General Tools

tttkmbb.com

A general utility server that converts between Gregorian and Chinese lunar calendars, lists solar terms, converts time zones, and calculates fixed-rate loan payments.

1 endpoint9 known toolsFirst detected September 25, 2026Last detected September 25, 2026

ENDPOINT 1

https://tttkmbb.com/mcp

No auth detected

MCP server metadata

Name: Calcgrid
Version: 1.5.5

Capabilities

toolsresources

Server instructions

Calcgrid exposes 530 deterministic calculators through a focused default tool set. For Chinese lunar/Gregorian conversion, 24 solar terms, date-aware IANA time-zone conversion, and fixed-rate loan math, call the matching dedicated tool when its Use when condition matches. Otherwise: 1) call search_calculators with the complete user task, 2) use its input_hints to call run_calculator directly, 3) call get_calculator_schema only when a range, enum or optional field is unclear. Do not call a calculator for trivial arithmetic or unrelated tasks. All tools are read-only and free of side effects. Numbers are plain numbers (percent values as e.g. 6.5), dates are ISO YYYY-MM-DD, lists are JSON arrays. Validation errors are isError results with a code, field and hint — fix the arguments and retry.

Known tools 9

convert_solar_to_lunar

Converts a Gregorian date to the Chinese lunisolar calendar (农历 nongli): lunar year, month (with leap-month flag), day, the sexagenary stems and branches (干支 ganzhi) of year, month and day, zodiac animal, nayin (纳音), the current 24-solar-term period and any traditional festival on that day.

Inferred read-only

convert_lunar_to_solar

Converts a Chinese lunar calendar date (year, month, leap-month flag, day) to the Gregorian date, reporting the weekday, the day's ganzhi (干支) and the length of that lunar month, and validating that the leap month and day exist in that year.

Inferred read-only

list_solar_terms

Lists the 24 solar terms (节气 jieqi) of a Gregorian year with their exact instants: the moments the Sun's apparent longitude reaches multiples of 15°, computed astronomically and shown in a chosen UTC offset (China Standard Time by default).

Inferred read-only

convert_time_zone

Converts a wall-clock date and time from one IANA time zone to another using the tz database rules built into ICU, so the daylight-saving offsets in force on that date are applied automatically.

Inferred read-only

calculate_loan_payment

Computes the level monthly payment of a fully amortizing fixed-rate loan from principal, annual rate and term, plus the total paid and total interest over the life of the loan.

Potential side effects

convert_units

Convert a numeric value between two units of the same physical quantity (length, mass, temperature, area, volume, speed, time, data storage, energy, pressure, power, angle, fuel economy, force, frequency, density, torque).

Inferred read-only

search_calculators

Find the right one of 530 calculators from a complete user task in English or Chinese.

Inferred read-only

run_calculator

Run any of the 530 calculators by calculator_id with an inputs object and return the unified result envelope (values with units, formula, sources, freshness, timestamp, next_actions).

Inferred read-only

get_calculator_schema

Return the full definition of one calculator: inputs (name, type, unit, range, default, enum values, example), outputs, formula, sources, freshness, examples, FAQ and related calculators.

Inferred read-only

CONNECT WITH APPROVAL

Client installation

Review this server and its permissions before adding it. Secret placeholders must be set locally.

Codex

~/.codex/config.toml

[mcp_servers.calcgrid]
url = "https://tttkmbb.com/mcp"
enabled = true

Claude Code

.mcp.json

{
  "mcpServers": {
    "calcgrid": {
      "type": "http",
      "url": "https://tttkmbb.com/mcp"
    }
  }
}

Claude Desktop

Settings → Connectors → Add custom connector

Name: calcgrid
Remote MCP URL: https://tttkmbb.com/mcp

Add this remote URL as a custom connector in Claude Desktop. Availability depends on the user plan and workspace policy.

Cursor

.cursor/mcp.json

{
  "mcpServers": {
    "calcgrid": {
      "url": "https://tttkmbb.com/mcp"
    }
  }
}

Visual Studio Code

.vscode/mcp.json

Add to Visual Studio Code

{
  "servers": {
    "calcgrid": {
      "type": "http",
      "url": "https://tttkmbb.com/mcp"
    }
  }
}

Generic MCP

Client-specific MCP configuration

{
  "name": "calcgrid",
  "transport": "streamable-http",
  "url": "https://tttkmbb.com/mcp"
}

MCP Inspector

Run the official MCP Inspector locally and enter the indexed Streamable HTTP endpoint.

TRUST AND VERIFICATION EVIDENCE

Loading Trust v2 evidence…

Checking the associated registrable domain. The BuiltWith key remains server-side.

Indexed

Evidence is source-attributed and does not guarantee that a third-party server is safe. Risk labels are conservative metadata heuristics.