How to Use WebSocket

Update Notes

2026-08-03 Сlarified the frequently asked questions.
2024-06-28 Initial release.

Preparation

Before connecting to the WebSocket service:

Contact a CS2DT manager to enable WebSocket access for your account.

Call the Get WSS Address endpoint to obtain a WebSocket connection URL.

Use the returned URL to connect to the WebSocket service.

The WSS address is valid for 30 minutes. After it expires, obtain a new address before connecting. Once you already connected, existing connection will not expire.

Examples

Data

Description

Message Fields


Field	Description
`requestId`	A unique identifier for the WebSocket message.
`roomId`	The topic associated with the message.
`sendTime`	The time when the WebSocket message was sent.
`event`	The type of listing update. See the Event Types below.
`data`	The listing data associated with the event. See the Data Fields below.

Event Types


Value	Description
new	A new listing was added.
update	An existing listing was updated.
remove	A listing was removed.

Data Fields


Field	Description
`delivery`	Delivery method: 1 for manual delivery or 2 for automatic delivery.
`id`	The product ID of the listing.
`itemId`	The item ID.
`price`	The listing price.
`updateTime`	The time when the listing was last updated.
`marketHashName`	The item's Steam market hash name.
`classId`	The Steam class ID.
`instanceId`	The Steam instance ID.
`steamId`	The Steam ID associated with the listing.
`assetId`	The Steam asset ID.
`assetInfo`	Detailed information about the asset.

Update Notes#

Preparation#

Examples#

Data#

Description#

Message Fields#

Event Types#

Data Fields#