AsyncAPI channel · Helius · Helius WebSocket APIs

slotsUpdatesSubscribe

Subscribe to detailed slot status updates (firstShredReceived, completed, createdBank, frozen, dead, optimisticConfirmation, root). Marked unstable. Per Helius docs this is NOT supported on LaserStream WS, but is reachable on standard Helius mainnet/devnet WS endpoints.

Open source AsyncAPI → All Helius channels Helius provider profile
Provider: Helius AsyncAPI: v2.6.0 Spec: Helius WebSocket APIs Operations: 2 Messages: 4

Channel address

slotsUpdatesSubscribe

Operations

publish
slotsUpdatesSubscribe
Open a slotsUpdatesSubscribe subscription.
slotsUpdatesNotification
Slot update notifications.

Messages

slotsUpdatesSubscribe
slotsUpdatesSubscribe request
Content-Type: application/json
slotsUpdatesUnsubscribe
slotsUpdatesUnsubscribe request
Content-Type: application/json
jsonRpcResponse
Response to a subscribe / unsubscribe request — carries the subscription id (subscribe) or a boolean (unsubscribe).
Content-Type: application/json
slotsUpdatesNotification
slotsUpdatesNotification
Content-Type: application/json

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.

Browse every event-driven channel on the APIs.io network or compare with the broader Naftiko capability, Agent Skill, and MCP server surfaces of the same providers.