# io.github.hebcal/hebcal

> Model Context Protocol extension for Hebrew calendar

- name: io.github.hebcal/hebcal
- version: 0.9.9
- connection class: R0 (autonomous)
- trust: 83/100
- quality: 80/100 (good)
- owner: not claimed
- descriptor: https://api.protogrid.dev/v1/servers/io.github.hebcal%2Fhebcal
- tools: https://api.protogrid.dev/v1/servers/io.github.hebcal%2Fhebcal/tools

**An agent can connect right now, no human step.** Remote endpoint, no authentication, reachable on the last probe.

## Connection (mcpServers)

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


## Trust

- hygiene: 100
- liveness: 100
- freshness: 45
- provenance: 80
- drivers: +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.

## Quality 80/100 (good)

### protocol: 88 (weight 25)

- pass `protocol.modern`: supports 2026-07-28 (server/discover)
- pass `protocol.stateless`: answers without a session
- pass `protocol.transport`: streamable HTTP
- warn `protocol.list_ttl`: tools/list declares ttlMs 0, so clients re-fetch it on every use

### authorization: n/a (weight 15)

- n/a `auth.prm`, `auth.as_metadata`, `auth.cimd`: no remote uses OAuth
- n/a `auth.secret_in_url`: no templated URL

### tool hygiene: 71 (weight 30)

- pass `tools.descriptions`: every tool has a description
- pass `tools.description_length`: descriptions are concise
- pass `tools.schemas`: every tool has an object input schema
- fail `tools.annotations`: no tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
- fail `tools.directory_hints`: no 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_cost`: about 646 tokens to load every tool
- pass `tools.api_dump`: tools are not a one-to-one API dump

### stability: 100 (weight 15)

- pass `stability.changes`: no tool changes in 30 days
- pass `stability.rug_pull`: no tool changed its meaning under the same name

### dependencies: 67 (weight 15)

- pass `deps.known_vulns`: no 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/mcp@0.9.8 resolved: 127 packages

- tools: 7, about 646 tokens to load them all
- tool set hash: c6ed51969cec5e8299e6568265fad5d0
- badge: [![protogrid quality](https://protogrid.dev/badge/io.github.hebcal/hebcal.svg)](https://protogrid.dev/servers/io.github.hebcal/hebcal)
- Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed.

### Tool changes

_No tool definition changes recorded._

## Dependencies

- npm @hebcal/mcp@0.9.8: resolved, 126 dependencies, MCP SDK @modelcontextprotocol/sdk 1.30.1
  - GHSA-6qxp-vccf-f47h (high) in `` @modelcontextprotocol/sdk@1.30.1 ``, direct, fixed in `` 1.31.0 ``, advisory summary: "MCP TypeScript SDK: OAuth client could send credentials to an authorization server chosen by the MCP server" https://osv.dev/vulnerability/GHSA-6qxp-vccf-f47h

Dependency graphs from deps.dev; advisories from OSV.dev, including the GitHub Advisory Database and the PyPI Advisory Database; all CC BY 4.0.

## Remotes

- https://www.hebcal.com/mcp (streamable-http, auth none, reachable true, uptime30d 1)

## Packages

- npm @hebcal/mcp@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