AsyncAPI channel · Polymarket · Polymarket CLOB WebSocket API

/ws/market

Public market channel. Subscribe by sending a subscription message with a list of asset_ids (ERC-1155 token IDs for YES/NO outcomes). Streams order book snapshots, price changes, tick size changes, and last trade prices for those assets. No authentication required.

Open source AsyncAPI → All Polymarket channels Polymarket provider profile
Provider: Polymarket AsyncAPI: v2.6.0 Spec: Polymarket CLOB WebSocket API Operations: 2 Messages: 5

Channel address

/ws/market

Operations

publish
subscribeMarket
Subscribe to one or more assets on the market channel.
receiveMarketEvents
Receive market channel events for subscribed assets.

Messages

MarketSubscription
Subscribe to market channel updates for a list of asset IDs.
Content-Type:
Book
Full order book snapshot for an asset.
Content-Type:
PriceChange
One or more price level changes within a market. A size of "0" indicates the price level has been removed from the book.
Content-Type:
TickSizeChange
Tick size adjustment for an asset's order book.
Content-Type:
LastTradePrice
Most recent executed trade price for an asset.
Content-Type:

About AsyncAPI

The AsyncAPI specification describes event-driven APIs the way OpenAPI describes request/response APIs. A channel is the named pipe — a webhook URL, a Kafka topic, a WebSocket route, an MQTT subject — that producers and consumers publish or subscribe to. Each channel carries one or more messages with structured payloads, and an operation declares whether a given party sends or receives on that channel.

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