Mockoon

Name: Mockoon
Brand: Mockoon

Fast, offline-first tool for designing and running mock REST APIs.

softwareAPI Toolsapi-mockingrest-apioffline-first

What is Mockoon?

Mockoon is a desktop and CLI tool for creating and running mock REST APIs locally, without needing a remote server or an account. It offers an intuitive interface for designing realistic mock endpoints, with support for dynamic templating, rules-based response matching, JSON databases, proxy mode, and OpenAPI specification compatibility. The core desktop application and CLI are free and open source, while Mockoon Cloud adds paid capabilities like real-time team collaboration, cloud-hosted mock deployments, and automatic data synchronization. It is used by frontend and full-stack developers, QA teams, and API designers, including in regulated industries that value its offline-first, privacy-focused design.

SpecificationsAI-estimated

deploymentDesktop App

open source✅ Yes

api available✅ Yes

Key Features of Mockoon

Runs mock REST APIs locally on desktop without requiring an account or remote deployment.

Imports and exports OpenAPI specifications for compatibility with existing API definitions.

Supports dynamic templating and rules-based matching for realistic mock responses.

Includes proxy mode and request recording to capture and replay real API traffic.

Offers a CLI and Docker image for running mocks in automated or self-hosted environments.

Provides serverless deployment options for AWS Lambda, GCP Functions, and Firebase.

Adds real-time team collaboration and cloud-hosted mocks through Mockoon Cloud.

Use Cases for Mockoon

Frontend development without a backend

Mock API responses locally so frontend work can proceed before the backend is ready.

QA and integration testing

Simulate specific API responses and edge cases for reliable, repeatable tests.

API design and prototyping

Design and validate a REST API's behavior before implementing the real service.

CI pipeline mocking

Run mock APIs via CLI or Docker inside automated test pipelines.

Pros & Cons of Mockoon

Pros

Free and open-source desktop app with no account required
Offline-first design suits privacy-sensitive environments
Supports OpenAPI import/export
CLI and Docker support for CI pipelines

Cons

Team collaboration requires the paid Mockoon Cloud tier
Cloud pricing details are not clearly published
Interface is more developer-oriented than no-code friendly

Frequently Asked Questions

Is Mockoon free?

Yes, the Mockoon desktop app and CLI are free and open source; Mockoon Cloud is a separate paid offering.

Does Mockoon support OpenAPI?

Yes, Mockoon can import and export OpenAPI specifications.

Can Mockoon run in CI pipelines?

Yes, Mockoon offers a CLI and Docker image for use in automated testing environments.

Does Mockoon require an account?

No, the desktop application works entirely offline without requiring an account.

Pricing Overview

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Paid (Subscription)

Team

$100/month

Enterprise

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