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I was wondering if anyone knew of a way to buy items off of the Steam Community Market through Java. I'm assuming that I will also need help authenticating the purchase with steam login information.

Benjamin Owen
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2 Answers2

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Here's what I got;

Item Price
https://steamcommunity.com/market/priceoverview/?appid=753&currency=21&market_hash_name=286570-ToroRosso%Card

Purchase
https://steamcommunity.com/market/createbuyorder/

POST;
sessionid: ****
currency: 21
appid: 753
market_hash_name: 286570-ToroRosso Card
price_total: 4
quantity: 1


Purchase listining
https://steamcommunity.com/market/buylisting/*listiningID* 

POST;
sessionid: ****
currency: 21
subtotal: 452
fee: 67
total: 519
quantity: 1
billing_state: ""
save_my_address: 0

So if you can get a session id and fill in the rest your sorted :p sorry it took 5 years xD

martiliones
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Charlie Simon
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There isn't an API the market, but some people are screen scraping the HTML or getting the JSON

Get the price of an item on Steam Community Market with PHP and Regex

Get steam item prices

You can do this in Java with a http client as well.

Community
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John Scattergood
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  • I've already gotten the price of the item, I just can't find a good source to find out how to buy the item automatically. Let's say I already have all the details, I just need to buy the item. – Benjamin Owen Dec 16 '15 at 01:30
  • What http client are you using? – John Scattergood Dec 16 '15 at 01:33
  • I'm not using an HTTP Client. I'm getting JSON from the Steam market, and getting the values I need. – Benjamin Owen Dec 16 '15 at 01:34
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    Since there isn't a published API, you have 2 choices 1. Use a robot http client to synthetically push the buttons by ID like selenium does or 2. make a purchase and watch the network calls to discover APIs... I'm not confident in 2 due to security – John Scattergood Dec 16 '15 at 01:40