September brought major expansions to Replit's integration ecosystem and AI capabilities, including desktop MCP client support, custom API connectors for agents, and new model choices for building applications.
Integration and Connectivity
- Desktop MCP client support: Replit now works directly inside compatible desktop MCP clients, letting you create, explore, update, and publish apps without leaving your AI tool.
- Custom API connectors for Agent: Pro and Enterprise users can now link external services in beta by defining endpoints, authentication, and usage instructions to build with services their team already uses.
- Airwallex payment integration via MCP: Connect Agent to Airwallex to build and test payment integrations safely in the sandbox environment.
App Development and Building
- Meta device app builder: Describe your app idea and Replit generates device-specific instructions with QR-code previews for on-device testing on Meta devices.
- Muse app generation: Muse can now create Replit apps directly from conversation, turning ideas into working applications without manual setup.
- Inline data visualization: Visualize data with inline charts in your Replit conversation powered by Atta, letting you explore findings without switching tools.
Models and Databases
- Multiple model selection for Agent: Choose GPT-6 Sol, GPT-6 Luna Fast, or Claude Opus 5.5 when building with Agent, subject to your tier and workspace policies.
- Lakebase managed PostgreSQL: Databricks Apps now include Lakebase managed PostgreSQL, which Replit provisions and automatically applies schema changes for seamless publishing.