AI-powered estimation via MCP
Open Calc Studio is fully accessible via the Model Context Protocol (MCP). This means AI assistants like Claude can directly create budgets, add items, recalculate and export — without manual input.
- Create and manage budgets from Claude Code or other AI tools
- Automatically extract quantities from IFC/IFCX models
- Look up reference projects for realistic unit prices
- Export to PDF and IFCX directly from the AI workflow
- Extensible via the extension catalog
Why Open Calc Studio?
Cost estimates and budgets are essential for every construction project. Existing estimation software costs thousands of euros per license and locks you into proprietary formats. Open Calc Studio offers a fully open-source alternative that is just as powerful.
With direct connections to STABU/RAW standards, IFCX models for automatic quantities, and AI integration via MCP, Open Calc Studio is built for the future of AEC cost estimation.
Features
STABU/RAW integration
Full support for STABU and RAW standards for standardized specifications and cost estimates according to Dutch norms.
IFCX quantities
Automatically extract quantities from IFCX models. Link budget items directly to model elements for accurate calculations.
MCP Server
Fully accessible via Model Context Protocol. AI assistants can create, edit and export budgets.
Extension system
Extensible via an extension catalog. Add industry-specific calculation methods, templates and integrations.
Chapters & sections
Organize budgets into chapters, sections and budget items. Flexible hierarchy with automatic numbering.
Reference projects
Look up unit prices from reference projects. Build a reusable database of prices and key figures.
PDF & IFCX export
Export budgets as professional PDF reports or as IFCX data for exchange with other tools in the ecosystem.
Overhead costs
Configurable overhead costs: general site costs, profit & risk, CAR insurance and other surcharges automatically calculated.
Recalculation
One-click recalculation of the entire budget. All subtotals, VAT and overhead costs are automatically updated.
Technology
Built with TypeScript and Rust via Tauri 2. Runs as a desktop application on Windows, macOS and Linux, and as a web application in the browser. Includes MCP Server for AI integration and extension system for customization.