Mirage JS website screenshot

Mirage JS

Mirage JS is an open source API mocking library for JavaScript that lets you build, test, and share complete frontend features without depending on a backend. It runs alongside your frontend code as in-browser middleware, providing a built-in database, factories for seeding data, route handlers, and serializers. It is framework-agnostic and works with React, Vue, Angular, Ember, and any modern test runner. Mirage JS is itself a library (not a hosted REST API), so this entry indexes its documentation and project resources.

Mirage JS publishes 1 API on the APIs.io network. Tagged areas include API Mocking, Testing, JavaScript, and Open-Source.

Mirage JS’s developer surface includes GitHub presence and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub
15.1/100 emerging ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0
AccessFreemium
1 APIs
API MockingTestingJavaScriptOpen-Source

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-09-14 · rubric v0.22.0
Composite quality — 15.1/100 · emerging
Contract Quality 0.0 / 25
Developer Ergonomics 5.2 / 20
Access Clarity 3.2 / 20
Operational Transparency 1.7 / 13
Contract Governance 0.0 / 12
Discoverability 5.0 / 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/mirage-js: 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 1

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

Mirage JS

Mirage JS is a JavaScript library for mocking APIs. It enables frontend developers to build complete features, write realistic tests, and share working prototypes without a real...

Pricing Plans 1

Published pricing tiers and plan structures.

Mirage Js Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Mirage Js Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Mirage Js Finops

FINOPS

Security Posture 1

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

Mirage Js Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Build 1

SDKs, sample code, and the tooling you integrate with

GitHub
GitHub

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Discord
Discord

Company 2

The organization behind the API

Website
Website
 Twitter
Twitter

Source (apis.yml)

apis.yml Raw ↑ 
aid: mirage-js
name: Mirage JS
description: Mirage JS is an open source API mocking library for JavaScript that lets you build, test, and share complete
  frontend features without depending on a backend. It runs alongside your frontend code as in-browser middleware, providing
  a built-in database, factories for seeding data, route handlers, and serializers. It is framework-agnostic and works with
  React, Vue, Angular, Ember, and any modern test runner. Mirage JS is itself a library (not a hosted REST API), so this entry
  indexes its documentation and project resources.
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
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/mirage-js.png
tags:
- API Mocking
- Testing
- JavaScript
- Open-Source
tags_raw:
- API Mocking
- Testing
- JavaScript
- Open Source
created: '2025-01-08'
modified: '2026-04-28'
url: https://raw.githubusercontent.com/api-evangelist/mirage-js/refs/heads/main/apis.yml
specificationVersion: '0.23'
apis:
- aid: mirage-js:mirage-js
  name: Mirage JS
  description: Mirage JS is a JavaScript library for mocking APIs. It enables frontend developers to build complete features,
    write realistic tests, and share working prototypes without a real backend. Mirage runs in the browser as middleware,
    includes a built-in database and factories, and supports any major JavaScript framework.
  humanURL: https://miragejs.com/
  tags:
  - API Mocking
  - Testing
  - JavaScript
  properties:
  - type: Documentation
    url: https://miragejs.com/docs/getting-started/introduction/
  - type: GettingStarted
    url: https://miragejs.com/quickstarts/
  - type: Tutorial
    url: https://miragejs.com/tutorial/intro/
  - type: APIReferenceDocumentation
    url: https://miragejs.com/api/classes/server/
  - type: GitHub
    url: https://github.com/miragejs/miragejs
  - type: REPL
    url: https://miragejs.com/repl/
common:
- type: DomainSecurity
  url: security/mirage-js-domain-security.yml
- type: Website
  url: https://miragejs.com/
- type: GitHub
  url: https://github.com/miragejs/miragejs
- type: Discord
  url: https://discord.gg/pPsdsrn
- type: Twitter
  url: https://twitter.com/miragejs
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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