Unikraft

Unikraft is an open-source unikernel library operating system (LibOS) that enables developers to build ultra‑lightweight, high‑performance virtual machines called unikernels. It provides a fast, secure, and customizable platform for cloud‑native, container‑less applications, supporting integration with Docker, Kubernetes, CI/CD pipelines, and various cloud providers. The project is community‑driven, offers extensive documentation, tooling, and a marketplace of pre‑built unikernel applications, aiming to deliver millisecond‑scale startup times and strong isolation.

Unikraft publishes 1 API contract indexed on the APIs.io network. Tagged areas include Company, Unikernel, OpenSource, CloudNative, and Performance.

The Unikraft catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Unikraft’s developer surface includes CLI, authentication, pricing, changelog, getting-started guide, documentation, engineering blog, and 19 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

43.0/100 developing Agent 15/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

5 published contracts 4 Agent Skills

CompanyUnikernelOpenSourceCloudNativePerformance

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 43.0/100 · developing

Contract Quality 4.4 / 21

Developer Ergonomics 9.2 / 17

Access Clarity 11.2 / 17

Operational Transparency 3.5 / 11

Contract Governance 2.2 / 10

Discoverability 5.3 / 9

Regulatory Posture 3.1 / 15

Agent readiness — 15/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 4 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

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.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

Machine-Readable Contract +18 pts — api_specs includes an OpenAPI document
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Rate-Limit Signaling +7 pts — OpenAPI responses document X-RateLimit-* / RateLimit headers (verified), else a rate_limits artifact or RateLimits link (documented)

8 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 20.7 — up to +19.8 composite points
Contract Governance scores 22.0 — up to +9.4 composite points
Developer Ergonomics scores 54.2 — up to +9.2 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/unikraft/apis.yml: open an issue on github.com/api-evangelist/unikraft to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

Unikraft Cloud Platform API

This specification describes the Unikraft Cloud Platform API, which provides mechanisms to interact with Unikraft Cloud metros.

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

unikraft-autoscale-create-with-policy

AGENT SKILL

unikraft-create-and-attach-volume

AGENT SKILL

unikraft-create-and-retrieve-service-group

AGENT SKILL

unikraft-create-start-stop-instance

AGENT SKILL

Pricing Plans 1

Published pricing tiers and plan structures.

Unikraft Plans Pricing

4 plans

PLANS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Unikraft Context

120 classes · 174 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Unikraft API Rules

15 rules · 11 errors 3 warnings 1 info

SPECTRAL

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Unikraft Authentication

1 scheme

SECURITY

Unikraft Domain Security

TLSv1.3 · DNSSEC · DMARC

SECURITY

Resources

Get Started 3

Portal, sign-up, and the first successful call

Login

GettingStarted

GettingStarted

DeveloperPortal

DeveloperPortal

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

AgentSkill

LLMsTxt

LLMsTxt

WellKnown

WellKnown

Design & Contract 7

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

Conventions

ErrorCatalog

Conformance

Scroll for all 7

Build 2

SDKs, sample code, and the tooling you integrate with

CLI

CLI

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

Security

Security

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

ChangeLog

ChangeLog

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

TermsOfService

TermsOfService

Pricing

Pricing

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Hosts

Hosts

Source (apis.yml)

aid: unikraft
name: Unikraft
image: https://unikraft.com/images/home-share.jpg
description: Unikraft is an open-source unikernel library operating system (LibOS) that enables developers to build ultra‑lightweight,
  high‑performance virtual machines called unikernels. It provides a fast, secure, and customizable platform for cloud‑native,
  container‑less applications, supporting integration with Docker, Kubernetes, CI/CD pipelines, and various cloud providers.
  The project is community‑driven, offers extensive documentation, tooling, and a marketplace of pre‑built unikernel applications,
  aiming to deliver millisecond‑scale startup times and strong isolation.
url: https://artifacts.apis.io/unikraft/apis.yml
x-type: company
x-source: harvest:vc-portfolio
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-29 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-29'
modified: '2026-10-29'
tags:
- Company
- Unikernel
- OpenSource
- CloudNative
- Performance
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Plans
  url: plans/unikraft-plans-pricing.yml
- type: Spectral
  url: rules/unikraft-rules.yml
- type: JSONLD
  url: json-ld/unikraft-context.jsonld
- type: Vocabulary
  url: vocabulary/unikraft-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: DataModel
  url: data-model/unikraft-data-model.yml
- type: CLI
  url: cli/unikraft-cli.yml
- type: Conventions
  url: conventions/unikraft-conventions.yml
- type: Authentication
  url: authentication/unikraft-authentication.yml
- type: ErrorCatalog
  url: errors/unikraft-problem-types.yml
- type: Conformance
  url: conformance/unikraft-conformance.yml
- type: LLMsTxt
  url: llms/unikraft-llms.txt
- type: WellKnown
  url: well-known/unikraft-well-known.yml
- type: Hosts
  url: hosts/unikraft-hosts.yml
- type: TermsOfService
  url: https://unikraft.com/company/legal/terms
- type: Security
  url: https://github.com/moby/buildkit/security/advisories/GHSA-f2v9-hprr-32q3
- type: Pricing
  url: https://unikraft.com/pricing
- type: Login
  url: https://console.unikraft.com/auth/signin
- type: GitHubOrganization
  url: https://github.com/skuenzer
- type: ChangeLog
  url: https://unikraft.com/docs/releases/index
- type: GettingStarted
  url: https://unikraft.com/docs/sdks/js
- type: DomainSecurity
  url: security/unikraft-domain-security.yml
- type: Website
  url: https://unikraft.com
- type: Documentation
  url: https://unikraft.org/docs
- type: DeveloperPortal
  url: https://unikraft.org
- type: Blog
  url: https://unikraft.org/blog
apis:
- name: Unikraft Cloud Platform API
  description: This specification describes the Unikraft Cloud Platform API, which provides mechanisms to interact with Unikraft
    Cloud metros.
  humanURL: https://unikraft.com/docs/platform
  baseURL: null
  properties: []
  aid: unikraft:unikraft-cloud-platform-api
x-backed-by:
- heavybit
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  method: derived
  generated: '2026-10-29'
  generator: derive-coverage.py (pre-flight evidence)
  detail: the company publishes developer documentation but serves no machine-readable contract from it
  evidence:
  - url: https://unikraft.com
    status: 200
x-enrichment:
  date: '2026-10-29'
  status: enriched
  artifacts_added: 33
  pass: modular-v1
  engine: identity=local,contract=local,surfaces=local,docs=local,regulatory=local

Unikraft API — frequently asked questions

Does Unikraft have an API?

Yes. APIs.io lists 1 API from Unikraft, including Unikraft Cloud Platform API.

How do I authenticate with the Unikraft API?

Unikraft documents its authentication (1 scheme). The details are profiled on APIs.io as Unikraft Authentication.

How much does the Unikraft API cost?

APIs.io lists 4 pricing plans for Unikraft, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the Unikraft API ready for AI agents?

Unikraft has a Kin Score of 43.0 out of 100 (developing) and an Agent Readiness score of 15.3 (agent-aware), scored by API Evangelist on 2026-10-31.

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Tools for providers

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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.

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