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Hebcal

hebcal/hebcal-mcp

Connects Claude to Hebcal's Jewish calendar APIs, giving you programmatic access to holiday dates, Shabbat candle lighting times, Torah readings, and Hebrew date conversions. You can generate Jewish holidays for any year past or future, look up yahrzeits and anniversaries, and get both full kriyah and triennial Torah reading schedules. Runs over stdio by default or as an SSE server on HTTP. Reach for this when you're building apps that need accurate Jewish calendar calculations or when you want Claude to answer questions about Hebrew dates and observances without hardcoding holiday tables.

GitHub stars
6
tools
7
transport
STDIO, HTTP
last updated
Feb 23, 2026
View on GitHub

Install

From registry metadata
$ npx add-mcp https://www.hebcal.com/mcp --name hebcal

Run in your terminal. add-mcp asks which agents to add it to (Claude Code, Codex, Cursor and more). Add -g to install it for every project.

Review the command, arguments and environment values before installing. MCP servers run with your local permissions.

Other ways

Claude Code

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

Run in your terminal. Add --scope user to make it available in every project.

Tools

Verified live · 7 tools

Verified live against the running server on Nov 6, 2026.

convert-gregorian-to-hebrewConverts a Gregorian (civil) date to a Hebrew date (Jewish calendar)1 params

Converts a Gregorian (civil) date to a Hebrew date (Jewish calendar)

Parameters* required
date*string
Gregorian date (in yyyy-MM-dd format) to convert
convert-hebrew-to-gregorianConverts a Hebrew date to a Gregorian (civil) date3 params

Converts a Hebrew date to a Gregorian (civil) date

Parameters* required
day*integer
Hebrew day of month
month*string
Hebrew month name transliterated, like Elul or Tishrei
year*integer
Hebrew year
daf-yomiCalculates the Daf Yomi (Babylonian Talmud) learning for a specified date1 params

Calculates the Daf Yomi (Babylonian Talmud) learning for a specified date

Parameters* required
date*string
Gregorian date in yyyy-MM-dd format
jewish-holidays-yearCalculates a list of all Jewish holidays during a Gregorian (civil) year1 params

Calculates a list of all Jewish holidays during a Gregorian (civil) year

Parameters* required
year*integer
Gregorian year
shabbat-timesGenerates Shabbat and holiday candle-lighting and Havdalah times for a given location and date range5 params

Generates Shabbat and holiday candle-lighting and Havdalah times for a given location and date range

Parameters* required
endDate*string
End date in yyyy-MM-dd format
latitude*number
Latitude as decimal, valid range -90 to +90 (e.g. 41.85003)
longitude*number
Longitude as decimal, valid range -180 to +180 (e.g. -87.65005)
startDate*string
Start date in yyyy-MM-dd format
tzid*string
Olson timezone ID (e.g. "America/Chicago", "Europe/Moscow")
torah-portionCalculates the weekly Torah portion (also called parashat haShavua) for a specified date2 params

Calculates the weekly Torah portion (also called parashat haShavua) for a specified date

Parameters* required
date*string
Gregorian date in yyyy-MM-dd format
il*boolean
True if in Israel, false for Diaspora
yahrzeitCalculates the Yahrzeit, the anniversary of the day of death of a loved one, according to the Hebrew calendar for a specified date2 params

Calculates the Yahrzeit, the anniversary of the day of death of a loved one, according to the Hebrew calendar for a specified date

Parameters* required
afterSunset*boolean
after sunset
date*string
Gregorian date of death (in yyyy-MM-dd format)

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Readme

Hebcal Jewish holidays and Hebrew calendar Model Context Protocol (MCP) server

This repository has moved. This functionality now lives at hebcal/hebcal-api-go. This repo is archived and read-only; please file issues and send pull requests there instead.

Hebcal (pronounced HEEB-kal, as in Hebrew calendar) is a free Jewish calendar and holiday web site.

Our mission is to increase awareness of Jewish holidays and to help Jews to be observant of the mitzvot.

Details

Repository
github.com/hebcal/hebcal-mcp
Category
Productivity & Office
Package
@hebcal/mcp
Transport
STDIO, HTTP
Registry
MCP registry, active
Tools verified
Nov 6, 2026

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