# WireMock Cloud

> WireMock Cloud is a hosted API simulation platform for testing, developing, and demoing against realistic mock APIs — REST, GraphQL, gRPC, and SOAP. It supports stateful simulation, chaos and fault injection, request recording/replay, and native MCP + Agent Skills for agentic development workflows.

## Platform

- [API Simulation](https://www.wiremock.io/platform/api-simulation): Realistic, stateful simulations of every service you depend on.
- [Agentic Development](https://www.wiremock.io/platform/agentic): MCP server and Agent Skills for AI coding agents.
- [Templates](https://www.wiremock.io/platform/templates): Pre-built, ready-made simulations of popular third-party APIs.
- [Runner & CLI](https://www.wiremock.io/platform/runner): Run API simulations locally, in CI, and alongside AI agents.

## Solutions

- [AI Test Environments](https://www.wiremock.io/solutions/ai-testing): Small, deterministic, short-lived simulated environments for AI-driven testing.
- [Agent Cleanroom Testing](https://www.wiremock.io/solutions/cleanroom): A bounded, deterministic environment for developing and testing AI agents.
- [AI Code Quality](https://www.wiremock.io/solutions/code-quality): Verify AI-generated code against realistic simulated environments before it ships.
- [Enterprise Service Virtualization](https://www.wiremock.io/solutions/service-virtualization): Service virtualization for the AI-native enterprise.

## Use cases

- [Meet the Modern Solution to Service Virtualization Challenges](https://www.wiremock.io/use-case/service-virtualization): Replace clunky legacy solutions with modern, cloud-native virtualization software to reduce costs, accelerate delivery, and eliminate overhead.
- [Mock 3rd Party APIs with WireMock Cloud](https://www.wiremock.io/use-case/3rd-party): Reduce dependencies on flaky 3rd parties and sandboxes. Ship faster at lower costs with flexible and realistic API mocking.
- [Mock Internal APIs and Microservices](https://www.wiremock.io/use-case/parallel-development): Prevent bottlenecks in your development process by parallelizing development work between API consumers and API developers.
- [Onboard Developers Faster with an Embedded Mock API Environment](https://www.wiremock.io/use-case/developer-portal): Use WireMock Cloud to mimic the behavior of your production APIs, and integrate the mocks as a sandbox in your developer portal.
- [Test More and Test Faster by Decoupling from Your API Dependencies](https://www.wiremock.io/use-case/scalable-testing-for-qa-and-dev-with-api-virtualization): Unblock your testing strategy with WireMock's API simulation. Test exactly what you need in your application code instead of struggling with flaky and expensive API dependencies.
- [Unlock Parallel Development with Up Front API Prototyping](https://www.wiremock.io/use-case/parallel-development-and-rapid-prototyping): Rapidly mocking new APIs lets teams get going faster and provide feedback earlier.

## Pricing

- [Pricing](https://www.wiremock.io/get-pricing): Free and Enterprise plans.

## Glossary

Definitions of core API testing and simulation concepts:

