Mockserver

Name: Mockserver
Author: mock-server

by mock-serverversion 9.2.0i★ –iRuns on your computer

Registry namecom.mock-server/mockserver

Install

Overview

Description from the maker (original English)

Mock, record/replay, verify and chaos-test any HTTP, REST, gRPC or LLM dependency over MCP.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: Streamable HTTP
Category: Search & AI memory

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

DockerDocker installed

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "mockserver": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "docker.io/mockserver/mockserver:9.2.0"
      ]
    }
  }
}

Run this in your terminal

claude mcp add mockserver -- docker run -i --rm docker.io/mockserver/mockserver:9.2.0

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "mockserver": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "docker.io/mockserver/mockserver:9.2.0"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "mockserver": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "docker.io/mockserver/mockserver:9.2.0"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain mock-server.com (the registry checks domain ownership)
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Search & AI memoryi

More stars than 0% of the other 7230 servers in this category
Published to the registry more recently than 77% of the other 7230 servers in this category
Basic checks equal to or better than 100% of the other 7230 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Mockserver safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (9.2.0) reached the registry 10 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Docker on your computer.

What can I use instead?

In the same category: Context7, Codebase Memory, Exa

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Context7

by upstash

Feeds AI the latest docs for libraries and frameworks before it answers, so code it writes does not use outdated, removed functions.

Computer or cloud★ 64,224MITUpdated 3 days ago

Install

Codebase Memory

by DeusData

Codebase knowledge graph for AI agents — 162 languages, sub-ms queries, 99% fewer tokens.

Runs on your computer★ 48,148MITUpdated 20 days ago

Install

Exa

by exa-labs

Connect AI agents to Exa for web search, content fetching, and multi-step research.

Runs in the cloud★ 5,213MITUpdated 44 days ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

MockServer

=====

MockServer mocks, records, and chaos-tests any HTTP(S) dependency your application talks to — one binary, no per-protocol setup.

Why MockServer

One port, every protocol — HTTP/1.1, HTTPS, HTTP/2, gRPC & gRPC-Web, WebSockets and raw TCP are auto-detected from the first bytes of each connection. Beyond that: HTTP/3 (QUIC, experimental), JSON-RPC for MCP/A2A mocking, and AsyncAPI-driven testing against Kafka/MQTT brokers.
Mock, proxy, or both — return canned/templated/callback responses, or sit as a proxy (port forwarding, HTTP proxy, HTTPS tunneling, SOCKS) and record, inspect, and modify real traffic in flight, with full visibility into TLS-encrypted exchanges.
Chaos engineering built in — inject latency, dropped connections, and errors on demand to see how your application copes when a dependency misbehaves.
Mock AI too — chat-completion APIs for OpenAI, Anthropic, Gemini, Bedrock, Azure OpenAI and Ollama (including streaming), plus a built-in MCP server so AI coding assistants can drive MockServer directly.
Generate mocks, don't hand-write them — from an OpenAPI/Swagger spec, with request matching on method, path, query, headers, cookies, and body (JSON, XML, JSONPath, XPath, regex).
Fits your stack — Java, JavaScript/Node, Python, Ruby, Go, .NET, Rust, and PHP clients, plus JUnit and Spring support; runs as Docker, Helm/Kubernetes, a JAR, or a WAR, with a live dashboard and optional clustered state for multi-instance deployments.

See the changelog for what shipped in each version.

Getting started in 60 seconds

Run MockServer with Docker, then mock an endpoint and call it:

# 1. Start MockServer

docker run -d --rm -p 1080:1080 mockserver/mockserver

2. Mock an endpoint: GET /hello -> 200 "Hello World"

(MockServer exposes a REST control plane on the same port)

curl -X PUT http://localhost:1080/mockserver/expectation \ -H 'Content-Type: application/json' \ -d '{ "httpRequest": { "method": "GET", "path": "/hello" }, "httpResponse": { "statusCode": 200, "body": "Hello World" } }'

3. Call your mock

curl http://localhost:1080/hello

-> Hello World

…or, on macOS / Linux, install with Homebrew and run the mockserver command directly:

brew install mockserver

mockserver run --port 1080

For every way to run MockServer — Docker, docker-compose recipes, the mockserver CLI, a JVM-less binary bundle, Helm/Kubernetes, the JAR, and Testcontainers — see the Self-Hosting MockServer guide. The same setup can be driven from any client library or the dashboard at http://localhost:1080/mockserver/dashboard.

