API Simulations That Deploy Themselves

Push your OpenAPI spec to GitHub. Get a dedicated simulation URL in seconds. No config, no servers, no waiting.

terminal

$ git push origin main

✓ SimDeployment deployed
 URL: https://api.mockz.io/gh/acme/payments/main/

Everything you need to simulate APIs

Drop your OpenAPI spec into your repo. Mockzilla generates a live simulation that matches your API contract exactly.

Every pull request gets its own simulation URL. Test integrations before merging, not after.

One stable URL for the whole team. No local servers, no port conflicts, no "works on my machine".

Add the GitHub Action. Push your spec. That's it. No GUI, no setup wizard, no infrastructure to manage.

Start from our GitHub template. One click to add the workflow to your repo.

Commit and push. The action triggers provisioning automatically on every push.

Your simulation is accessible at a stable URL. Every team member can use it immediately.

The only spec-driven, hosted simulation platform built around the GitHub PR lifecycle.