Mockoon website screenshot

Mockoon

Mockoon is the easiest and quickest way to design and run mock REST APIs. Available as a free, open-source desktop application and CLI, it lets developers build, share, and serve realistic mock endpoints locally, in CI, or in containers. No remote deployment, no account required.

Mockoon publishes 1 API on the APIs.io network: Data Buckets API. Tagged areas include Mock Servers, Mocking, Testing, REST API, and Desktop.

Mockoon’s developer surface includes documentation, engineering blog, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub
35.5/100 thin ▬ flat Agent 22/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1
AccessFreemiumOpen⚡ Free to try
2 APIs
Mock ServersMockingTestingREST APIDesktopCLIPlatformOpen Source

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1
Composite quality — 35.5/100 · thin
Contract Quality 13.2 / 25
Developer Ergonomics 2.2 / 20
Commercial Clarity 9.5 / 20
Operational Transparency 4.8 / 13
Governance 0.0 / 12
Discoverability 5.9 / 10
Agent readiness — 22/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 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/mockoon: 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 2

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

Mockoon

Mockoon ships as a desktop application, a CLI, and a serverless package for designing and running mock REST APIs. Mocks are configured in Mockoon and exposed locally as HTTP end...

Mockoon Data Buckets API

Inspect and reset data buckets defined in the mock environment.

Open Collections 1

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Mockoon Admin API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Mockoon Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Mockoon Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Mockoon Finops

FINOPS

Security Posture 2

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

Mockoon Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Mockoon Trust Center

PCI DSS, GDPR

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Mockoon Agentic Access

3 operations · 1 acting

3 operations · 1 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LlmsText
LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 2

Authentication, authorization, and security posture

TrustCenter
TrustCenter
 DomainSecurity
DomainSecurity

Learn 1

Tutorials, courses, talks, and written guidance

Tutorials
Tutorials

Operate 1

Status, limits, changes, and where to get help

Issues
Issues

Company 3

The organization behind the API

LinkedIn
LinkedIn
 Website
Website
 Blog
Blog

Source (apis.yml)

apis.yml Raw ↑ 
aid: mockoon
name: Mockoon
description: Mockoon is the easiest and quickest way to design and run mock REST APIs. Available as a free, open-source desktop
  application and CLI, it lets developers build, share, and serve realistic mock endpoints locally, in CI, or in containers.
  No remote deployment, no account required.
type: Index
accessModel:
  pricing: freemium
  onboarding: open
  trial: false
  try_now: true
  public: true
  label: Freemium · Open access
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/mockoon.png
url: https://raw.githubusercontent.com/api-evangelist/mockoon/refs/heads/main/apis.yml
access: 3rd-Party
created: '2025-01-08'
modified: '2026-04-28'
position: Consumer
specificationVersion: '0.19'
tags:
- Mock Servers
- Mocking
- Testing
- REST API
- Desktop
- CLI
- Platform
- Open Source
apis:
- aid: mockoon:mockoon
  name: Mockoon
  description: Mockoon ships as a desktop application, a CLI, and a serverless package for designing and running mock REST
    APIs. Mocks are configured in Mockoon and exposed locally as HTTP endpoints; the tool itself does not publish a remote
    control-plane REST API, so no OpenAPI definition is included in this repository.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://mockoon.com/
  tags:
  - Mock Server
  - Mocking
  - Desktop
  - CLI
  properties:
  - type: Documentation
    url: https://mockoon.com/docs/latest/about/
  - type: GettingStarted
    url: https://mockoon.com/tutorials/getting-started/
  - type: Download
    url: https://mockoon.com/download/
  - type: GitHubRepository
    url: https://github.com/mockoon/mockoon
- aid: mockoon:mockoon-data-buckets-api
  name: Mockoon Data Buckets API
  description: Inspect and reset data buckets defined in the mock environment.
  humanURL: https://mockoon.com/
  tags:
  - Data Buckets
  properties:
  - type: OpenAPI
    url: openapi/mockoon-data-buckets-api-openapi.yml
common:
- type: AgenticAccess
  url: agentic-access/mockoon-agentic-access.yml
- type: TrustCenter
  url: security/mockoon-trust-center.yml
- type: DomainSecurity
  url: security/mockoon-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/mockoon
- type: Website
  url: https://mockoon.com/
- type: Documentation
  url: https://mockoon.com/docs/latest/about/
- type: GitHubOrganization
  url: https://github.com/mockoon
- type: Tutorials
  url: https://mockoon.com/tutorials/
- type: Blog
  url: https://mockoon.com/blog/
- type: Issues
  url: https://github.com/mockoon/mockoon/issues
- type: LlmsText
  url: https://mockoon.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com