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 13 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.5/100 thin ▬ flat Agent 17/100 agent aware self hosted · MIT Full breakdown ↓
scored 2026-09-14 · rubric v0.22.0

AccessFreemiumOpen⚡ Free to try

1 APIs

Mock Servers Mocking Testing REST API Desktop CLI Platform Open-Source

Kin Score

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

Composite quality — 34.5/100 · thin

Contract Quality 10.4 / 23

Developer Ergonomics 4.3 / 18

Access Clarity 4.3 / 18

Operational Transparency 3.1 / 12

Contract Governance 0.0 / 11

Discoverability 6.0 / 9

Open Source Surface 6.5 / 10

Agent readiness — 17/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 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

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

The six quality facets above are damped to 90 points between them, because the conditional facet above carries the other 10. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 90% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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/mockoon: 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 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 3

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

API Collection

OPEN COLLECTION

Mockoon Admin Data Buckets API

OPEN COLLECTION

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

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

LlmsText

LlmsText

Build 2

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

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 2

Status, limits, changes, and where to get help

Releases

Releases

Issues

Issues

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Company 3

The organization behind the API

LinkedIn

Website

Website

Blog

Blog

Source (apis.yml)

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
deliveryModel:
  model: self-hosted
  license: MIT
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  - openapi
  generated: '2026-08-28'
  method: derived
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: Consuming
specificationVersion: '0.23'
tags:
- Mock Servers
- Mocking
- Testing
- REST API
- Desktop
- CLI
- Platform
- Open-Source
tags_raw:
- 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: Releases
  url: https://github.com/mockoon/mockoon/releases
- type: CodeOfConduct
  url: https://github.com/mockoon/.github/blob/main/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/mockoon/mockoon/blob/main/CONTRIBUTING.md
- type: License
  name: MIT
  url: https://github.com/mockoon/mockoon/blob/main/LICENSE
- 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

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