# Cucumber

**Canonical:** https://apis.io/providers/cucumber/  
**Website:** https://cucumber.io  
**APIs profiled:** 5

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.

## Kin Score — 25.7 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 25.7).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 19.7 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 26.3 |
| Developer Ergonomics | 23.8 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 3.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium — onboarding: unknown, pricing: freemium, trial: no (confidence: medium).

## APIs (5)

- **Cucumber JVM** — Java/JVM implementation of Cucumber supporting Java, Kotlin, Scala, and other JVM languages. Distributed via Maven Central under the io.cucumber group.
- **Cucumber.js** — JavaScript/Node.js implementation of Cucumber for running BDD tests in Node and the browser. Distributed as @cucumber/cucumber on npm.
- **Cucumber Ruby** — Ruby implementation of Cucumber, the original Cucumber project. Distributed as the cucumber gem on RubyGems.
- **Gherkin** — Gherkin is the language used to write Cucumber feature files. Parsers are published per language and emit Cucumber Messages that downstream tools consume.
- **Cucumber Messages** — Protocol-buffer / JSON Schema specification of the messages exchanged between Cucumber components (parsers, runners, formatters). Implemented across all language ports for consi...

## Security (1)

- **Cucumber Domain Security** — TLSv1.3 · DMARC

## Plans (1)

- **Cucumber Plans Pricing**

## Tags

Automation, BDD, Behavior-Driven Development, Gherkin, Open-Source, Quality Assurance, Test Framework, Testing

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/cucumber/). Scores are computed from the provider's own public artifacts under a published rubric.