Please add cl-kraken

[jonatack]

CL-KRAKEN is an API wrapper for the Kraken cryptocurrency exchange written in Common Lisp that currently enables the public market data API in the Kraken REST API documentation and some of the private user API.

Tested with SBCL, CCL, ABCL, CLISP, and ECL.

Author: Jon Atack
GitHub repository and documentation: https://github.com/jonatack/cl-kraken
Git source: https://github.com/jonatack/cl-kraken.git

Thanks!