At SUGCON Europe 2025 in Antwerp, Belgium, Sitecore officially unveiled the Sitecore Marketplace SDK—a powerful developer toolkit that enables integration between client apps and Sitecore’s composable Intelligent DXP ecosystem. This announcement represents a major milestone in Sitecore’s commitment to openness and extensibility and is a significant leap forward for developers, opening the doors to deep integration, secure communication, and the creation of apps that plug directly into Sitecore experiences.
Whether you’re looking to extend XM Cloud with tools, embed integrations with third-party services, or publish full-featured solutions to the Sitecore Marketplace, the SDK gives you the infrastructure to do it securely, scalable, and predictable.
Why this matters?
Previously, creating tools for the Sitecore ecosystem required heavy workarounds, custom integrations, or platform-specific hacks. The Sitecore Marketplace SDK changes that by, at its core, enabling secure, type-safe communication between iframe-based applications and Sitecore host environments like XM Cloud. It abstracts the low-level complexity of browser messaging and provides a modern, modular developer experience built with TypeScript, React-friendly patterns, and a clear separation of responsibilities.
By providing developers with a robust communication framework, intuitive APIs, and first-class support for XM Cloud, the SDK opens the door to a new generation of apps that are:
- Composable: Easily pluggable into the Sitecore UI
- Secure: Built on handshake validation and origin checks
- Developer-friendly: Modern APIs inspired by tools like React Query and Apollo
- Marketplace-ready: Structured for reuse, distribution, and publishing
This isn’t just about integration—it’s about creating meaningful experiences that enhance the Sitecore platform.
From content synchronization tools to analytics dashboards or data migration utilities—developers can now focus on functionality instead of fighting infrastructure.
In the next post I’ll explore how the SDK works under the hood, go through it’s architecture. Then I’ll go through the technologies used and how to use it effectively, and in the end hopefully I’ll show you how to build a basic client app with the Sitecore Marketplace SDK (although atm I’m waiting on access).
You can find the Sitecore Marketplace SDK here:
Happy Sitecore-ing!
–Robbert
