

The primary language is Go. Topics include: k8s-staging.

Is apiextensions-apiserver actively maintained? +

Yes, the last recorded push was on Sep 25, 2026 with 0 open issues being tracked.

How many stars does apiextensions-apiserver have? +

apiextensions-apiserver has 258 stars and 140 forks on GitHub.

How does apiextensions-apiserver rank among GitHub repositories? +

With 258 stars, kubernetes/apiextensions-apiserver is ranked #4,788 globally across all repositories tracked on GitHubRepo and #487 among Go projects.

What license is apiextensions-apiserver distributed under? +

The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.

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LinkedIn

Why apiextensions-apiserver is replacing paid subscriptions for engineering teams

Stop paying $50+/month for locked SaaS tools.

Over 258 developers have starred kubernetes/apiextensions-apiserver, an impressive Go open-source project designed to API server for API extensions like CustomResourceDefinitions.

Key Engineering Advantages:
• 100% Local-First: Complete data privacy with zero tracking or telemetry.
• Zero Subscription Costs: No paywalls, per-seat fees, or API markups.
• Complete Customization: Native open-source architecture you can fork, inspect, and deploy anywhere.
• Proven Adoption: 258 GitHub stars and 140 forks.

If you're looking to streamline your engineering workflows without ballooning software expenses, this is worth checking out.

👉 Full star velocity and architectural report: https://githubrepo.cloud/repo/kubernetes/apiextensions-apiserver
⭐ GitHub Repository: https://github.com/kubernetes/apiextensions-apiserver

#OpenSource #SoftwareEngineering #DeveloperTools #Tech #Programming #Go

🤖

Reddit (r/opensource, r/webdev, r/selfhosted)

Show r/opensource: apiextensions-apiserver – A free, self-hosted tool that lets you API server for API extensions like CustomResourceDefinitions

Hey everyone,

I wanted to share an interesting open-source project called **apiextensions-apiserver** (https://github.com/kubernetes/apiextensions-apiserver) that has been picking up heavy momentum lately (258 stars).

### What problem does it solve?
Many existing tools in this domain require expensive cloud plans or store your data on third-party servers. apiextensions-apiserver was built with a local-first philosophy, allowing developers to API server for API extensions like CustomResourceDefinitions without recurring subscription costs or privacy compromises.

### Tech Stack & Details:
- **Language:** Go
- **License:** Apache-2.0
- **GitHub:** [kubernetes/apiextensions-apiserver](https://github.com/kubernetes/apiextensions-apiserver)
- **Live Star Momentum Tracker:** [https://githubrepo.cloud/repo/kubernetes/apiextensions-apiserver](https://githubrepo.cloud/repo/kubernetes/apiextensions-apiserver)

Has anyone here tested this in production or integrated it into existing pipelines? Would love to hear your experience and feedback!

🟧

Hacker News (Show HN)

Show HN: apiextensions-apiserver – API server for API extensions like CustomResourceDefinitions

Hi HN,

apiextensions-apiserver is an open-source Go project designed to API server for API extensions like CustomResourceDefinitions.

Rather than relying on closed cloud endpoints, it executes locally on your own machine, providing predictable latency, total privacy, and full control.

Repository: https://github.com/kubernetes/apiextensions-apiserver
Documentation & Metrics: https://githubrepo.cloud/repo/kubernetes/apiextensions-apiserver

Feedback and PRs are welcome.

✍️

Dev.to / Hashnode Tags: opensource, go, devtools, webdev

This GitHub repo replaces a $50 a month tool! Stop paying expensive software subscriptions. Meet apiextensions-apiserver (258 GitHub Stars)

---
title: This GitHub repo replaces a $50 a month tool! Stop paying expensive software subscriptions. Meet apiextensions-apiserver
published: true
tags: opensource, go, devtools, programming
---

## Stop Paying Software Subscriptions For This

Finding high-quality, production-ready open source alternatives to expensive proprietary software can save engineering teams thousands of dollars every year.

Today, we're looking at **[kubernetes/apiextensions-apiserver](https://github.com/kubernetes/apiextensions-apiserver)**, a rapidly rising repository with **258 GitHub stars** and **140 forks**.

### What is apiextensions-apiserver?

> API server for API extensions like CustomResourceDefinitions

Written in **Go**, apiextensions-apiserver runs directly on your local workstation or private server, keeping your data secure and eliminating recurring license fees.

### Key Highlights
- **High Performance:** Lightweight, reliable, and built in Go.
- **Privacy & Security:** Complete ownership of your environment and data.
- **Growing Momentum:** Ranked **#4,788** globally across tracked repositories on [GitHubRepo](https://githubrepo.cloud/repo/kubernetes/apiextensions-apiserver).

### Quick Start
To get started locally:

```bash
git clone https://github.com/kubernetes/apiextensions-apiserver.git
cd apiextensions-apiserver
```

Check out the full repository and star history analytics here:
- **GitHub:** [kubernetes/apiextensions-apiserver](https://github.com/kubernetes/apiextensions-apiserver)
- **Star Velocity Tracker:** [apiextensions-apiserver on GitHubRepo.cloud](https://githubrepo.cloud/repo/kubernetes/apiextensions-apiserver)

𝕏

X / Twitter Communities

Thread / Community Post for apiextensions-apiserver

Developers are sleeping on this GitHub repo 👇

kubernetes/apiextensions-apiserver (258 ⭐) replaces expensive monthly software subscriptions with 100% free open source code.

⚡ What it does: API server for API extensions like CustomResourceDefinitions
💻 Built with: Go
🔒 100% local execution & privacy

Check live star velocity and benchmarks:
https://githubrepo.cloud/repo/kubernetes/apiextensions-apiserver

#opensource #developer #coding #tech #programming

🧵

Threads Topics

Topic Discussion: Open Source & Developer Tools

This GitHub repo replaces a $50/month tool! 🚀

If you want to save hours of manual work and stop paying subscriptions, check out kubernetes/apiextensions-apiserver.

It already has over 258 stars and lets you API server for API extensions like CustomResourceDefinitions.

Drop a comment if you've tried it, or check the full star momentum report:
https://githubrepo.cloud/repo/kubernetes/apiextensions-apiserver

From our network

kubernetes/apiextensions-apiserver

Star History

Momentum

Trending Record

💡 Overview

⚡ Key Features

📥 Installation

⚙ System Requirements

Platforms

Runtime & Dependencies

Architecture

🧠 How It Works

🎯 Production Use Cases

Production System Integration

CI/CD Automated Pipelines

Developer Tooling & Workflows

Open Source Extension

🚀 Getting Started

👍 Strengths

⚠️ Considerations

⇄ Alternatives & Direct Competitors

👥 Who Should Use This

🏆 Nearby in the Rankings

Frequently Asked Questions

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