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Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Code & DevOps

io.github.hebcal/hebcal

By hebcal Verified namespace

Model Context Protocol extension for Hebrew calendar

Source codeProductivity & docs
Connect to io.github.hebcal/hebcal
Checks passed
12 / 22

2 failed · 8 not measured

Median response
338 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
7

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Responded

The server completed its last measured handshake. This is an observation, not a guarantee.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
310
Publisher identityCan the publisher be traced to its source?
312

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 338 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name hebcal.

  • Pass
    Lists tools

    tools/list returned 7 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 338 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 338 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Pass
    Parameters documented

    15 of 15 parameters have a description (100%). The bar is 80%.

  • Fail
    Safety hints

    7 tools set neither readOnlyHint nor destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Not measured
    Website matches publisher

    This namespace is not a reverse domain, so the website comparison does not apply.

  • Pass
    Source repo linked

    A repository URL is on file.

  • Pass
    Repo owner matches

    The GitHub repository owner matches the namespace login.

  • Fail
    Recently updated

    Updated 2026-02-23T00:49:36.003485Z, which is older than 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using io.github.hebcal/hebcal

Connect to this server

Choose your client, copy the configuration, then enable the server in your client’s MCP settings.

Run this command in your terminal, then restart Claude Code.

Claude Code

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

Capabilities

Tools 7

convert-gregorian-to-hebrew

Converts a Gregorian (civil) date to a Hebrew date (Jewish calendar)

Discovered
convert-hebrew-to-gregorian

Converts a Hebrew date to a Gregorian (civil) date

Discovered
daf-yomi

Calculates the Daf Yomi (Babylonian Talmud) learning for a specified date

Discovered
jewish-holidays-year

Calculates a list of all Jewish holidays during a Gregorian (civil) year

Discovered
shabbat-times

Generates Shabbat and holiday candle-lighting and Havdalah times for a given location and date range

Discovered
torah-portion

Calculates the weekly Torah portion (also called parashat haShavua) for a specified date

Discovered
yahrzeit

Calculates the Yahrzeit, the anniversary of the day of death of a loved one, according to the Hebrew calendar for a specified date

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected338 ms7

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