SandyWP is a WordPress sandbox platform for creating disposable, real WordPress installs in seconds. It gives you a live URL, wp-admin access, and a working database so you can test plugins, themes, ideas, and bug fixes without touching production sites.
The product is aimed at WordPress builders who need quick throwaway environments as well as repeatable test setups. The site and docs show workflows for cloning a live site, deploying from Git, launching from templates, using the CLI or HTTP API, and triggering deployments from Slack.