Hebcal MCP Server

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

People connecting productivity tools to Claude, Cursor, VS Code, or another MCP client. The project is written in TypeScript.

NO LONGER MAINTAINED

LAST COMMIT 2026-09-11 · ★ 7 · VERIFIED 2026-09-18

BSD-2-Clause · TypeScript servers · how we verify → /methodology

01 · Install Hebcal

Claude Code

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

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "hebcal-hebcal-mcp": {
      "url": "https://www.hebcal.com/mcp"
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

https://www.hebcal.com/mcp

transport: streamable-http

endpoint alive - responded to MCP initialize · probed 2026-09-17

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions · remote - your agent's requests go to www.hebcal.com

endpoint auth accepted our unauthenticated MCP initialize - no credentials needed to connect

repository archived on GitHub - read-only; no future fixes, security or otherwise

license BSD-2-Clause - declared in the repository

npm package @hebcal/mcp - published under the repo owner's npm scope (@hebcal)

registry namespace io.github.hebcal is GitHub-verified and matches the repo owner

03 · What Hebcal can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v0.10.3 · 2026-05-31

add npm Trusted Publishing release workflow

v0.10.2 · 2026-05-08

Update dependencies

v0.10.1 · 2026-04-10

Update dependencies

04 · Who maintains Hebcal

hebcal is maintained by hebcal. It's the only MCP server we track from this author; the repo dates to Mar 2025.

05 · Facts

repository: github.com/hebcal/hebcal-mcp
category: productivity - dead as of 2026-09-18.
registry: io.github.hebcal/hebcal (active, first published 2026-02-23 · 2 versions)
packages: npm:@hebcal/mcp

06 · Hebcal FAQ

What is Hebcal?

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

Is Hebcal still maintained?

Its last commit was 2026-09-11 (as of 2026-09-18) - we classify it as dead.

How do I install Hebcal?

Run `npx -y @hebcal/mcp`. You can also paste the ready-made client config above.

Does Hebcal require authentication?

No - the endpoint accepted our unauthenticated MCP initialize when probed on 2026-09-17; you can connect without credentials.

07 · Alternatives to Hebcal

Alternatives to Hebcal

Maintained productivity servers if Hebcal isn't the fit.

Pairs well with

Servers that cover what Hebcal doesn't - only shown when the pairing reason fits the companion.