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io.github.hebcal/hebcal

by hebcal · remote · local (npm) · no sign-in to list tools · v0.9.9 · published by GitHub user hebcal

Model Context Protocol extension for Hebrew calendar

Changes · 7
CompareRegistry entry

7 tools: 7 change things.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http hebcal https://www.hebcal.com/mcp

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

7 tools

Changes things 7Claude Code: ask
  • convert-gregorian-to-hebrewConverts a Gregorian (civil) date to a Hebrew date (Jewish calendar)No findings

    Why it is in this group

    • The name "convert-gregorian-to-hebrew" says "convert": a word for a change.
    Description, as the server wrote it
    Converts a Gregorian (civil) date to a Hebrew date (Jewish calendar)
  • convert-hebrew-to-gregorianConverts a Hebrew date to a Gregorian (civil) dateNo findings

    Why it is in this group

    • The name "convert-hebrew-to-gregorian" says "convert": a word for a change.
    Description, as the server wrote it
    Converts a Hebrew date to a Gregorian (civil) date
  • daf-yomiCalculates the Daf Yomi (Babylonian Talmud) learning for a specified dateNo findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Calculates the Daf Yomi (Babylonian Talmud) learning for a specified date
  • jewish-holidays-yearCalculates a list of all Jewish holidays during a Gregorian (civil) yearNo findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Calculates a list of all Jewish holidays during a Gregorian (civil) year
  • shabbat-timesGenerates Shabbat and holiday candle-lighting and Havdalah times for a given location and date rangeNo findings

    Why it is in this group

    • The description's first verb is "generate": a word for a change.
    Description, as the server wrote it
    Generates Shabbat and holiday candle-lighting and Havdalah times for a given location and date range
  • torah-portionCalculates the weekly Torah portion (also called parashat haShavua) for a specified dateNo findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Calculates the weekly Torah portion (also called parashat haShavua) for a specified date
  • yahrzeitCalculates the Yahrzeit, the anniversary of the day of death of a loved one, according to the Hebrew calendar for a specified dateNo findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    Calculates the Yahrzeit, the anniversary of the day of death of a loved one, according to the Hebrew calendar for a specified date

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.9.9. Values in angle brackets are yours to fill in.

claude mcp add --transport http hebcal https://www.hebcal.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__hebcal__convert-gregorian-to-hebrew",
      "mcp__hebcal__convert-hebrew-to-gregorian",
      "mcp__hebcal__daf-yomi",
      "mcp__hebcal__jewish-holidays-year",
      "mcp__hebcal__shabbat-times",
      "mcp__hebcal__torah-portion",
      "mcp__hebcal__yahrzeit"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as hebcal. Review it before you use it.