The open source mock API platform
Turn an OpenAPI spec or plain JSON files into a hosted mock server in seconds. One shareable URL for your frontend, your tests and your team. Free at small scale, ready for enterprise.
Live in seconds
Upload the spec, call the URL
Hosted worldwide
Answers near whoever calls
MIT licensed
Run the mock server yourself
Free tier
No card, no tricks
Your mock server is ready.
- Realistic responses generated from your schemas
- One stable URL to share with the team
- Latency and errors on demand
Upload in the app
Drop a spec or JSON files, get a URL.
Push from GitHub
Add one step to a workflow. Every push updates the mock.
Everything you need to mock an API
One platform for API mocking. Hosted mock servers from an OpenAPI spec or plain JSON files, for frontend work, integration tests and demos.
OpenAPI spec or fake JSON API
Point it at an OpenAPI spec for generated responses, or drop JSON files at the paths you want and get those exact responses back. No spec required.
Hosted mock servers
No local mock server, no Docker, no port conflicts. One stable, shareable URL the whole team can call.
PR environments
Add the GitHub Action and every pull request gets its own mock API URL. Test the integration before you merge.
Set up in seconds
Add a spec and the mock server is live. No servers to run, no config to maintain.
Realistic responses
Schema-generated data, latency and error injection to simulate failures, and proxy fallback to the real API.
Open source engine
The mock server is MIT licensed. Run it on your laptop, run it in CI, or let us host it for you.
For one developer or a whole company
Free plan
Nothing to run, nothing to pay.
- Upload a spec, get a mock server in seconds
- A hosted mock server on a shareable URL
- The same open source engine runs on your laptop
Enterprise
Dedicated infrastructure, sized to your traffic.
- Your own account and your own domain
- Thousands of requests per second
- Realistic failures on demand: latency, errors, proxy fallback
Create a mock API in three steps
Add your OpenAPI spec
Upload it in the app, or add one step to a GitHub workflow.
Get a hosted mock server
Mockzilla reads the spec and generates realistic responses. Live in seconds.
Share the URL
One stable URL for your frontend, your tests and your team.
How Mockzilla compares
Hosted, spec-driven API mocking with an open source engine underneath.
| Feature | Mockzilla | Stoplight Prism | Mockoon | WireMock |
|---|---|---|---|---|
| Reads your OpenAPI spec | Imports a copy | Cloud only | ||
| Free hosted plan | ||||
| Paid plans from | $10/mo | $56/mo | $145/mo | Sales quote |
| A mock URL per pull request | ||||
| GitHub Action | Local mock only | |||
| Deploy without signing up | ||||
| Build your own plan, no sales call |
Prices with monthly billing, from each pricing page in September 2026. Full comparisons: Stoplight Prism · Mockoon · WireMock
Bring a spec. Get a mock server.
It costs nothing to start. Dedicated infrastructure when you need it.