CalculatorLib

com.calculatorlib/calculatorsVersion 1.2.0

Year-correct, cited payroll and tax numbers for Asia (Vietnam first) plus ~8,000 calculators.

Status

Responds171 msNov 14, 2026, 13:50 UTCAnswered our handshake without sign-in.

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Last checked: Nov 14, 2026, 13:50 UTC
Latency: 171 ms
Remotes responding: 1 of 1
Sign-in: No sign-in
Hosting: Hosted outside the EU (detected)
Registry data as of: Nov 14, 2026, 22:14 UTC

Data from the official MCP Registry, checked by run.zero. How we check

Connect

Streamable HTTP

https://calculatorlib.com/mcpResponds171 msNov 14, 2026, 13:50 UTC

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Claude Code

claude mcp add --transport http calculators https://calculatorlib.com/mcp

Claude Desktop and claude.ai

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Settings > Connectors > Add custom connector
Name: calculators
Remote MCP server URL: https://calculatorlib.com/mcp

Cursor

{
  "mcpServers": {
    "calculators": {
      "url": "https://calculatorlib.com/mcp"
    }
  }
}

VS Code

code --add-mcp '{"name":"calculators","type":"http","url":"https://calculatorlib.com/mcp"}'

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Tools

5 tools

Tools of CalculatorLib
	Description		Read-only	Idempotent	Open world
`convert_units`Convert a value between units of one category (length, mass, temperature, area, volume, speed, data and 60 more). Names, symbols and common spellings work ("m", "ft", "lbs", "°C"). category is optional when the two units identify it; an unknown unit returns the category's unit list. Example: {"value":10,"from":"Meter","to":"Foot"}.	Convert a value between units of one category (length, mass, temperature, area, volume, speed, data and 60 more). Names, symbols and common spellings work ("m", "ft", "lbs", "°C"). category is optional when the two units identify it; an unknown unit returns the category's unit list. Example: {"value":10,"from":"Meter","to":"Foot"}.	No	Yes	Yes	No
`get_calculator_schema`Full input schema (field names, types, units, options) of one calculator. Optional: search_calculators already returns a compact schema per hit.	Full input schema (field names, types, units, options) of one calculator. Optional: search_calculators already returns a compact schema per hit.	No	Yes	Yes	No
`run_calculator`Run a calculator and get the result. Pass the calculator's name (from search_calculators) and its input fields in args. Returns the computed values plus a share link to the calculator page with inputs pre-filled; calculators backed by a legal edition also return edition, effective_from and sources[] (document, article/clause, URL) to cite. Missing inputs are refused (isError), never defaulted. When the calculator has a formula, the result ALSO includes formula_latex — the formula with the user's values substituted; show it to the user (rendered as LaTeX when your client supports it, otherwise inline as text). Example: {"name":"bmi_calculator","args":{"unitSystem":"metric","weight":70,"height":175}}.	Run a calculator and get the result. Pass the calculator's name (from search_calculators) and its input fields in args. Returns the computed values plus a share link to the calculator page with inputs pre-filled; calculators backed by a legal edition also return edition, effective_from and sources[] (document, article/clause, URL) to cite. Missing inputs are refused (isError), never defaulted. When the calculator has a formula, the result ALSO includes formula_latex — the formula with the user's values substituted; show it to the user (rendered as LaTeX when your client supports it, otherwise inline as text). Example: {"name":"bmi_calculator","args":{"unitSystem":"metric","weight":70,"height":175}}.	No	Yes	Yes	No
`search_calculators`Search CalculatorLib by keyword in any of its 12 languages — payroll, tax and social-insurance calculators for Asian markets (year-correct, legal editions cited where available) and about 8,000 general calculators. Returns the best matches (name, title, and a ready-to-use input schema) ranked by relevance and popularity. Call this FIRST, then call run_calculator with the chosen name. Example queries: "Vietnam personal income tax", "lương gross sang net", "mortgage monthly payment", "body mass index".	Search CalculatorLib by keyword in any of its 12 languages — payroll, tax and social-insurance calculators for Asian markets (year-correct, legal editions cited where available) and about 8,000 general calculators. Returns the best matches (name, title, and a ready-to-use input schema) ranked by relevance and popularity. Call this FIRST, then call run_calculator with the chosen name. Example queries: "Vietnam personal income tax", "lương gross sang net", "mortgage monthly payment", "body mass index".	No	Yes	Yes	No
`solve_math`Solve algebra, trigonometry or calculus step by step (equations, systems, derivatives, integrals, limits, simplify/factor). Answers are checked numerically; unverifiable problems are refused. Returns LaTeX + plain answer, steps, checks, page link.	Solve algebra, trigonometry or calculus step by step (equations, systems, derivatives, integrals, limits, simplify/factor). Answers are checked numerically; unverifiable problems are refused. Returns LaTeX + plain answer, steps, checks, page link.	No	Yes	Yes	No

Details

Registry status: Active
Published: Nov 9, 2026
Updated: Nov 9, 2026
Website: https://calculatorlib.com/mcp/docs⁠ (opens in a new tab)
Repository: Not given
Categories (suggested): Invoicing and accountingSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared

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