- [API for testing](https://www.wiremock.io/glossary/api-for-testing): What is an API for Testing, and Where to Find Free Testing APIs
- [API Replay](https://www.wiremock.io/glossary/what-is-api-replay-when-would-you-use-it): API replay is a technique for capturing and reusing real API request and response data to test and debug applications.
- [API Sandbox](https://www.wiremock.io/glossary/api-sandbox): API Sandbox : Definition, Core Features, and When to Use Mocks Instead
- [Chaos Engineering](https://www.wiremock.io/glossary/chaos-engineering): What is Chaos Engineering? How Does It Work?
- [Contract Testing](https://www.wiremock.io/glossary/contract-testing): Learn how Contract Testing is used in API-Driven development, and how it's different from API testing and integration testing.
- [Dummy Server](https://www.wiremock.io/glossary/dummy-server): What is a dummy server? How is it different from a mock server? And how do you set one up?
- [Integration Testing](https://www.wiremock.io/glossary/integration-testing): What is Integration Testing? How Does It Differ from Unit Testing?
- [Microservices Mocking](https://www.wiremock.io/glossary/microservices-mocking): What you need to know about developing and testing microservices using mock API tools.
- [Mock API](https://www.wiremock.io/glossary/mock-api): What is a Mock API? Mocking Explained with Examples
- [Mock Server](https://www.wiremock.io/glossary/mock-server): What is a Mock Server? The Quick Explanation
- [Proxying](https://www.wiremock.io/glossary/proxying-proxying-in-api-mocking-definition-use-cases-and-how-it): Proxy servers function as intermediaries between clients and end servers, handling requests and responses.
- [Service Virtualization](https://www.wiremock.io/glossary/service-virtualization): A Quick and Simple Explanation of Service Virtualization, with an Ecommerce Example
- [Stubbing](https://www.wiremock.io/glossary/stubbing): A stub is a controllable stand-in for a real dependency, returning predefined responses in tests. Learn stub vs mock and how to create API stubs with WireMock.
- [Test-Driven Development](https://www.wiremock.io/glossary/test-driven-development): What is Test-Driven Development? What’s the Point?
- [What is API Prototyping? Prototyping vs Mocking](https://www.wiremock.io/glossary/what-is-api-prototyping-prototyping-vs-mocking): API prototyping is the process of building a working model of an API before proceeding with full development.

## Case studies

- [Ally Financial increased productivity in enterprise testing flows](https://www.wiremock.io/post/ally-financial-chooses-wiremock): Learn how Ally Financial uses WireMock Cloud to increase productivity in enterprise testing flows and speed up development cycles.
- [Bilt Rewards chooses WireMock Cloud to unlock parallel development and get to market faster](https://www.wiremock.io/case-study/bilt-rewards): Learn how Bilt Rewards uses WireMock Cloud to create realistic testing and development environments when integrating third-party APIs and new microservices.
- [How Coface Delivered a Modern API Portal and Dramatically Accelerated Customer Onboarding](https://www.wiremock.io/case-study/coface): Learn how Coface uses WireMock Cloud to create isolated testing environments for its financial APIs, accelerating customer onboarding and testing.
- [ePayPolicy uses WireMock Cloud to remove dependencies on third-party API environments and speed up product development.](https://www.wiremock.io/case-study/epay-policy): Learn how ePayPolicy integrates WireMock to replace limited third-party testing environments with highly configurable, high-availability mock APIs.
- [Cuscal Accelerates and Scales Testing for its Open Banking Implementation with WireMock Cloud](https://www.wiremock.io/case-study/cuscal): Learn how Cuscal uses WireMock Cloud to vastly accelerate testing velocity while eliminating dependencies on client systems and data.
- [FreeWill increases release velocity and quality by adopting API mock-based development and testing](https://www.wiremock.io/case-study/freewill): Learn how the FreeWill team is using WireMock Cloud to improve development testing against financial APIs, without slowing down production.
- [Fortune 100 Development Team Delivers 20% Faster with WireMock Cloud](https://www.wiremock.io/case-study/fortune-100-media-company): Learn how one of the world's largest media companies uses WireMock Cloud to streamline internal API development and boost interdepartmental onboarding, while reducing developer overhead by 20% in the first 4 months after onboarding to WireMock.
- [OVO Energy accelerates its development and testing pipelines by adopting WireMock Cloud for running customer journeys](https://www.wiremock.io/case-study/ovo): Learn how the OVO Energy team is using WireMock Cloud to improve stability and overcome unreliability roadblocks experienced with third-party APIs
- [Jumia uses WireMock Cloud to parallelize development and reduce feature development time by more than three weeks](https://www.wiremock.io/case-study/jumia): Find out how Jumia implements WireMock in their engineering teams' testing and development workflow for shorter release cycles.
- [Zenus Elevates Developer Portal with WireMock Cloud Integration](https://www.wiremock.io/case-study/zenus): Learn how Zenus leverages WireMock Cloud to ensure an optimal customer experience while maintaining release velocity.

## Documentation

- [WireMock Cloud & open-source WireMock documentation](https://docs.wiremock.io/llms.txt)