Contaí — Calculadoras Fiscais Brasileiras

Exposes 32 Brazilian tax and labor calculation tools directly to Claude, covering CLT employment termination, INSS contributions, IRRF withholding, corporate entity structures, personal finance scenarios, and health metrics. Built on the Contaí calculator engine that powers their web platform with 134+ calculators updated for 2026. You'd reach for this when modeling Brazilian payroll teardowns, severance packages, net salary after deductions, or comparing financing scenarios without leaving your conversation. The same REST API they offer developers is now callable through MCP stdio transport, so Claude can run rescisão CLT calculations, compound interest projections, or IMC diagnostics on demand. Saves you from toggling between a Brazilian tax calculator site and your work.