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 is listed with 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 7 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

11.6/100 emerging ▬ flat Agent 1/100 human only Front door AI 1/6 silent Heartbeat 50/100 alive Full breakdown ↓
scored 2026-11-13 · rubric v0.28.0 · Show this score on your site →

AccessFreemium

3 APIs

JavaScript MockingSnapshot TestingTesting Unit Testing

Kin Score

Kin Score How this is scored →
scored 2026-11-13 · rubric v0.28.0

Composite quality — 11.6/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 4.0 / 17

Access Clarity 1.1 / 17

Operational Transparency 1.3 / 11

Contract Governance 0.0 / 10

Discoverability 5.3 / 9

Regulatory Posture 0.0 / 15

Agent readiness — 1/100 · 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

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 Ask about this →
MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship Ask about this →
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author Ask about this →
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey) Ask about this →
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) Ask about this →
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes Ask about this →

12 more unmet checks in the Agent Readiness table above.

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

Contract Quality scores 0.0 — up to +25.0 composite points Ask about this →
Access Clarity scores 6.4 — up to +18.7 composite points Ask about this →
Developer Ergonomics scores 23.8 — up to +15.2 composite points Ask about this →

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.

Not sure how this applies to your stack? Ask about any one item. Kin Lane reads every question, looks at your profile and your situation, and replies with what a fix would take — scoped to that one area, priced up front, yours whether you ship it or not. Ask a question →

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/jest/apis.yml: open an issue on github.com/api-evangelist/jest 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 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.

Jest API pricing

Not yet checked against Jest's own pricing page. Compiled by API Evangelist on 2026-05-04; confirm before you rely on a figure. A free plan or tier is listed.

Plan	Price
Free freemium	Free
Professional paid	Free
Enterprise enterprise	—

Plan details, limits and sources →

Rate limits

Free Tier Default: 10 requests per minute
Free Tier Monthly Quota: 1000 requests per month
Professional Tier Default: 100 requests per minute

Compiled by API Evangelist, not yet checked against Jest's documentation. All 5 limits →

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 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Community

Community

Commercial 2

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

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: low
  source:
  - plans
  - security
  generated: '2026-11-13'
  method: derived
image: https://jestjs.io/img/jest.png
x-docs-platform: docusaurus
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
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: Plans
  url: plans/jest-plans-pricing.yml
- type: RateLimits
  url: rate-limits/jest-rate-limits.yml
- type: FinOps
  url: finops/jest-finops.yml
- 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

Jest API — frequently asked questions

Does Jest have an API?

Yes. APIs.io lists 3 APIs from Jest, including Jest Core API, Jest CLI and Jest Configuration API.

How much does the Jest API cost?

APIs.io lists 3 pricing plans for Jest, with each plan's price, limits and inclusions under Pricing on this page.

Is the Jest API ready for AI agents?

Jest has a Kin Score of 11.6 out of 100 (emerging) and an Agent Readiness score of 0.6 (human-only), scored by API Evangelist on 2026-11-13.

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