WebSocket

Subscribe to real-time Solana account updates, program events, and slot notifications over WebSocket.

Solami’s WebSocket endpoint lets you subscribe to real-time Solana updates using the standard Solana WebSocket API. Connect once and receive push notifications for account changes, program events, signature confirmations, and more.

WebSocket is available on the Dev plan and above.

Endpoint

wss://rpc.solami.fast/ws/sol?api_key=YOUR_API_KEY

Connection limits

Plan	Concurrent WebSocket connections
Free	0
Dev	2
Pro	5
Ultra	10
Shared Metal	30

Subscription methods

All standard Solana WebSocket subscription methods are supported.

Method	What it does
accountSubscribe	Receive updates when an account’s data changes
programSubscribe	Watch all accounts owned by a program
signatureSubscribe	Get notified when a transaction is confirmed
logsSubscribe	Stream transaction logs matching a filter
slotSubscribe	Receive slot progression updates
rootSubscribe	Get notified when a new root is set

Each subscribe method has a corresponding unsubscribe method (e.g., accountUnsubscribe).

Usage example

This example subscribes to account changes using the native WebSocket API:

const ws = new WebSocket(
  "wss://rpc.solami.fast/ws/sol?api_key=YOUR_API_KEY"
);

ws.onopen = () => {
  ws.send(
    JSON.stringify({
      jsonrpc: "2.0",
      id: 1,
      method: "accountSubscribe",
      params: [
        "ACCOUNT_ADDRESS",
        { encoding: "jsonParsed", commitment: "confirmed" },
      ],
    })
  );
};

ws.onmessage = (event) => {
  const data = JSON.parse(event.data);
  if (data.method === "accountNotification") {
    console.log("Account changed:", data.params.result);
  }
};

Replace ACCOUNT_ADDRESS with the base-58 public key of the account you want to watch.

WebSocket connections can drop during network events. In production, implement reconnection logic to avoid missing updates.

WebSocket vs gRPC

Both WebSocket and gRPC deliver real-time data, but they suit different use cases.

	WebSocket	gRPC
Protocol	Standard WebSocket (JSON)	Yellowstone gRPC (Protobuf)
Plans	Dev and above	Pro and above
Best for	Browser apps, simple integrations	High-throughput backends, MEV bots
Filtering	Basic (by account or program)	Advanced (by program, account, instruction)
Throughput	Moderate	Very high

Use WebSocket when you need browser support or a simple integration. Use gRPC when you need high throughput, advanced filtering, or minimal parsing overhead.

Next steps

Streaming data guide

Step-by-step guide for setting up WebSocket and gRPC subscriptions.

gRPC streams

Higher-throughput streaming for production backends.

Plans

See connection limits across all plans.