AsyncAPI channel · zkSync · zkSync Era WebSocket JSON-RPC PubSub API

`/`

Single bidirectional WebSocket channel carrying JSON-RPC 2.0 request, response, and notification messages. Clients send `eth_subscribe` requests to open a subscription, then receive `eth_subscription` notifications until they call `eth_unsubscribe`.

Open source AsyncAPI → All zkSync channels zkSync provider profile

Provider: zkSync AsyncAPI: v2.6.0 Spec: zkSync Era WebSocket JSON-RPC PubSub API Operations: 2 Messages: 8

Channel address

/

Operations

publish

sendJsonRpcRequest

Send a JSON-RPC 2.0 request from the client to the zkSync Era node.

receiveJsonRpcMessage

Receive JSON-RPC 2.0 responses and subscription notifications.

Messages

eth_subscribe

Open a new subscription. First parameter is the subscription type name (`newHeads`, `logs`, or `newPendingTransactions`). For `logs` an optional filter object may be supplied as the second parameter.

Content-Type: application/json

eth_unsubscribe

Cancel an existing subscription by ID.

Content-Type: application/json

eth_subscribe_response

JSON-RPC response returning a subscription ID for an eth_subscribe call.

Content-Type: application/json

eth_unsubscribe_response

JSON-RPC response confirming a subscription was cancelled.

Content-Type: application/json

newHeads

Notification delivered when a new block header is produced on zkSync Era.

Content-Type: application/json

logs

Notification delivered when a new log entry matches the filter.

Content-Type: application/json

newPendingTransactions

Notification with the transaction hash of a new pending transaction.

Content-Type: application/json

jsonrpc_error

Error response envelope.

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.