This connects Claude to ngrok's API through Membrane, letting you manage tunnels, domains, and endpoints without wrestling with auth tokens. You'd use it when building tools that spin up dev environments, automate webhook testing, or provision secure tunnels programmatically. The Membrane integration handles OAuth and credential refresh automatically, which is genuinely useful since you're not storing API keys in your agent context. It supports both pre-built actions for common operations and a proxy mode for direct API calls when the helpers don't cover your case. Free tier works fine for basic tunnel management.
npx skills add https://github.com/membranedev/application-skills --skill ngrok