com.nanocalcs/calculators

What it mainly works on, as our AI model read its tool descriptions: nothing outside itself: it only answers questions.

None of its 24 tools are described as changing anything. For 1 the reading was uncertain, so no mark is shown.

• find_toolon 14 other serversreads or searches

  “Search the 431 free calculators and converters on nanocalcs.com by keyword (any language).”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  3 inputs, 1 required

  • querystringrequired“What the user needs, e.g.”
  • localestring“Page language for links, e.g.”
  • limitinteger“Max results, default 5”
• build_link

  “Build a nanocalcs.com URL for a tool id with inputs pre-filled via query parameters.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  3 inputs, 1 required

  • idstringrequired“Tool id from find_tool, e.g.”
  • paramsobject“Parameter name -> value”
  • localestring“Page language for links, e.g.”
• percentageon 4 other serverscalculates or converts

  “Exact percentage math.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  4 inputs, 3 required

  • modestringrequired
  • anumberrequired
  • bnumberrequired
  • localestring“Page language for links, e.g.”
• loan_paymenton 4 other serverscalculates or converts

  “Monthly loan repayment, total interest and total paid.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  6 inputs, 3 required

  • amountnumberrequired
  • ratenumberrequired“Annual interest rate %”
  • termnumberrequired
  • unitstring“Default years”
  • typestring
  • localestring“Page language for links, e.g.”
• date_addon 4 other serverscalculates or converts

  “Add or subtract years, months, weeks and days from a date (month-end clamped: Jan 31 + 1 month = Feb 28/29).”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  7 inputs, 1 required

  • startstringrequired“Start date (YYYY-MM-DD)”
  • opstring
  • yearsinteger
  • monthsinteger
  • weeksinteger
  • daysinteger
  • localestring“Page language for links, e.g.”
• days_betweenon 2 other serverscalculates or converts

  “Number of days, weeks, and years/months/days between two dates.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  4 inputs, 2 required

  • fromstringrequired“First date (YYYY-MM-DD)”
  • tostringrequired“Second date (YYYY-MM-DD)”
  • inclusiveboolean
  • localestring“Page language for links, e.g.”
• agecalculates or converts

  “Exact age in years, months and days, total days, and the next birthday.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  3 inputs, 1 required

  • birthstringrequired“Date of birth (YYYY-MM-DD)”
  • onstring“Age on this date (YYYY-MM-DD)”
  • localestring“Page language for links, e.g.”
• unit_converton 15 other serverscalculates or converts

  “Convert units with exact definitional factors.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  5 inputs, 4 required

  • categorystringrequired
  • valuenumberrequired
  • fromstringrequired
  • tostringrequired
  • localestring“Page language for links, e.g.”
• bmion 1 other servercalculates or converts

  “Body mass index with WHO adult category and the healthy weight range for the height (metric).”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  4 inputs, 2 required

  • height_cmnumberrequired
  • weight_kgnumberrequired
  • agenumber“Years, default 30.”
  • localestring“Page language for links, e.g.”
• roion 3 other serverscalculates or converts

  “Total ROI %, profit, multiple, and annualized (compound) return when a period is given.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  5 inputs, 2 required

  • initialnumberrequired
  • finalnumberrequired
  • periodnumber
  • unitstring
  • localestring“Page language for links, e.g.”
• token_counton 2 other serverscalculates or converts

  “Exact token count with OpenAI tiktoken encodings (o200k_base default, cl100k_base), plus Claude and Gemini estimates.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  3 inputs, 1 required

  • textstringrequired
  • encodingstring
  • localestring“Page language for links, e.g.”
• context_window_fitcalculates or converts

  “Whether a prompt fits each model's context window, with remaining tokens after an output reserve.”

  Publisher declares: read-only yes · destructive no · idempotent yes · open-world no

  5 inputs

  • tokensinteger
  • textstring
  • reserveinteger
  • modelstring
  • localestring“Page language for links, e.g.”

Each quoted sentence is the first sentence of the publisher’s own description. The kind of tool and the “changes data” mark are our AI model’s reading of that description, not something we tested: two differently worded runs had to agree, otherwise no label is shown, and nobody has checked them by hand. A tool without the “changes data” mark is described as only reading, searching or calculating, or the two runs did not agree. No tool was called. Read the publisher’s full description before relying on it. “Publisher declares” lists the hints the server itself sends with the tool (MCP annotations: read-only, destructive, idempotent, open-world); they are the publisher's claims, not checked by us. Inputs are the parameters in the tool's own input schema: name, declared type, whether it is required, and the first sentence of its description. Read 2026-10-23.

The registry verifies a package once, when it is published, and does not re-check it. A difference below is about the listing, not a judgement of the publisher.