AsyncAPI channel · Kusama · Kusama JSON-RPC Subscription API

chain_subscribeAllHeads

Emits headers for every block the node imports, including blocks not on the best chain. Use only when you need fork visibility. Unsubscribe with chain_unsubscribeAllHeads.

Open source AsyncAPI → All Kusama channels Kusama provider profile
Provider: Kusama AsyncAPI: v3.0.0 Spec: Kusama JSON-RPC Subscription API Operations: 1 Messages: 1

Channel address

chain_subscribeAllHeads

Operations

receive
receiveAllHeads
Receive every imported header including forks.

Messages

blockHeader
Block header
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 Agent Skill and MCP server surfaces of the same providers.