MCPcalc
What is this?
MCPCalc is a remote MCP server. There is nothing to install — AI agents connect directly to the hosted endpoint. This repository contains the registry metadata and documentation for the server.
Connecting
Claude.ai
MCPCalc is available as a connector in Claude.ai. Search for "MCPCalc" in the MCP integrations menu.
Claude Desktop / Cursor / Other MCP Clients
Add the following to your MCP client configuration:
{
"mcpServers": {
"mcpcalc": {
"url": "https://mcpcalc.com/api/v1/mcp"
}
}
}
No API key or authentication is required.
Agent usage guide: mcpcalc.com/api/v1/mcp/guide — includes examples and strict mode guidance.
Available Tools
MCPCalc exposes the following tools to connected AI agents:
list_calculators
List all available calculators, optionally filtered by category.
Parameters:
category(optional) — Filter by category:finance,math,health,construction,engineering,food,automotive,home,business,education,environment,pets,games,travel,date
get_calculator_schema
Get the input schema for a specific calculator.
Parameters:
calculator(required) — Calculator slug (e.g.,mortgage_payment,bmi,cas)
calculate
Run a calculation and get results.
Parameters:
calculator(required) — Calculator sluginputs(required) — Calculator input values as key-value pairsstrict(optional) — If true, reject invalid or unknown input fields
generate_prefilled_url
Generate a prefilled URL for a calculator without running the calculation. Useful for sharing.
Parameters:
calculator(required) — Calculator sluginputs(required) — Input values for URL prefill
create_session
Create a new interactive session for any calculator. Returns a shareable session URL.
Parameters:
calculator(required) — Calculator slugmetadata(optional) — Session metadata
get_session_state
Retrieve current field values, computation transcript, and pending messages for an active session.
Parameters:
session_id(required) — Session UUID
push_session_action
Push actions into a session's message queue — set fields, submit computations, trigger plots, and more.
Parameters:
session_id(required) — Session UUIDactions(required) — Array of action objects. Action types include:submit_expression— Evaluate a math expression (CAS)set_fields— Set form calculator field valuesplot— Plot a functionassign_variable— Set a variableinsert_markdown— Insert commentaryclear_transcript— Clear historyset_mode— Switch betweensymbolicandnumericmodesset_cells— Set cell values by A1 references (Spreadsheet)get_cells— Read cell values from A1 ranges (Spreadsheet)clear_cells— Clear cell values in A1 ranges (Spreadsheet)load_csv— Load CSV/TSV data into the grid (Spreadsheet)export_csv— Export a range as CSV (Spreadsheet)set_column_format— Set display formats by column letter (Spreadsheet)
close_session
Close a session and optionally persist a snapshot of its final state.
Parameters:
session_id(required) — Session UUID
Calculator Categories
| Category | Count | Examples |
|---|---|---|
| Finance | 55+ | Mortgage, compound interest, 401(k), tax estimators, NPV, IRR, FIRE |
| Math | 60+ | Fractions, statistics, geometry, physics, chemistry, CAS, Spreadsheet |
| Health | 25+ | BMI, BMR, TDEE, macros, pace calculator, heart rate zones |
| Construction | 35+ | Concrete, lumber, drywall, electrical, plumbing, HVAC |
| Home & Garden | 20+ | Lawn, mulch, paint, lighting, solar savings |
| Food & Drink | 25+ | Recipe scaler, sourdough, cocktail scaler, macro calculator |
| Engineering | 12 | Gear ratio, torque, Reynolds number, stress/strain |
| Automotive | 13 | Fuel economy, EV range, horsepower, lease vs buy |
| Business | 12 | Freelance rate, SaaS metrics, A/B test, ROAS |
| Education | 9 | GPA, grade needed, college cost |
| Environment | 9 | Carbon footprint, solar ROI, water footprint |
| Date & Time | 12 | Date difference, work days, Unix timestamp |
| Travel | 11 | Tip calculator, currency converter, travel budget |
| Pets | 7 | Dog/cat food, pet age, aquarium size |
| Games & Hobbies | 11 | D&D dice, card odds, photography exposure |
The CAS (Computer Algebra System)
The cas calculator is a general-purpose computational math environment supporting:
- Symbolic algebra — simplify, expand, factor expressions
- Calculus — derivatives, integrals, limits, series
- Equation solving — symbolic and numeric
- Interactive plotting — function graphs with configurable ranges
- LaTeX input — natural mathematical notation
- Variable assignment — build up computations step by step
- Symbolic and numeric modes — switch between exact and approximate results
CAS Example via MCP
1. create_session(calculator: "cas")
2. push_session_action(session_id: "...", actions: [
{ type: "submit_expression", expression: "diff(x^3 * sin(x), x)" },
{ type: "plot", expression: "x^3 * sin(x)", range: [-10, 10] }
])
3. get_session_state(session_id: "...") → view results
The Spreadsheet Calculator
The spreadsheet calculator is a grid-based computational environment (A–Z columns, 100 rows) supporting:
- Cell formulas — standard spreadsheet expressions with cell references
- Range operations — read, write, and clear cells by A1 notation
- CSV import/export — load and export tabular data programmatically
- Column formatting — set display formats per column
- Session-based — full state accessible via
get_session_state
Spreadsheet Example via MCP
1. create_session(calculator: "spreadsheet")
2. push_session_action(session_id: "...", actions: [
{ type: "set_cells", cells: { "A1": "Item", "B1": "Price", "A2": "Widget", "B2": 9.99, "A3": "Gadget", "B3": 24.50 } },
{ type: "set_cells", cells: { "A4": "Total", "B4": "=SUM(B2:B3)" } }
])
3. get_session_state(session_id: "...") → read computed values
4. push_session_action(session_id: "...", actions: [
{ type: "export_csv", range: "A1:B4" }
])
Architecture
MCPCalc is a fully hosted service. AI agents connect via the Streamable HTTP transport at https://mcpcalc.com/api/v1/mcp. No local installation, API keys, or environment variables are required.
AI Agent (Claude, ChatGPT, Cursor, Ollama, LM Studio, etc.)
│
│ MCP over Streamable HTTP
▼
MCPCalc Server (https://mcpcalc.com/api/v1/mcp)
│
├── 300+ Form Calculators
├── CAS Engine (symbolic + numeric)
└── Spreadsheet Engine (formulas, CSV, ranges)
Links
- Website: mcpcalc.com
Server Config
{
"mcpServers": {
"mcpcalc": {
"url": "https://mcpcalc.com/api/v1/mcp"
}
}
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