One-command recipes

The examples/docker-compose recipes are a single docker compose up each — mock from an OpenAPI spec, a record/replay proxy, a contract-validating proxy, or a chaos proxy:

cd examples/docker-compose/mock-from-openapi

docker compose up curl http://localhost:1080/pets

Drive it from Postman or Bruno

Postman — click the button above, or import examples/postman (guide).
Bruno (open-source, git-native) — open examples/bruno in Bruno via Open Collection (guide).

Install

Channel	Command
Docker	`docker run -d --rm -p 1080:1080 mockserver/mockserver`
Docker from GitHub Container Registry (avoids Docker Hub's pull limit)	`docker run -d --rm -p 1080:1080 ghcr.io/mock-server/mockserver`
Homebrew (macOS/Linux)	`brew install mockserver`
Helm (chart guide)	`helm upgrade --install --namespace mockserver mockserver oci://ghcr.io/mock-server/charts/mockserver`
Maven Central	`org.mock-server:mockserver-netty-no-dependencies` — see all Maven artifacts (server, WARs, JUnit 4/5, Spring, Maven plugin)
npm	`mockserver-node` (start/stop)

Client libraries (create expectations, verify requests, drive the control plane from your tests):

Full install options (SNAPSHOT repository, WAR deployment, Testcontainers modules, package-manager channels) are on the Self-Hosting guide and Where to find MockServer.

Requirements

Runtime: Java 17+ (raised from Java 11 in MockServer 6.0.0 — see the Java 17 / Jakarta upgrade guide; pin to 5.15.x if you need Java 11). The official Docker image bundles its own JVM, so containerised users need no JVM of their own.

Building from source: JDK 17+.

Security note: MockServer is a development and testing tool only — see SECURITY.md.

Documentation

Usage guide: www.mock-server.com
Architecture, code structure, infrastructure, and operations docs: docs/
AI/MCP integration: built-in MCP server at /mockserver/mcp — see llms.txt and the AI Integration docs

Versions

What changed: changelog and GitHub releases (every version is also a git tag mockserver- ).
API docs for a version: Java API at https://mock-server.com/versions/ /apidocs/index.html; REST API on SwaggerHub (one spec per major.minor.x).
Java 11: the last Java 11-compatible release is 5.15.0 (January 2023).

6.0.0 breaking change: the shaded Maven form was removed. Replace mockserver-netty: :shaded with mockserver-netty-no-dependencies: (same shaded bytes, new coordinates).

Community & Contributing

Issues / bugs / feature requests: GitHub Issues — please include your MockServer version, how you're running it (Docker, Maven plugin, etc.), and INFO-level (or higher) log output.
Discussions: GitHub Discussions
Roadmap: GitHub Project
Security policy: SECURITY.md
Community tools: MockServer Browser Admin, a React + TypeScript web UI for managing expectations
Contributing: pull requests are very welcome — read CONTRIBUTING.md first, then check the open issues and let us know if you intend to work on something.

Maintainers

James D Bloom

Mockserver

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Search & AI memoryi

Common questions

Alternatives

Context7

Codebase Memory

Exa

README from the maker

Why MockServer

Getting started in 60 seconds

2. Mock an endpoint: GET /hello -> 200 "Hello World"

(MockServer exposes a REST control plane on the same port)

3. Call your mock

-> Hello World

One-command recipes

Drive it from Postman or Bruno

Install

Requirements

Documentation

Versions

Community & Contributing

Maintainers