Lucy responds to commands sent via email. Email Lucy with the subject "blink" and a colour in the body of the message and she will blink that colour. Set the subject to static and she'll stay at whatever colour you specify, either through a keyword or using RGB values.
Anything that can send email can talk with Lucy. This is email as an API, without having to write a specific API. Have a device or a service that can send email? Then it can automatically talk with Lucy. In our research we hooked it up to ifttt.com, without having to create any kind of specific channel, and had it telling us changes in the weather, sending us alerts to remind us about important appointments and anything else we could think of.
Part of the Six Monkeys project for Mailchimp. See more at brendandawes.com/projects/sixmonkeys/