Build on KeepKey Today with Our New SDK

Explore the KeepKey SDK on NPM (opens in a new tab)


We're revolutionizing the KeepKey ecosystem by unveiling a new developer SDK, alleviating major points of friction.


  • WebUSB: The web protocol for your host machine to communicate with your KeepKey Device.
  • HID: The native USB protocol for communication between your host machine and your KeepKey Device.
  • Browser: Web browsers like Chrome or Brave.
  • Electron: A native application framework running on your host machine outside of a web browser.

Now, What's Possible?

For the first time with a KeepKey, you can:

  • Have Firefox open and pair a KeepKey with
  • Pair the same KeepKey with a Chrome tab.
  • Use KeepKey Desktop’s built-in browser with ShapeShift open.

All applications are connected and functional simultaneously, offering seamless interaction.

The Challenge Before

WebUSB was the main interface for KeepKey prior to our acquisition, which imposed a significant limitation: it only allowed a single application to access the device at a time due to the claimInterface feature.

The Solution: The New KeepKey Desktop

KeepKey desktop now serves as the primary interface for building on KeepKey. It supplies native HID USB drivers, manages advanced features like PIN management in BIP39 mnemonics, and importantly, introduces a new KeepKey REST interface hosted on the user's localhost.

Introducing the KeepKey REST Interface

KeepKey REST Interface

Developer documentation is accessible at http://localhost:1645/docs or through the KeepKey app's settings.

KeepKey-SDK: The New Developer Kit

Developers now have complete access to the KeepKey's REST API and TypeScript typing for coding assistance through the KeepKey-SDK.

Case Study: Integration

The HDwallet package is at the heart of, integrating the REST interface.

ShapeShift Integration
Multiple Application Connectivity
KeepKey Usage Demonstration

You can see a live demonstration of this feature:

This new KeepKey REST API paves the way for future innovative applications to integrate and offer users a self-custody solution.