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WSS
wss://ws-subscriptions-clob.polymarket.com
/
ws
/
market
Messages
Subscription Request
type:object

Initial subscription message sent after connecting

Subscription Update
type:object

Subscribe or unsubscribe from assets without reconnecting

Ping
type:string

Client heartbeat — send every 10 seconds

Pong
type:string

Server heartbeat response

Orderbook Snapshot
type:object

Full aggregated orderbook for an asset

Price Change
type:object

Orderbook price level delta update

Last Trade Price
type:object

Trade execution event

Tick Size Change
type:object

Market tick size update event

Best Bid/Ask
type:object

Best bid and ask price update — requires custom_feature_enabled: true

New Market
type:object

New market creation event — requires custom_feature_enabled: true

Market Resolved
type:object

Market resolution event — requires custom_feature_enabled: true