JUnit

JUnit is a programmer-friendly testing framework for Java and the JVM. JUnit 5 is the next generation of JUnit, composed of three modules: JUnit Platform, JUnit Jupiter, and JUnit Vintage.

JUnit publishes 2 APIs on the APIs.io network. Tagged areas include Java, TDD, Test Automation, Testing, and Unit Testing.

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

JUnit’s developer surface includes documentation and 5 more developer resources.

🌐 Visit website 📡 Source on GitHub

32.1/100 thin ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemium

2 APIs

JavaTDDTest AutomationTestingUnit Testing

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 32.1/100 · thin

Contract Quality 5.7 / 25

Developer Ergonomics 1.7 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.8 / 13

Governance 7.0 / 12

Discoverability 5.0 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

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 7 / 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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/junit: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 2

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

JUnit 5 Jupiter

The next generation of JUnit for Java 8 and beyond, providing an expressive API for writing tests and extensions.

JUnit 4 Vintage

The legacy version of JUnit still widely used in Java projects.

Pricing Plans 1

Published pricing tiers and plan structures.

Junit Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Junit Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Junit Finops

FINOPS

Semantic Vocabularies 1

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

Junit Context

13 classes · 0 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

JUnit API Rules

5 rules · 4 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

JUnit Test Report

1 properties

JSON SCHEMA

Security Posture 1

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

Junit Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

JSONLD

JSONLD

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 1

The organization behind the API

Website

Website

Source (apis.yml)

aid: junit
name: JUnit
description: 'JUnit is a programmer-friendly testing framework for Java and the JVM. JUnit 5 is the next generation of JUnit,
  composed of three modules: JUnit Platform, JUnit Jupiter, and JUnit Vintage.'
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/junit.png
tags:
- Java
- TDD
- Test Automation
- Testing
- Unit Testing
url: https://raw.githubusercontent.com/api-evangelist/junit/refs/heads/main/apis.yml
created: '2024-01-01'
modified: '2026-04-28'
specificationVersion: '0.19'
apis:
- aid: junit:junit5
  name: JUnit 5 Jupiter
  description: The next generation of JUnit for Java 8 and beyond, providing an expressive API for writing tests and extensions.
  humanURL: https://junit.org/junit5/
  tags:
  - Java
  - Testing
  properties:
  - type: Documentation
    url: https://junit.org/junit5/docs/current/user-guide/
  - type: Reference
    url: https://junit.org/junit5/docs/current/api/
  - type: GettingStarted
    url: https://junit.org/junit5/docs/current/user-guide/#overview-getting-started
  - type: ChangeLog
    url: https://junit.org/junit5/docs/current/release-notes/
  - type: GitHub
    url: https://github.com/junit-team/junit5
  - type: JSONSchema
    url: json-schema/junit-report-schema.json
- aid: junit:junit4
  name: JUnit 4 Vintage
  description: The legacy version of JUnit still widely used in Java projects.
  humanURL: https://junit.org/junit4/
  tags:
  - Java
  - Testing
  properties:
  - type: Documentation
    url: https://junit.org/junit4/
  - type: Reference
    url: https://junit.org/junit4/javadoc/latest/
  - type: GitHub
    url: https://github.com/junit-team/junit4
common:
- type: DomainSecurity
  url: security/junit-domain-security.yml
- type: Website
  url: https://junit.org/junit5/
- type: Documentation
  url: https://junit.org/junit5/docs/current/user-guide/
- type: GitHubOrganization
  url: https://github.com/junit-team
- type: License
  url: https://github.com/junit-team/junit5/blob/main/LICENSE.md
- type: JSONLD
  url: json-ld/junit-context.jsonld
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com