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Mockoon

mockoon.com APIs & Databases Online toolFreeOpen source

A visual API mocking application with local environments, routes, response configuration and a CLI.

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mockoon.com
Mockoon homepage screenshot

About Mockoon

Mockoon is an open-source tool for designing and running mock REST APIs. It provides a visual interface for creating mock endpoints and response configurations, and the homepage states it runs locally without remote deployment or an account. It supports dynamic templating, rules matching, JSON databases, and proxy mode with request recording and replay.

Mockoon Pro, which is in beta, adds self-hosted team collaboration, data synchronization, and managed mock deployments on the user's own infrastructure. The homepage describes Mockoon as local-first and states that Pro runs with no telemetry on the user's own infrastructure. These are the vendor's descriptions, and they do not guarantee any particular level of privacy or security.

Key features

  • Visual interface for creating mock REST APIs
  • CLI and Docker image for running mocks on servers and headless environments
  • Dynamic templating and rules matching for mock responses
  • JSON databases for mock data
  • Proxy mode with HTTP request recording and replay
  • Compatibility with the OpenAPI specification
Best for: Frontend, mobile, and full-stack developers who need mock REST APIs while a backend is unavailable, and teams that run mock APIs in CI pipelines.
Good for
  • Free and open source, with no account required to run locally
  • Local-first and offline capable, without remote deployment
  • Compatible with the OpenAPI specification
Watch out for
  • Mockoon Pro is listed as available in beta
  • Team collaboration and managed deployments require self-hosting Mockoon Pro on the user's own infrastructure

Mockoon at a glance

Type
Online tool
Pricing
Free
Open source
Yes
Last checked
Oct 9, 2026 · Online when checked
Listed
Oct 9, 2026

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Mockoon FAQ

Can Mockoon run in CI pipelines?
The homepage states that the CLI and Docker image can run mock REST APIs on servers and headless environments, and names GitHub Actions, CircleCI, and TravisCI as examples.
Does Mockoon require an account?
The homepage states that no account is required to run Mockoon locally.
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Listing maintained by Chris McClure and the WebIndexly editors · Updated Oct 13, 2026 · How we rank