MtGox/API

The MtGox API provides various methods to access different informations from the market, place orders, and more.

Two APIs are available at this point: the HTTP api (available by posting to mtgox.com/code/*) and the websocket API.

Legacy API

This API is available in https://mtgox.com/code/*, and provides various informations. It also supports making an order, a withdraw, a deposit, etc.

Authentication

Authentication is performed by posting a username and a password in variables "name" and "pass". Some methods do not require authentication.

Methods

data/getTrades.php

This allows retrieving all trades which happened in the last 24 hours. The returned data is cached and may not reflect latest activity.

Parameters:

• since: Passing a tid in "since" allows retrieving all trades since that trade. The passed id is may not exist. Ie. to get all trades from the very beginning one would just call https://mtgox.com/code/data/getTrades.php?since=0 . since returns only 100 trades, and you can call the method again by passing the latest trade you have imported in since.

Websocket API

See: http://forum.bitcoin.org/index.php?topic=5855.0 (will be ported here soon)

Connecting

You can connect via: ws://websocket.mtgox.com/mtgox

Channels

The websocket will subscribe you to some channels automatically:

Channel ID	Description
dbf1dee9-4f2e-4a08-8cb7-748919a71b21	trades (each time a trade happens, you get something here)
d5f06780-30a8-4a48-a2f8-7ed181b4a13f	the mtgox ticker (lots of updates, with often the same data)
24e67e0d-1cad-4cc0-9e7a-f8523ef460fe	depth information in realtime (price + amount + type... type=1=Ask, type=2=Bid)

Additionally each user has a "own" channel which streams informations about orders (new order, deleted order, etc) and trades only the user's trades).

Each message is a JSON-encoded object, with at least "op" element. The "op" element contains the operation to be done (for outgoing messages), or the type of message (for incoming messages).

Possible outgoing commands

unsubscribe Stop receiving messages from a channel (parameter "channel")

Incoming Data

Ticker

{"channel":"d5f06780-30a8-4a48-a2f8-7ed181b4a13f","op":"private","origin":"broadcast","private":"ticker","ticker":"buy":0.9515,"high":1,"low":0.91,"sell":0.9697,"vol":34349}}

Trade

{"channel":"dbf1dee9-4f2e-4a08-8cb7-748919a71b21","op":"private","origin":"broadcast","private":"trade","trade":"amount":2.71,"amount_int":"271000000","date":1310279340,"item":"BTC","price":14.43,"price_currency":"USD","price_int":"1443000","tid":"1310279340877902","trade_type":"bid","type":"trade"}}

Name	Value
amount	the traded amount in item (BTC), float, deprecated
amount_int	the traded amount * 10000
date	unix timestamp of trade
item	What was this trade about
price	price per unit, float, deprecated
price_int	price in smallest unit as integer (5 decimals of USD, 3 in case of JPY)
price_currency	currency in which trade was completed
tid	Trade id (big integer, which is in fact trade timestamp in microseconds)
trade_type	Did this trade result from the execution of a bid or a ask?