Hebcal (Jewish Calendar)
About
Integrates with Hebrew calendar libraries to provide date conversions, yahrzeit calculations, and Torah portion information for Jewish religious observances.
Details
- Author
- hebcal
- Repository
- hebcal/hebcal-mcp
- GitHub stars
- 2
- License
- BSD 2-Clause "Simplified" License
- Categories
- Design, Developer Tools, AI, Infrastructure, Knowledge Base
Jump to
Setting up with Highlight
This MCP is not yet compatible with Highlight’s one-click setup. However, you can still use it with Highlight by following these steps:
- Download and install Highlight from highlightai.com/download
- Navigate to the plugins tab and select "Add Custom Plugin"
-
Configure the plugin with the settings below
Plugin Name
Hebcal (Jewish Calendar)Command (node, npx, python, etc.)nodeArguments-
Argument 1
build/server.js
Environment-
NODE_PORT
3000
Please refer to the README for specific instructions on how to obtain API keys or other required environment variables.
-
Argument 1
- Enable "Start Automatically" if you want the plugin to start when Highlight launches
From the repository
This MCP server can run in two modes:
1. Stdio Mode (default): Communicates over standard input/output.
npm install
npm run build
node build/cli.js
2. Server-Sent Events (SSE) Mode: Communicates over HTTP using SSE.
npm install
npm run build
node build/server.js
The SSE endpoint will be available at
http://localhost:8080/mcp by default. You can configure the port using the NODE_PORT environment variable (e.g., NODE_PORT=3000 node build/server.js).
You can test the SSE endpoint with curl:
curl -N http://localhost:8080/mcp
Then, in a separate terminal, you can send MCP requests (as JSON) to the server via its stdin if you are also running it in stdio mode, or by sending HTTP POST requests if you were to implement an HTTP ingress for requests. For now, the SSE transport only handles outgoing messages. For a full duplex SSE communication, the client would also need to send requests to the server (e.g. via POST requests to a different endpoint). This example focuses on the server sending events to the client.
Claude Desktop / Cursor
Paste into your MCP client config file to install this server.
{
"mcpServers": {
"hebcal (jewish calendar)": {
"env": {
"NODE_PORT": "3000"
},
"args": [
"build/server.js"
],
"command": "node"
}
}
}Linux
{
"env": {
"NODE_PORT": "3000"
},
"args": [
"build/server.js"
],
"command": "node"
}Macos
{
"env": {
"NODE_PORT": "3000"
},
"args": [
"build/server.js"
],
"command": "node"
}Windows
{
"env": {
"NODE_PORT": "3000"
},
"args": [
"/c",
"node",
"build/server.js"
],
"command": "cmd"
}Hebcal Jewish holidays and Hebrew calednar Model Context Protocol (MCP) server
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.
This repository is the MCP server equivalent of the powerful custom Jewish calendar tool that lets you generate a list of Jewish holidays for any year (past, present or future).
Also available are a Hebrew date converter, Shabbat candle lighting times and Torah readings (both full kriyah and triennial system), and a page to look up yahrzeits, birthdays and anniversaries.
Running the Server
This MCP server can run in two modes:
1. Stdio Mode (default): Communicates over standard input/output.
npm install
npm run build
node build/cli.js
2. Server-Sent Events (SSE) Mode: Communicates over HTTP using SSE.
npm install
npm run build
node build/server.js
The SSE endpoint will be available at
http://localhost:8080/mcp by default. You can configure the port using the NODE_PORT environment variable (e.g., NODE_PORT=3000 node build/server.js).
You can test the SSE endpoint with curl:
curl -N http://localhost:8080/mcp
Then, in a separate terminal, you can send MCP requests (as JSON) to the server via its stdin if you are also running it in stdio mode, or by sending HTTP POST requests if you were to implement an HTTP ingress for requests. For now, the SSE transport only handles outgoing messages. For a full duplex SSE communication, the client would also need to send requests to the server (e.g. via POST requests to a different endpoint). This example focuses on the server sending events to the client.
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