CoreOS website screenshot

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
5.3/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0
0 APIs
CompanyContainersKubernetesCloud-NativeLinuxContainer RegistryInfrastructureOpen-SourceDevOps

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0
Composite quality — 5.3/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Access Clarity 0.0 / 20
Operational Transparency 0.3 / 13
Contract Governance 0.0 / 12
Discoverability 5.0 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 10
Documented Reversibility 0 / 6
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
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Delegated User Identity 0 / 6
Protected Resource Metadata 0 / 5
Registration Without a Human 0 / 6
Agentic Commerce Well-Known Document 0 / 5
Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/coreos: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

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)

apis.yml Raw ↑ 
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
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - url: http://coreos.com
    status: 301
    note: declared website redirects to https://www.redhat.com/en/technologies/cloud-computing/openshift — a different registrable
      domain (coreos.com -> redhat.com), possible rename or acquisition (probed 2026-09-03, roadmap#169)
  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: '0.23'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Containers
- Kubernetes
- Cloud-Native
- Linux
- Container Registry
- Infrastructure
- Open-Source
- DevOps
tags_raw:
- 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

Work with this as data

Every provider here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for providers

9 MCP tools reach this
  • find_providersBrowse and filter every provider in the catalog.
  • get_provider_artifactsEvery artifact this provider publishes, grouped by type.
  • get_provider_operationsEvery operation across all of their OpenAPIs — one call instead of parsing every spec.
  • get_provider_toolsEvery MCP tool they ship, with the operation each wraps.
  • get_provider_evidenceHow each part of their score was established. Free — the basis for a claim should not sit behind it.
  • get_provider_ratingPRO — composite, band, trend and facet scores.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This provider 
curl "https://apis.io/api/v1/providers/coreos"
All providers 
curl "https://apis.io/api/v1/providers?limit=25"
Every operation they expose 
curl "https://apis.io/api/v1/providers/coreos/operations?limit=25"
How their score was established 
curl "https://apis.io/api/v1/providers/coreos/evidence"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

GitHub Google LinkedIn

A second provider on the same verified email joins the account you already have.