Keycard SDK is a Typescript implementation of the Keycard API.
You can install Keycard SDK using npm.
npm install keycard-sdk
For usage examples please check example/example.ts and example/global-platform-example.ts which shows most of the SDK functionality. You can also check Keycard Desktop application which can be used to manage Keycard.
For full documentation please check Keycard Docs page. Since this SDK follows the same structure of the official Java SDK you can use it as a reference.