slotUnsubscribe

The slotUnsubscribe method cancels a slot subscription created by slotSubscribe, stopping further slot processing notifications.

📘 Usage Notes

• This method must be called via a WebSocket endpoint. HTTP is not supported.
• Once unsubscribed, the subscription ID cannot be reused. Call slotSubscribe again to create a new subscription.
• If the WebSocket connection is dropped, subscriptions are automatically cancelled. Re-subscribe after reconnecting.

---

1. Request

Parameters

The slot unsubscribe request accepts the following parameters.

Parameter	Type	Required	Description
id	integer or string	required	A unique identifier for the request, used by the client to match requests with responses.
jsonrpc	string	required	The JSON-RPC protocol version. Always set to "2.0".
method	string	required	The name of the method to invoke. Set to "slotUnsubscribe".
params	array	required	An array containing the subscription ID to cancel.

Example

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "slotUnsubscribe",
  "params": [0]
}

---

2. Response

Success Response

Returns true when the subscription is successfully cancelled.

{
  "jsonrpc": "2.0",
  "result": true,
  "id": 1
}

Error Response

Returns an error if the unsubscribe request fails.

{
  "jsonrpc": "2.0",
  "error": {
    "code": -32000,
    "message": "Invalid subscription ID"
  },
  "id": 1
}

---

3. How to Use

Connect to WebSocket Channel

wscat -c wss://api.mainnet-beta.solana.com

Subscribe to Slots (First)

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "slotSubscribe",
  "params": []
}

Receive Subscription ID

{
  "jsonrpc": "2.0",
  "result": 0,
  "id": 1
}

Unsubscribe

There are two ways to cancel a subscription:

1. Close the connection: Press CTRL+C in the terminal to close the WebSocket connection. All active subscriptions are automatically cancelled.

2. Cancel a specific subscription: Use slotUnsubscribe to cancel a specific subscription while keeping the connection open.

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "slotUnsubscribe",
  "params": [0]
}

Confirm Unsubscribe

{
  "jsonrpc": "2.0",
  "result": true,
  "id": 2
}