WebService::MtGox - a Perl interface to MtGox's BitCoin trading API

What is BitCoin?

Bitcoin is a peer-to-peer currency. Peer-to-peer means that no central authority issues new money or tracks transactions. These tasks are managed collectively by the network. I have a feeling that this might be a real game changer, and it will be very interesting to see how governments and banks react to this new liberatory technology.

What is MtGox?

https://mtgox.com/ is currently (as of June 2011) the most heavily traded BitCoin market. They have been kind enough to provide an API that lets you automate your trading.

Some Sample Code

Using MtGox's Trading API via Perl.

use common::sense;
use WebService::MtGox;

my $m = WebService::MtGox->new(user => 'me', password => 's3cr3t');
my $depth = $m->depth;
my $buy   = $m->buy(amount => 10, price => 30.9999);
my $sell  = $m->sell(amount => 10, price => 34.54321);

The Command Line Client

This module comes with a command line client called *mg* that lets you get market data and initiate trades. If you're a command line junky, you'll find it quite convenient.

Usage:
      mg <COMMAND> [OPTION]...

Options:
    ticker
      Get ticker.

    depth
      Get trading depth.

    trades
      Get recent trades.

    balance
      Get your balance.

    buy
      Buy some bitcoins.

      --amount=NUMBER
      --price=NUMBER

    sell
      Sell some bitcoins.

      --amount=NUMBER
      --price=NUMBER

    ls
    list
      List your orders.

    cancel
      Cancel an order.

      --oid=ID
          The order id.

      --type=NUMBER
          The type may be 1 for buy or 2 for sell.

    send
      Send bitcoins from your MtGox account to a bitcoin address.

      --amount=NUMBER
      --address=BITCOIN_ADDRESS

    usd [BITCOINS]
      Display the total value of your balance in US Dollars. You can also
      use this to find the value of an arbitrary amount of bitcoins in US
      Dollars.

        # How much is 1000 btc worth in US Dollars?
        mg usd 1000

    btc [USD]
      Display the total value of your balance in bitcoins. You can also use
      this to find the value of an arbitrary amount of US Dollars in
      bitcoins.

        # How much is $400 worth in bitcoins?
        mg btc 400