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Please thoroughly vet everything in the code for yourself before using this gem to buy, sell, or move any of your assets.

PLEASE submit an issue or pull request if you notice any bugs, security holes, or potential improvements. Any help is appreciated!


This gem is a wrapper for the Kraken Digital Asset Trading Platform API. Official documentation from Kraken can be found here.

The current version (0.5.0) can be used to query public/private data and make trades. Private data queries and trading functionality require use of your Kraken account API keys.

Kraken Ruby was built by Alex Leishman and other awesome contributors.

Pending Future Updates

  • More comprehensive test suite for methods requiring authentication (using VCR perhaps)
  • More comprehensive documentation


Add this line to your application's Gemfile:

gem 'kraken_ruby'

And then execute:

$ bundle

Or install it yourself as:

$ gem install kraken_ruby


Create a Kraken client:

API_KEY = '3bH+M/nLp......'
API_SECRET = 'wQG+7Lr9b.....'

kraken =, API_SECRET)

time = kraken.server_time
time.unixtime #=> 1393056191

Public Data Methods

Server Time

This functionality is provided by Kraken to to aid in approximating the skew time between the server and client.

time = kraken.server_time

time.unixtime #=> 1393056191
time.rfc1123 #=> "Sat, 22 Feb 2014 08:28:04 GMT"

Asset Info

Returns the assets that can be traded on the exchange. This method can be passed info, aclass (asset class), and asset options. An example below is given for each:


Asset Pairs

pairs = kraken.asset_pairs

Ticker Information

ticker_data = kraken.ticker('XLTCXXDG, ZUSDXXVN')

Order Book

Get market depth information for given asset pairs

depth_data = kraken.order_book('LTCXRP')


Get recent trades

trades = kraken.trades('LTCXRP')


Get spread data for a given asset pair

spread = kraken.spread('LTCXRP')

Private Data Methods


Get account balance for each asset Note: Rates used for the floating valuation is the midpoint of the best bid and ask prices

balance = kraken.balance

Trade Balance

Get account trade balance

trade_balance = kraken.trade_balance

Open Orders

open_orders = kraken.open_orders

Closed Orders

closed_orders = kraken.closed_orders

Query Orders

See all orders

orders = kraken.query_orders

Trades History

Get array of all trades

trades = kraken.trade_history

Query Trades

Input: Comma delimited list of transaction (tx) ids

trades = kraken.query_trades(tx_ids)

Open Positions

Input: Comma delimited list of transaction (tx) ids

positions = kraken.open_positions(tx_ids)

Ledgers Info

ledgers = kraken.ledgers_info

Ledgers Info

Input: Comma delimited list of ledger ids

ledgers = kraken.query_ledgers(ledger_ids)

Trade Volume

Input: Comma delimited list of asset pairs

asset_pairs = 'XLTCXXDG, ZEURXXDG'
volume = kraken.query_ledgers(asset_pairs)

Adding and Cancelling Orders

Add Order

There are 4 required parameters for buying an order. The example below illustrates the most basic order. Please see the Kraken documentation for the parameters required for more advanced order types.

# buying 0.01 XBT (bitcoin) for XRP (ripple) at market price
opts = {
  pair: 'XBTXRP',
  type: 'buy',
  ordertype: 'market',
  volume: 0.01


Cancel Order



  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request


Ruby Gem for Kraken Exchange API




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