MockServer

MockServer enables easy mocking of any system you integrate with via HTTP or HTTPS (e.g. services, web sites, etc) with clients in Java, JavaScript, and Ruby and a simple REST API. MockServer can be used to mock APIs that are not yet fully developed, isolate the system under test for reliable testing, simulate slow or faulty endpoints, and record/replay requests.

MockServer publishes 3 API contracts indexed on the APIs.io network: Control API, Expectation API, and Verify API. Tagged areas include Mocking, Mock Servers, Testing, Service Virtualization, and HTTP.

MockServer’s developer surface includes documentation, getting-started guide, and 16 more developer resources.

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32.4/100 thin ▬ flat Agent 17/100 agent aware Front door AI 6/6 dominant self hosted · Apache-2.0 Full breakdown ↓
scored 2026-10-23 · rubric v0.25.0 · Show this score on your site →

AccessFreemium

2 published contracts

Mocking Mock Servers Testing Service Virtualization HTTP REST API Platform

Kin Score

Kin Score How this is scored →
scored 2026-10-23 · rubric v0.25.0

Composite quality — 32.4/100 · thin

Contract Quality 6.0 / 16

Developer Ergonomics 2.8 / 13

Access Clarity 1.0 / 13

Operational Transparency 3.1 / 8

Contract Governance 0.0 / 8

Discoverability 4.2 / 7

Regulatory Posture 1.8 / 15

Open Source Surface 10.0 / 10

Create-or-Update Ergonomics 0.0 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

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.

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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 65 points between them, because both conditional facets apply and carry 35 points together. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 65% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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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/mockserver: 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 →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Cloud Native (Kubernetes, CNCF, FinOps)	undeclared	-	1	1
Artifact Hub Cloud-Native Packages	undeclared	-	1	1

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

HTTP

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 3

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

MockServer Control API

Manage state or process (both MockServer & MockServer Proxy)

MockServer Expectation API

Create or update expectations - updates if the id matches an existing expectations (only supported by MockServer)

MockServer Verify API

Verify requests (both MockServer & MockServer Proxy)

Open Collections 4

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

MockServer control API

OPEN COLLECTION

MockServer control expectation API

OPEN COLLECTION

MockServer API

OPEN COLLECTION

MockServer control verify API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Mockserver Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Mockserver Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Mockserver Finops

FINOPS

Security Posture 2

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

Mockserver Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Mockserver Vulnerability Disclosure

security.txt · contact published

SECURITY

Agentic Access 1

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

Mockserver Agentic Access

10 operations · 10 acting · 6 human-in-the-loop

10 operations · 10 acting

AGENTIC

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

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 3

Authentication, authorization, and security posture

SecurityPolicy

SecurityPolicy

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

Releases

Releases

Issues

Issues

Commercial 3

Pricing, plans, and the legal terms of use

Plans

Plans

FinOps

FinOps

License

License

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: mockserver
name: MockServer
description: MockServer enables easy mocking of any system you integrate with via HTTP or HTTPS (e.g. services, web sites,
  etc) with clients in Java, JavaScript, and Ruby and a simple REST API. MockServer can be used to mock APIs that are not
  yet fully developed, isolate the system under test for reliable testing, simulate slow or faulty endpoints, and record/replay
  requests.
type: Index
deliveryModel:
  model: self-hosted
  license: Apache-2.0
  license_evidence:
    repo: mock-server/mockserver
    spdx: Apache-2.0
    stars: 4976
  open_source: true
  commercial: false
  callable_host: false
  label: Self-hosted open source · you run it yourself
  confidence: medium
  source:
  - openapi
  - repository-license
  generated: '2026-09-25'
  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://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/mockserver.png
url: https://raw.githubusercontent.com/api-evangelist/mockserver/refs/heads/main/apis.yml
access: 3rd-Party
created: '2025-01-08'
modified: '2026-05-19'
position: Consuming
specificationVersion: '0.23'
tags:
- Mocking
- Mock Servers
- Testing
- Service Virtualization
- HTTP
- REST API
- Platform
tags_raw:
- Mocking
- Mock Server
- Testing
- Service Virtualization
- HTTP
- REST API
- Platform
apis:
- aid: mockserver:mockserver-control-api
  name: MockServer Control API
  description: Manage state or process (both MockServer & MockServer Proxy)
  humanURL: https://www.mock-server.com/
  baseURL: http://localhost:1080/
  tags:
  - Control
  tags_raw:
  - control
  properties:
  - type: OpenAPI
    url: openapi/mockserver-control-api-openapi.yml
  - type: Documentation
    url: https://www.mock-server.com/
  - type: GettingStarted
    url: https://www.mock-server.com/mock_server/getting_started.html
  - type: GitHubRepository
    url: https://github.com/mock-server/mockserver
- aid: mockserver:mockserver-expectation-api
  name: MockServer Expectation API
  description: Create or update expectations - updates if the id matches an existing expectations (only supported by MockServer)
  humanURL: https://www.mock-server.com/
  baseURL: http://localhost:1080/
  tags:
  - expectation
  properties:
  - type: OpenAPI
    url: openapi/mockserver-expectation-api-openapi.yml
  - type: Documentation
    url: https://www.mock-server.com/
  - type: GettingStarted
    url: https://www.mock-server.com/mock_server/getting_started.html
  - type: GitHubRepository
    url: https://github.com/mock-server/mockserver
- aid: mockserver:mockserver-verify-api
  name: MockServer Verify API
  description: Verify requests (both MockServer & MockServer Proxy)
  humanURL: https://www.mock-server.com/
  baseURL: http://localhost:1080/
  tags:
  - Verify
  tags_raw:
  - verify
  properties:
  - type: OpenAPI
    url: openapi/mockserver-verify-api-openapi.yml
  - type: Documentation
    url: https://www.mock-server.com/
  - type: GettingStarted
    url: https://www.mock-server.com/mock_server/getting_started.html
  - type: GitHubRepository
    url: https://github.com/mock-server/mockserver
common:
- type: Plans
  url: plans/mockserver-plans-pricing.yml
- type: RateLimits
  url: rate-limits/mockserver-rate-limits.yml
- type: FinOps
  url: finops/mockserver-finops.yml
- type: Releases
  url: https://github.com/mock-server/mockserver/releases
- type: SecurityPolicy
  url: https://github.com/mock-server/mockserver-monorepo/blob/master/SECURITY.md
- type: CodeOfConduct
  url: https://github.com/mock-server/mockserver-monorepo/blob/master/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/mock-server/mockserver-monorepo/blob/master/CONTRIBUTING.md
- type: AgenticAccess
  url: agentic-access/mockserver-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/mockserver-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/mockserver-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/mockserver
- type: Website
  url: https://www.mock-server.com/
- type: Documentation
  url: https://www.mock-server.com/
- type: GitHubOrganization
  url: https://github.com/mock-server
- type: GettingStarted
  url: https://www.mock-server.com/mock_server/getting_started.html
- type: Issues
  url: https://github.com/mock-server/mockserver/issues
- type: License
  url: https://github.com/mock-server/mockserver/blob/master/LICENSE.md
- type: LlmsText
  url: https://mock-server.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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