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Dashboard API Reference

The Dashboard API provides an interface for displaying real-time information and status updates directly on the user’s MentraOS glasses. It allows your app to send content to the dashboard.

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Import

import { AppServer, AppSession, DashboardMode } from '@mentra/sdk';

export class MyAppServer extends AppServer {
  protected async onSession(session: AppSession, sessionId: string, userId: string): Promise<void> {
    // Access the dashboard API
    const dashboard = session.dashboard;

    // Send content to the main dashboard
    dashboard.content.writeToMain('🔄 Processing...');
  }
}

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Overview

Every AppSession exposes a dashboard property that provides access to the Dashboard API:
PropertyTypePurpose
session.dashboard.contentDashboardContentAPIInterface for writing content to the dashboard
The SDK automatically converts your method calls into WebSocket messages that the MentraOS cloud routes to the user’s glasses. You never have to construct layouts manually—simply provide text content and the SDK renders it in the main dashboard.

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Enum: DashboardMode

The DashboardMode enum defines the different display modes available on the MentraOS dashboard. 
enum DashboardMode {
  MAIN = 'main'
}
Values:
  • MAIN: The default dashboard mode that appears as a small overlay
Use these values whenever a method accepts a mode parameter or when checking the current dashboard state.

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Class: DashboardContentAPI

The DashboardContentAPI class provides methods for sending content to the dashboard. It is automatically instantiated by the AppSession and available at session.dashboard.content.

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Constructor

The DashboardContentAPI is automatically instantiated by the AppSession. You should not create instances directly. 
class DashboardContentAPI {
  constructor(
    private wsConnection: WebSocketConnection,
    private packageName: string
  )
}

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Methods

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write

Send content to the dashboard. 
write(content: string): void
Parameters:
  • content: The text content to display on the dashboard
Returns: void Example: 
session.dashboard.content.write('✅ Task completed');

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writeToMain

Convenience method for sending content specifically to the main dashboard mode. 
writeToMain(content: string): void
Parameters:
  • content: The text content to display in main mode
Returns: void Example: 
// These are equivalent:
session.dashboard.content.writeToMain('🔄 Processing...');
session.dashboard.content.write('🔄 Processing...', [DashboardMode.MAIN]);

// Common use cases
session.dashboard.content.writeToMain('📧 3 new messages');
session.dashboard.content.writeToMain('🎵 Now playing: Song Title');
session.dashboard.content.writeToMain('⚠️ Low battery: 15%');

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Interface: DashboardAPI

The main dashboard interface that contains all dashboard-related functionality. 
interface DashboardAPI {
  content: DashboardContentAPI;
}
Every AppSession constructs this object and assigns it to session.dashboard. Currently, it only contains the content API, but future versions may include additional dashboard capabilities.

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Content Guidelines

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Character Limits

To ensure optimal display:
  • Keep content under 60 characters to avoid truncation
// Good length
session.dashboard.content.writeToMain('✅ Build complete');

// Too long
session.dashboard.content.writeToMain('✅ Build completed successfully with all tests passing and no errors found');

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Content Replacement

The dashboard keeps only the latest message per app. Writing a new message automatically replaces your previous one. 
// First message
session.dashboard.content.writeToMain('🔄 Starting...');

// This replaces the previous message
session.dashboard.content.writeToMain('✅ Complete!');

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Message Types (Advanced)

The SDK handles these WebSocket messages automatically, but they are documented here for completeness:
Messagetype valueSent ByPurpose
DashboardContentUpdatedashboard_content_updateAppSend new content to dashboard
DashboardModeChangedashboard_mode_changeMentraOSNotify of mode transitions
DashboardModeQuerydashboard_mode_queryAppRequest current mode
These correspond to TypeScript interfaces in @mentra/sdk/src/types/dashboard.

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Frequently Asked Questions

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Can I send layouts or images?

Not yet. The current release supports plain text only. Rich layouts, images, and interactive elements are planned for future releases.

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What happens if I write multiple times in a row?

The dashboard keeps only the latest message per app per mode. Each new message replaces the previous one for that specific mode. 
session.dashboard.content.writeToMain('First message');
session.dashboard.content.writeToMain('Second message'); // Replaces first message

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Is there a character limit?

Yes, to ensure optimal display:
  • 60 characters maximum
Content exceeding this limit may be truncated. This limit is subject to change in future releases.