Mockoon is the easiest and quickest way to design and run mock APIs. No remote deployment, no account required, free and open-source.
It combines a desktop application to design and run mock servers locally, and a CLI (https://mockoon.com/cli/) to self-host your fake APIs. A cloud (https://mockoon.com/cloud/) is also available to collaborate with your team, keep your data in sync, and deploy your mock APIs.
Mockoon offers many features:
Unlimited number of mock local servers and routes
CLI to run your mock in headless environments, CI, etc.
Complete control on routes definition: HTTP methods and statuses, regex paths, file serving, custom headers, etc.
OpenAPI compatibility
Record/logs of all entering and forwarded requests
JSON templating
Proxy forwarding mode
HTTPS support
You can check the complete list on the website: https://mockoon.com/features/
