Jest

Jest is a delightful JavaScript testing framework with a focus on simplicity. It works with projects using Babel, TypeScript, Node, React, Angular, Vue and more. Jest provides snapshot testing, parallel execution, built-in mocking, and code coverage out of the box.

Jest publishes 3 APIs on the APIs.io network. Tagged areas include JavaScript, Mocking, Snapshot Testing, Testing, and Unit Testing.

Jest’s developer surface includes documentation, engineering blog, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

15.3/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0

AccessFreemium

3 APIs

JavaScript MockingSnapshot TestingTesting Unit Testing

Kin Score

Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0

Composite quality — 15.3/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 4.3 / 20

Access Clarity 3.2 / 20

Operational Transparency 1.4 / 13

Contract Governance 0.0 / 12

Discoverability 6.5 / 10

Agent readiness — 3/100 · 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 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

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/jest: 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 →

APIs 3

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

Jest Core API

Core testing framework API for writing and running tests, including globals, expect assertions, mock functions, and configuration options.

Jest CLI

Command-line interface for running Jest tests with various options.

Jest Configuration API

Programmatic configuration options for customizing Jest behavior.

Pricing Plans 1

Published pricing tiers and plan structures.

Jest Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Jest Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Jest Finops

FINOPS

Security Posture 1

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

Jest Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Community

Community

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: jest
name: Jest
description: Jest is a delightful JavaScript testing framework with a focus on simplicity. It works with projects using Babel,
  TypeScript, Node, React, Angular, Vue and more. Jest provides snapshot testing, parallel execution, built-in mocking, and
  code coverage out of the box.
type: Index
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: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://jestjs.io/img/jest.png
tags:
- JavaScript
- Mocking
- Snapshot Testing
- Testing
- Unit Testing
url: https://raw.githubusercontent.com/api-evangelist/jest/refs/heads/main/apis.yml
created: '2024-01-01'
modified: '2026-03-16'
specificationVersion: '0.23'
apis:
- aid: jest:jest-core-api
  name: Jest Core API
  description: Core testing framework API for writing and running tests, including globals, expect assertions, mock functions,
    and configuration options.
  humanURL: https://jestjs.io/docs/api
  tags:
  - Assertions
  - Mocking
  - Testing
  properties:
  - type: Documentation
    url: https://jestjs.io/docs/getting-started
  - type: Reference
    url: https://jestjs.io/docs/api
- aid: jest:jest-cli
  name: Jest CLI
  description: Command-line interface for running Jest tests with various options.
  humanURL: https://jestjs.io/docs/cli
  tags:
  - CLI
  - Command Line
  properties:
  - type: Documentation
    url: https://jestjs.io/docs/cli
- aid: jest:jest-configuration
  name: Jest Configuration API
  description: Programmatic configuration options for customizing Jest behavior.
  humanURL: https://jestjs.io/docs/configuration
  tags:
  - Configuration
  - Setup
  properties:
  - type: Documentation
    url: https://jestjs.io/docs/configuration
common:
- type: DomainSecurity
  url: security/jest-domain-security.yml
- type: Website
  url: https://jestjs.io
- type: Documentation
  url: https://jestjs.io/docs/getting-started
- type: Blog
  url: https://jestjs.io/blog
- type: GitHubOrganization
  url: https://github.com/jestjs
- type: Community
  url: https://discord.gg/j6FKKQQrW9
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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