CoreOS

CoreOS was a San Francisco-based container infrastructure company founded in 2013 that built a lightweight, automatically-updating Linux distribution (Container Linux, originally CoreOS Linux) and a family of now-foundational cloud-native open source projects: etcd (the distributed key-value store at the heart of Kubernetes), the Quay container registry, the Tectonic enterprise Kubernetes platform, the rkt container engine, flannel networking, Clair image-vulnerability scanning, and Ignition provisioning. Red Hat acquired CoreOS in January 2018 for approximately $250 million. Its technologies were folded into Red Hat's portfolio — Container Linux became Red Hat CoreOS and the community Fedora CoreOS, Tectonic merged into OpenShift, Quay continues as Red Hat Quay, and etcd and rkt were donated to the Cloud Native Computing Foundation. The company no longer operates independently; coreos.com redirects to Red Hat OpenShift. The github.com/coreos organization remains active as the upstream home for Fedora CoreOS components such as Ignition, Butane, and fleetlock.

CoreOS is profiled on the APIs.io network. Tagged areas include Company, Containers, Kubernetes, Cloud Native, and Linux.

🌐 Visit website 📡 Source on GitHub

7.4/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5

0 APIs

CompanyContainersKubernetesCloud NativeLinuxContainer RegistryInfrastructureOpen SourceDevOps

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 7.4/100 · minimal

Contract Quality 0.0 / 25

Developer Ergonomics 0.0 / 20

Commercial Clarity 0.0 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 6.8 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

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Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: coreos
name: CoreOS
description: 'CoreOS was a San Francisco-based container infrastructure company founded in 2013 that built a lightweight,
  automatically-updating Linux distribution (Container Linux, originally CoreOS Linux) and a family of now-foundational cloud-native
  open source projects: etcd (the distributed key-value store at the heart of Kubernetes), the Quay container registry, the
  Tectonic enterprise Kubernetes platform, the rkt container engine, flannel networking, Clair image-vulnerability scanning,
  and Ignition provisioning. Red Hat acquired CoreOS in January 2018 for approximately $250 million. Its technologies were
  folded into Red Hat''s portfolio — Container Linux became Red Hat CoreOS and the community Fedora CoreOS, Tectonic merged
  into OpenShift, Quay continues as Red Hat Quay, and etcd and rkt were donated to the Cloud Native Computing Foundation.
  The company no longer operates independently; coreos.com redirects to Red Hat OpenShift. The github.com/coreos organization
  remains active as the upstream home for Fedora CoreOS components such as Ignition, Butane, and fleetlock.'
url: https://raw.githubusercontent.com/api-evangelist/coreos/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/u/3730757?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- gv
- kleiner-perkins
- y-combinator
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired
x-acquired-by: red-hat
x-acquired-date: 2018-01
x-acquired-note: Acquired by Red Hat (Jan 2018, ~$250M) and fully absorbed. No independent CoreOS API, developer portal, SDKs,
  or well-known surface exists; coreos.com 301-redirects to Red Hat OpenShift. Open source projects live on under github.com/coreos,
  Fedora CoreOS, Red Hat, and the CNCF.
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Containers
- Kubernetes
- Cloud Native
- Linux
- Container Registry
- Infrastructure
- Open Source
- DevOps
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: http://coreos.com
- type: GitHubOrganization
  url: https://github.com/coreos
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence