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McKay Development

Automatically selling steam items, error 400

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As has also been the caseĀ earlier, I am trying to create an automatic steam market seller, however I get error 400 when trying to do so.

I have tried multiple ways, ending up trying to use httpRequestPost from the steamcommunity package

community.httpRequestPost('https://steamcommunity.com/market/sellitem/', {
		form: {
			sessionid: community.getSessionID(),
			appid: item.appid,
			contextid: item.contextid,
			assetid: item.assetid,
			amount: 1,
			price: item.price
		headers: {
			'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
			'User-Agent': 'Opera/9.80 (X11; Linux i686; Ubuntu/14.10) Presto/2.12.388 Version/12.16',
			'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8',
			'Connection': 'keep-alive',
			'Cookie': cookies,
			'Host': 'steamcommunity.com',
			'Accept-Encoding': 'gzip, deflate',
			'Accept-Language': 'en-US,en;q=0.5'
		json: true
		}, (err, response, json) => {
			if(err) {


		}, "steamcommunity");

This will return error 400, and I have no clue as to why that is, any suggestions?

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