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8 clients · secrets stay placeholders

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{
  "mcpServers": {
    "hebcal": {
      "type": "http",
      "url": "https://www.hebcal.com/mcp"
    }
  }
}

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

[mcp_servers.hebcal]
url = "https://www.hebcal.com/mcp"

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "hebcal": {
      "type": "remote",
      "url": "https://www.hebcal.com/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "hebcal": {
      "type": "http",
      "url": "https://www.hebcal.com/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=hebcal&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vd3d3LmhlYmNhbC5jb20vbWNwIn0%3D"
}

{
  "servers": {
    "hebcal": {
      "type": "http",
      "url": "https://www.hebcal.com/mcp"
    }
  }
}

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

extensions:
  "hebcal":
    enabled: true
    name: "hebcal"
    type: streamable_http
    uri: "https://www.hebcal.com/mcp"
    timeout: 300

Quality 80 / 100good

protocol88 · weight 25

pass
protocol.modernsupports 2026-07-28 (server/discover)
pass
protocol.statelessanswers without a session
pass
protocol.transportstreamable HTTP
warn
protocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every use

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene71 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
fail
tools.annotationsno tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: convert-gregorian-to-hebrew (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); torah-portion (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); daf-yomi (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); …
pass
tools.token_costabout 646 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependencies67 · weight 15

pass
deps.known_vulnsno known advisory in 127 resolved packages
fail
deps.mcp_sdk_version@modelcontextprotocol/sdk 1.30.1 has 1 known advisory (GHSA-6qxp-vccf-f47h); update @modelcontextprotocol/sdk to 1.31.0 or later
pass
deps.resolvable@hebcal/[email protected] resolved: 127 packages

7 tools, about 646 tokens to load them all · tool set c6ed51969cec · checked 2026-10-20 09:31 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 83 / 100

provenance80

liveness100

freshness45

hygiene100

+repository +namespace-matches-repo +reachable +uptime-100% -stale-239d

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Dependencies

@hebcal/[email protected] npm126 dependencies, resolved · MCP SDK @modelcontextprotocol/sdk 1.30.1 · advisories checked 2026-10-19

advisory	severity	package	fixed in
GHSA-6qxp-vccf-f47hMCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server	high	`@modelcontextprotocol/[email protected]`MCP SDK, direct	fixed in `1.31.0`

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0. The graph is what a clean install of this version resolves today; nothing was installed or run. How it is checked.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://www.hebcal.com/mcp` streamable-http	none	yes	100%	167 ms	2026-07-28, 2025-11-25, 2025-06-18, 2025-03-26, 2024-11-05	2026-10-20

package	registry	version	runtime	secrets
`@hebcal/mcp`	npm	0.9.8	–

Tools (7)

`convert-gregorian-to-hebrew`	Converts a Gregorian (civil) date to a Hebrew date (Jewish calendar)
`convert-hebrew-to-gregorian`	Converts a Hebrew date to a Gregorian (civil) date
`daf-yomi`	Calculates the Daf Yomi (Babylonian Talmud) learning for a specified date
`jewish-holidays-year`	Calculates a list of all Jewish holidays during a Gregorian (civil) year
`shabbat-times`	Generates Shabbat and holiday candle-lighting and Havdalah times for a given location and date range
`torah-portion`	Calculates the weekly Torah portion (also called parashat haShavua) for a specified date
`yahrzeit`	Calculates the Yahrzeit, the anniversary of the day of death of a loved one, according to the Hebrew calendar for a specified date

Schemas: list_tools.

Similar MCP servers

Official server.json

{
  "name": "io.github.hebcal/hebcal",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://www.hebcal.com/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.9.9",
  "packages": [
    {
      "version": "0.9.8",
      "transport": {
        "type": "stdio"
      },
      "identifier": "@hebcal/mcp",
      "registryType": "npm"
    }
  ],
  "repository": {
    "url": "https://github.com/hebcal/hebcal-mcp",
    "source": "github"
  },
  "description": "Model Context Protocol extension for Hebrew calendar"
}