Building
Start with the platform model, choose the backend your game needs, then build on a development instance.
JavaScript SDK version 2
Recommended for new builds and usable in development now, with general availability expected in October 2026. Check the release notes and confirm your baseline with us before you start.
From an empty repository to a live app
- 1
Learn the model
Spaces, Apps, Projects, Events and Elements (ready-made interactions such as polls and trivia).
- 2
Define the App Spec (the JSON that defines your app)
Choose settings, event configuration and fields.
- 3
Build with the SDK
Use live updates, server time, localisation and analytics.
- 4
Test the experience
Check the app, its embed and the customer's integrations.
Developer guideDocumentation for AI tools
Choose a backend
| Route | Use it when | Approval |
|---|---|---|
| Interaction Cloud Elements | Trivia, predictions, polls or votes map to existing Elements. Build a front end with the Interaction SDK. | Standard SDK access |
| Gamestage (our server-side game engine) | You need answers, scoring, attempts, locks or settlement held on the server. Build a front end on a Gamestage engine. | Gamestage account approval |
| Your own backend | An existing backend has to stay. Supply load tests, a recent penetration test and hosting details. | Case-by-case review |
Gamestage does not sign players in. Bring an OIDC provider if your game needs named players, and check with us before building your own game logic.
Instances
Europe is the default; the customer chooses. Register and configure your app on both if needed.
| Instance | Studio | Experience host |
|---|---|---|
| Europe | studio.monterosa.cloud | cdn.monterosa.cloud |
| USA | studio-us.monterosa.cloud | cdn-us.monterosa.cloud |
| Development or Playground | Issued with access | Issued with access |
Accounts, Spaces, Apps, Projects and fan identifiers are separate per instance. No real fan data in development, and no test content in production.
AI tools
- Keep platform rules in an AGENTS.md or CLAUDE.md file.
- Give your tools the Monterosa documentation index, or install Gamestage AI.
- Work from a specification and scan throughout development.
- Have a person review generated code before it ships.
- Never send personal data to AI services.
Command-line tool
Script the work you would otherwise do in Studio. Every command also runs as an MCP tool for AI agents, and profiles limit what they may change.
The command-line tool, Building Apps and Gamestage are in beta. Confirm interfaces and access with us.
