> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mcp-use.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Notifications

> Handle real-time updates from MCP servers

MCP notifications are one-way JSON-RPC messages (no response).

## Receive (server → client)

Global handler on the client:

```typescript theme={null}
import { MCPClient } from "@mcp-use/client";

const client = new MCPClient(
  { mcpServers: { demo: { url: "http://localhost:3000/mcp" } } },
  {
    onNotification: async (notification) => {
      console.log(notification.method, notification.params);
    },
  },
);
```

Or per-connection:

```typescript theme={null}
const conn = await client.connect("demo");

conn.on("notification", async (notification) => {
  if (notification.method === "notifications/tools/list_changed") {
    await conn.listTools();
  }
});
```

Common methods: `notifications/tools/list_changed`, `notifications/resources/list_changed`, `notifications/prompts/list_changed`.

## Send (client → server)

Update roots — the client sends `notifications/roots/list_changed`:

```typescript theme={null}
await conn.setRoots([
  { uri: "file:///home/user/project", name: "Project" },
]);
```

Pass initial roots in server config or connector options.

## React

`McpClientProvider` stores notifications on each server (`notifications`, `unreadNotificationCount`). Use `onNotificationReceived` per server for custom handling.

## Reference

Server-side: [Notifications](/typescript/server/notifications)