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Anthropic Launches Bluetooth API for Claude to Connect With Hardware Devices

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Anthropic introduced a Bluetooth Low Energy (BLE) API for the Claude desktop app, specifically supporting Claude Cowork and Claude Code. This interface allows external microcontrollers to subscribe to the model's internal state, including processing status, token-based level-ups, and pending permission requests.

As agentic AI becomes more common, the human-in-the-loop requirement creates a bottleneck. Moving these interactions to physical peripherals allows for ambient oversight, where a desk device can alert a user to a pending approval without them needing to keep the terminal window in focus.

You can access the API by enabling Developer Mode in the desktop app's troubleshooting menu. A reference implementation called Claude Desktop Buddy is available on GitHub, featuring an ESP32-based desk pet that reacts with animations and allows for physical "Approve" or "Deny" button presses.

Felix Rieseberg
Felix Rieseberg
@felixrieseberg
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Hi! I'm here with *another launch*, it just happens to be extremely niche, nerdy, and probably only for a handful of people. In the desktop app, Claude Cowork and Code now have a little Bluetooth API for makers & developers, allowing you to build hardware devices that interact with Claude. I, for instance, built a little desk pet that alerts me whenever Claude is waiting for permission.

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