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Everyday calculators and converters for AI assistants: units, dates, percentages, text, JSON.

Utilities

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calculate_age Read-only

Exact age from a birth date: years, months, days, total days and days until the next birthday.

birth_datestring, required

YYYY-MM-DD

as_ofstring

YYYY-MM-DD, default today (UTC).

CodeKitHub MCP server | mcptry

Tools (13)

calculate_age

Exact age from a birth date: years, months, days, total days and days until the next birthday.

read-only

Argument	Type	Description
as_of	string	YYYY-MM-DD, default today (UTC).
birth_date*	string	YYYY-MM-DD

Input schema (JSON)

{
  "type": "object",
  "required": [
    "birth_date"
  ],
  "properties": {
    "as_of": {
      "type": "string",
      "description": "YYYY-MM-DD, default today (UTC)."
    },
    "birth_date": {
      "type": "string",
      "description": "YYYY-MM-DD"
    }
  }
}

calculate_percentage

Percentage maths. percent_of: a% of b. what_percent: a is what % of b. percent_change: change from a to b.

read-only

Argument	Type	Description
a*	number
b*	number
mode*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "mode",
    "a",
    "b"
  ],
  "properties": {
    "a": {
      "type": "number"
    },
    "b": {
      "type": "number"
    },
    "mode": {
      "enum": [
        "percent_of",
        "what_percent",
        "percent_change"
      ],
      "type": "string"
    }
  }
}

color_convert

Convert a colour between HEX, RGB and HSL.

read-only

Argument	Type	Description
color*	string	#1d6fe0, rgb(29, 111, 224) or hsl(215, 77%, 50%)

Input schema (JSON)

{
  "type": "object",
  "required": [
    "color"
  ],
  "properties": {
    "color": {
      "type": "string",
      "description": "#1d6fe0, rgb(29, 111, 224) or hsl(215, 77%, 50%)"
    }
  }
}

compound_interest

Compound interest with optional monthly contributions: final balance, total contributed and interest earned.

read-only

Argument	Type	Description
years*	number
principal*	number
compounds_per_year	integer	Default 12.
annual_rate_percent*	number
monthly_contribution	number	Default 0.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "principal",
    "annual_rate_percent",
    "years"
  ],
  "properties": {
    "years": {
      "type": "number"
    },
    "principal": {
      "type": "number"
    },
    "compounds_per_year": {
      "type": "integer",
      "description": "Default 12."
    },
    "annual_rate_percent": {
      "type": "number"
    },
    "monthly_contribution": {
      "type": "number",
      "description": "Default 0."
    }
  }
}

convert_case

Change text case: upper, lower, title, sentence, camel, pascal, snake, kebab or constant.

read-only

Argument	Type	Description
text*	string
style*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "text",
    "style"
  ],
  "properties": {
    "text": {
      "type": "string"
    },
    "style": {
      "enum": [
        "upper",
        "lower",
        "title",
        "sentence",
        "camel",
        "pascal",
        "snake",
        "kebab",
        "constant"
      ],
      "type": "string"
    }
  }
}

convert_units

Convert between units of length, mass, volume, area, speed, time, data size and temperature, e.g. 5 miles to km or 72 F to C.

read-only

Argument	Type	Description
to*	string
from*	string	Unit, e.g. mi, km, lb, kg, gal, l, mph, GB, MiB, C, F, K.
value*	number

Input schema (JSON)

{
  "type": "object",
  "required": [
    "value",
    "from",
    "to"
  ],
  "properties": {
    "to": {
      "type": "string"
    },
    "from": {
      "type": "string",
      "description": "Unit, e.g. mi, km, lb, kg, gal, l, mph, GB, MiB, C, F, K."
    },
    "value": {
      "type": "number"
    }
  }
}

date_difference

Days, weeks and calendar years/months/days between two dates.

read-only

Argument	Type	Description
end_date*	string	YYYY-MM-DD
start_date*	string	YYYY-MM-DD

Input schema (JSON)

{
  "type": "object",
  "required": [
    "start_date",
    "end_date"
  ],
  "properties": {
    "end_date": {
      "type": "string",
      "description": "YYYY-MM-DD"
    },
    "start_date": {
      "type": "string",
      "description": "YYYY-MM-DD"
    }
  }
}

encode_decode

Encode or decode text: Base64, URL, HTML entities, hex.

read-only

Argument	Type	Description
mode*	string
text*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "mode",
    "text"
  ],
  "properties": {
    "mode": {
      "enum": [
        "base64_encode",
        "base64_decode",
        "url_encode",
        "url_decode",
        "html_escape",
        "html_unescape",
        "hex_encode",
        "hex_decode"
      ],
      "type": "string"
    },
    "text": {
      "type": "string"
    }
  }
}

find_tool

Find a free online tool on CodeKitHub (there are hundreds: converters, calculators, generators, text, code and image tools). Returns the tool page link.

read-only

Argument	Type	Description
query*	string
max_results	integer

Input schema (JSON)

{
  "type": "object",
  "required": [
    "query"
  ],
  "properties": {
    "query": {
      "type": "string"
    },
    "max_results": {
      "type": "integer",
      "maximum": 15,
      "minimum": 1
    }
  }
}

hash_text

SHA hash of a text (SHA-1, SHA-256, SHA-384, SHA-512). Do not send secrets you need to keep private.

read-only

Argument	Type	Description
text*	string
algorithm	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "text"
  ],
  "properties": {
    "text": {
      "type": "string"
    },
    "algorithm": {
      "enum": [
        "SHA-1",
        "SHA-256",
        "SHA-384",
        "SHA-512"
      ],
      "type": "string"
    }
  }
}

json_tools

Format, minify or validate JSON.

read-only

Argument	Type	Description
json*	string
action	string
indent	integer

Input schema (JSON)

{
  "type": "object",
  "required": [
    "json"
  ],
  "properties": {
    "json": {
      "type": "string"
    },
    "action": {
      "enum": [
        "format",
        "minify",
        "validate"
      ],
      "type": "string"
    },
    "indent": {
      "type": "integer",
      "maximum": 8,
      "minimum": 1
    }
  }
}

text_stats

Count characters, words, sentences, paragraphs and lines, and estimate reading time.

read-only

Argument	Type	Description
text*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "text"
  ],
  "properties": {
    "text": {
      "type": "string"
    }
  }
}

timestamp_convert

Convert a Unix timestamp (seconds or milliseconds) or an ISO date to both forms; "now" gives the current time.

read-only

Argument	Type	Description
value*	string

Input schema (JSON)

{
  "type": "object",
  "required": [
    "value"
  ],
  "properties": {
    "value": {
      "type": "string"
    }
  }
}