> ## Documentation Index
> Fetch the complete documentation index at: https://moeck.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Introduction

> MockServer lets you mock and proxy any HTTP or HTTPS service for testing, local development, and CI pipelines.

MockServer is a free, open-source tool that intercepts and controls HTTP and HTTPS traffic. Point your application at MockServer instead of a real service, define what responses to return, and verify the requests your application made.

Use MockServer to:

* **Isolate dependencies** — replace APIs, databases, or third-party services in tests
* **Control edge cases** — simulate slow responses, errors, and unexpected payloads
* **Verify behavior** — assert that your code made the right requests with the right data
* **Proxy live traffic** — inspect, record, and replay real HTTP traffic

## Key features

* **HTTP and HTTPS mocking** — a single port handles both protocols automatically using port unification
* **Flexible request matching** — match on method, path, headers, cookies, query parameters, and body using exact values, regular expressions, XPath, or JSON Schema
* **OpenAPI support** — auto-generate expectations from an OpenAPI v3 specification
* **Response templating** — return dynamic responses using Mustache, Velocity, or JavaScript templates
* **Proxying and recording** — forward requests to real services, record responses, and replay them later
* **Multiple deployment options** — Docker, Kubernetes (Helm), Maven plugin, npm module, standalone JAR, JUnit 4/5, and Spring
* **Multiple client SDKs** — Java, JavaScript, and Ruby clients, plus a REST API usable from any language

<Note>
  MockServer uses port unification so a single port handles HTTP, HTTPS, and SOCKS traffic. You do not need separate ports for different protocols.
</Note>

## Where to go next

<CardGroup cols={2}>
  <Card title="Quick Start" icon="bolt" href="/quickstart">
    Get MockServer running and mock your first request in under 5 minutes.
  </Card>

  <Card title="Running MockServer" icon="server" href="/running-mockserver">
    Deploy via Docker, Helm, Maven, npm, or as a standalone JAR.
  </Card>

  <Card title="Creating expectations" icon="list-check" href="/mocking/expectations">
    Define request matchers and response actions to control what MockServer returns.
  </Card>

  <Card title="REST API reference" icon="code" href="/api/overview">
    Explore the full REST API for managing expectations, verification, and state.
  </Card>
</CardGroup>