hebcal
Server Details
Model Context Protocol extension for Hebrew calendar
- Status
- Healthy
- Last Tested
- Transport
- Streamable HTTP
- URL
- Repository
- hebcal/hebcal-mcp
- GitHub Stars
- 6
- Server Listing
- hebcal-mcp
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Tool Definition Quality
Average 3.4/5 across 7 of 7 tools scored.
Every tool has a clearly distinct purpose with no ambiguity. Each tool addresses a specific Jewish calendar or ritual calculation: date conversions, Daf Yomi, holidays, Shabbat times, Torah portion, and Yahrzeit. The descriptions clearly differentiate their functions, making misselection unlikely.
The naming is mostly consistent with a clear verb_noun pattern, using hyphens for readability. Six tools follow this pattern (e.g., convert-gregorian-to-hebrew, shabbat-times), but 'daf-yomi' deviates slightly as it lacks a verb, though it remains intuitive. Overall, the naming is predictable and easy to understand.
With 7 tools, the count is well-scoped for a Jewish calendar and ritual server. Each tool earns its place by covering essential calculations like date conversions, holidays, Shabbat, Torah readings, and memorials. This provides comprehensive coverage without being overwhelming or sparse.
The tool surface is complete for the domain of Jewish calendar and ritual calculations. It covers key aspects: date conversions (both directions), holiday listings, Shabbat timing, Torah portions, Daf Yomi study, and Yahrzeit anniversaries. There are no obvious gaps, allowing agents to handle typical workflows without dead ends.
Available Tools
7 toolsconvert-gregorian-to-hebrewInspect
Converts a Gregorian (civil) date to a Hebrew date (Jewish calendar)
| Name | Required | Description | Default |
|---|---|---|---|
| date | Yes | Gregorian date (in yyyy-MM-dd format) to convert |
convert-hebrew-to-gregorianInspect
Converts a Hebrew date to a Gregorian (civil) date
| Name | Required | Description | Default |
|---|---|---|---|
| day | Yes | Hebrew day of month | |
| year | Yes | Hebrew year | |
| month | Yes | Hebrew month name transliterated, like Elul or Tishrei |
daf-yomiInspect
Calculates the Daf Yomi (Babylonian Talmud) learning for a specified date
| Name | Required | Description | Default |
|---|---|---|---|
| date | Yes | Gregorian date in yyyy-MM-dd format |
jewish-holidays-yearInspect
Calculates a list of all Jewish holidays during a Gregorian (civil) year
| Name | Required | Description | Default |
|---|---|---|---|
| year | Yes | Gregorian year |
shabbat-timesInspect
Generates Shabbat and holiday candle-lighting and Havdalah times for a given location and date range
| Name | Required | Description | Default |
|---|---|---|---|
| tzid | Yes | Olson timezone ID (e.g. "America/Chicago", "Europe/Moscow") | |
| endDate | Yes | End date in yyyy-MM-dd format | |
| latitude | Yes | Latitude as decimal, valid range -90 to +90 (e.g. 41.85003) | |
| longitude | Yes | Longitude as decimal, valid range -180 to +180 (e.g. -87.65005) | |
| startDate | Yes | Start date in yyyy-MM-dd format |
torah-portionInspect
Calculates the weekly Torah portion (also called parashat haShavua) for a specified date
| Name | Required | Description | Default |
|---|---|---|---|
| il | Yes | True if in Israel, false for Diaspora | |
| date | Yes | Gregorian date in yyyy-MM-dd format |
yahrzeitInspect
Calculates the Yahrzeit, the anniversary of the day of death of a loved one, according to the Hebrew calendar for a specified date
| Name | Required | Description | Default |
|---|---|---|---|
| date | Yes | Gregorian date of death (in yyyy-MM-dd format) | |
| afterSunset | Yes | after sunset |
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