#calculators

24 free personal-finance + macro tools (mortgage, paycheck, tax, FRED, BLS) for LLM agents. Zero API keys, stdio transport.

Six deterministic hydration calculators for LLMs: water intake, dehydration, pregnancy, CKD, athlete, energy schedules.

17 free freight tools for AI agents — LDM/CBM/chargeable weight calculators, consignment calculator, pallet fitting, container capacity, ULD reference, vehicle types, ADR dangerous goods (2,939 entries), ADR exemption & LQ/EQ, HS codes (6,940), UK duty/VAT (live GOV.UK), INCOTERMS 2020, airlines (6,352), UN/LOCODE (116,129), unit converter, shipment summary. Free REST APIs + MCP server.

300+ calculators for AI agents via the Model Context Protocol. MCPCalc is a hosted MCP server that gives AI agents (Claude, ChatGPT, and others) access to a comprehensive library of calculators spanning finance, math, health, construction, engineering, food, automotive, and more — including a full Computer Algebra System (CAS) and a grid-based Spreadsheet calculator.