Cucumber

Cucumber is an open-source Behavior Driven Development (BDD) tool for running automated tests written in plain language using the Gherkin syntax. It enables collaboration between technical and non-technical team members by expressing executable specifications as Given/When/Then scenarios. Cucumber has implementations for many languages (JVM, JavaScript, Ruby, .NET, Python, Go, Rust) and a shared message protocol that connects parsers, runners, and reporters.

Cucumber publishes 5 APIs on the APIs.io network. Tagged areas include Automation, BDD, Behavior Driven Development, Gherkin, and Open Source.

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

Cucumber’s developer surface includes documentation, tooling, YouTube channel, engineering blog, and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

36.6/100 thin ▼ -5.3 Agent 3/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemium

5 APIs

AutomationBDDBehavior Driven DevelopmentGherkinOpen SourceQuality AssuranceTest FrameworkTesting

Kin Score

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

Composite quality — 36.6/100 · thin

Contract Quality 5.7 / 25

Developer Ergonomics 3.5 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.8 / 13

Governance 8.3 / 12

Discoverability 6.5 / 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/cucumber: 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 5

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

Rate Limits 1

Documented rate limits and quota policies.

Cucumber Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

JSON Schema 1

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

Documentation 3

Reference material describing how the API behaves

Documentation

Documentation

Reference

Reference

JSONSchema

JSONSchema

Design & Contract 2

Pagination, idempotency, versioning, errors, and events

JSONLDContext

JSONLDContext

Vocabulary

Vocabulary

Build 2

SDKs, sample code, and the tooling you integrate with

Tools

Tools

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Learn 1

Tutorials, courses, talks, and written guidance

YouTube

YouTube

Operate 1

Status, limits, changes, and where to get help

Slack

Slack

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

School

School

Source (apis.yml)

