Mockoon is an open-source tool under the MIT licence for designing and running mock APIs locally. It consists of a desktop application and a command-line tool that can run from npm, as a Docker image or as a GitHub Action in CI/CD pipelines. Developers use it to simulate API responses without a live back end. The CLI offers the same features as the desktop app. Mockoon Pro adds team collaboration and mock deployments that can be hosted on the organisation's own infrastructure.
The vendor's terms name 1kB SARL-S as the operator, a Luxembourg company that trades as Mockoon. For services that Mockoon operates, the privacy policy names Google Cloud as the hosting platform without stating a region, and lists Cloudflare and Paddle as sub-processors. It refers to standard contractual clauses and data processing agreements where applicable, but does not state an explicit GDPR commitment. The vendor says Mockoon Pro runs on the customer's own infrastructure without telemetry, so an organisation that self-hosts keeps control of its data.