https://www.kickstarter.com/projects/selepu/dreampilot-ai-gu...
Found that in seconds. EEG, electrical stimulation, heat, audio, etc. Claims a 20 hour battery.
As to the Claude interactions, like others I am suspicious and it seems overly idealized and simplified. Claude can't search for BT devices, but you could hook it up with an MCP that does that. You can hook it up with a decompiler MCP. And on and on. But it's more involved than this story details.
That appears to be more than a centimeter thick, and not particularly flexible. It's more like ski goggles than a sleep mask.
So yeah, a product exists that claims to be a sleep mask with these features. Maybe someone could even sleep while wearing that thing, as long as they sleep on their back and don't move around too much. I remain skeptical that it actually does the things it claims and has the battery life it claims. This is kickstarter after all. Regardless, this would qualify as the device in question for the article. Or at least inspiration for it.
Without evidence such as wireshark logs, programs, protocol documentation, I'm not convinced that any of this actually _happened_.
Claude, or any good agent, doesn't need MCP to do things. As long as it has access to a shell it can craft any command that it needs to fulfill its prompt.
There are no shell commands to do what is described. I could get Claude to interact with BLE devices, but it did it by writing and running various helper applications, for instance using the Bleak library. So I guess not an MCP per se.