aid: cucumber
url: https://raw.githubusercontent.com/api-evangelist/cucumber/refs/heads/main/apis.yml
kind: opensource
name: Cucumber
description: Cucumber is an open-source Behavior Driven Development (BDD) tool for running automated tests written in plain
  language using the Gherkin syntax. It enables collaboration between technical and non-technical team members by expressing
  executable specifications as Given/When/Then scenarios. Cucumber has implementations for many languages (JVM, JavaScript,
  Ruby, .NET, Python, Go, Rust) and a shared message protocol that connects parsers, runners, and reporters.
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/cucumber.png
tags:
- Automation
- BDD
- Behavior Driven Development
- Gherkin
- Open Source
- Quality Assurance
- Test Framework
- Testing
type: Index
specificationVersion: '0.19'
created: '2024-01-01'
modified: '2026-04-28'
apis:
- aid: cucumber:cucumber-jvm
  name: Cucumber JVM
  description: Java/JVM implementation of Cucumber supporting Java, Kotlin, Scala, and other JVM languages. Distributed via
    Maven Central under the io.cucumber group.
  humanURL: https://github.com/cucumber/cucumber-jvm
  baseURL: https://github.com/cucumber/cucumber-jvm
  tags:
  - BDD
  - Java
  - JVM
  - Kotlin
  - Scala
  - Testing
  properties:
  - type: GitHubRepository
    url: https://github.com/cucumber/cucumber-jvm
  - type: Documentation
    url: https://cucumber.io/docs/cucumber/
  - type: PackageIndex
    url: https://search.maven.org/search?q=g:io.cucumber
- aid: cucumber:cucumber-js
  name: Cucumber.js
  description: JavaScript/Node.js implementation of Cucumber for running BDD tests in Node and the browser. Distributed as
    @cucumber/cucumber on npm.
  humanURL: https://github.com/cucumber/cucumber-js
  baseURL: https://github.com/cucumber/cucumber-js
  tags:
  - BDD
  - JavaScript
  - Node.js
  - Testing
  properties:
  - type: GitHubRepository
    url: https://github.com/cucumber/cucumber-js
  - type: Documentation
    url: https://github.com/cucumber/cucumber-js/blob/main/docs/
  - type: PackageIndex
    url: https://www.npmjs.com/package/@cucumber/cucumber
- aid: cucumber:cucumber-ruby
  name: Cucumber Ruby
  description: Ruby implementation of Cucumber, the original Cucumber project. Distributed as the cucumber gem on RubyGems.
  humanURL: https://github.com/cucumber/cucumber-ruby
  baseURL: https://github.com/cucumber/cucumber-ruby
  tags:
  - BDD
  - Ruby
  - Testing
  properties:
  - type: GitHubRepository
    url: https://github.com/cucumber/cucumber-ruby
  - type: Documentation
    url: https://cucumber.io/docs/cucumber/
  - type: PackageIndex
    url: https://rubygems.org/gems/cucumber
- aid: cucumber:gherkin
  name: Gherkin
  description: Gherkin is the language used to write Cucumber feature files. Parsers are published per language and emit Cucumber
    Messages that downstream tools consume.
  humanURL: https://github.com/cucumber/gherkin
  tags:
  - DSL
  - Gherkin
  - Parser
  properties:
  - type: GitHubRepository
    url: https://github.com/cucumber/gherkin
  - type: Reference
    url: https://cucumber.io/docs/gherkin/reference/
- aid: cucumber:cucumber-messages
  name: Cucumber Messages
  description: Protocol-buffer / JSON Schema specification of the messages exchanged between Cucumber components (parsers,
    runners, formatters). Implemented across all language ports for consistent reporting.
  humanURL: https://github.com/cucumber/messages
  tags:
  - Protocol
  - JSON Schema
  - Messages
  properties:
  - type: GitHubRepository
    url: https://github.com/cucumber/messages
  - type: JSONSchema
    url: json-schema/cucumber-message-schema.json
features:
- name: Plain-Language Specifications
  description: Tests written in Gherkin (Given/When/Then) readable by non-engineers.
- name: Multi-Language Implementations
  description: First-class implementations for JVM, JavaScript, Ruby, .NET, Python, Go, and Rust.
- name: Step Definitions and Cucumber Expressions
  description: Pattern-matched code bindings for Gherkin steps via regex or Cucumber Expressions.
- name: Hooks and Tags
  description: Before/After hooks plus tag-driven scenario selection and configuration.
- name: Cucumber Messages Protocol
  description: Shared message format for parsers, runners, and formatters across implementations.
- name: Pluggable Formatters
  description: Built-in pretty, JSON, JUnit, and HTML reporters; third-party formatters supported.
- name: Parallel Execution
  description: Implementations support parallel scenario execution.
- name: CI Integration
  description: Reports plug into CI systems (GitHub Actions, Jenkins, GitLab) via JUnit/HTML output.
useCases:
- name: Acceptance Testing
  description: Product, QA, and engineering collaborate on acceptance tests written in Gherkin.
- name: Living Documentation
  description: Feature files double as up-to-date documentation of system behavior.
- name: API Contract Testing
  description: BDD scenarios verify external API contracts and integrations.
- name: Regression Suites
  description: Tagged scenarios provide selectable regression suites for CI.
- name: Cross-Team Communication
  description: Bridges product, QA, and engineering with a shared specification language.
common:
- type: DomainSecurity
  url: security/cucumber-domain-security.yml
- type: Website
  url: https://cucumber.io
- type: Documentation
  url: https://cucumber.io/docs
- type: Reference
  url: https://cucumber.io/docs/gherkin/reference/
- type: School
  url: https://school.cucumber.io
- type: Tools
  url: https://cucumber.io/tools
- type: GitHubOrganization
  url: https://github.com/cucumber
- type: X
  url: https://twitter.com/cucumberbdd
- type: Slack
  url: https://cucumber.io/community#slack
- type: YouTube
  url: https://www.youtube.com/channel/UCVhQ7ulinkFAkUx3eNvzoEg
- type: JSONSchema
  url: json-schema/cucumber-message-schema.json
- type: JSONLDContext
  url: json-ld/cucumber-context.jsonld
- type: Vocabulary
  url: vocabulary/cucumber-vocabulary.yml
- type: Blog
  url: https://cucumber.io/blog/atom.xml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

Cucumber

Kin Score

APIs 5

Cucumber JVM

Cucumber.js

Cucumber Ruby

Gherkin

Cucumber Messages

Pricing Plans 1

Cucumber Plans Pricing

Rate Limits 1

Cucumber Rate Limits

FinOps 1

Cucumber Finops

Semantic Vocabularies 1

Cucumber Context

Spectral Rules 1

Cucumber API Rules