A-

www.hebcal.com

Item: www.hebcal.com
Rating: 91
Author: wmcp.sh

https://www.hebcal.com/mcp

91/100 · MCP Trust Grade · checked 5h ago · MCP 2025-06-18

✓ Watched since 2026-06-03 — behavioral baseline locked. We re-check this server's tool surface on a schedule; if it adds, removes, or silently rewrites a tool (rug-pull), we record it.

What it offers — 7 tools · Maps & Geo

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

yahrzeit

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

torah-portion

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

jewish-holidays-year

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

daf-yomi

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

shabbat-times

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

Spec conformance20%100

✓ initialize → protocolVersion 2025-06-18
✓ initialize HTTP 200
✓ unknown method → -32601
✓ tools/list → 7 tools
✓ every tool has name + inputSchema

Security (OWASP MCP)30%100

7 tools scanned
no injection markup
no secret-path refs

Reliability / performance20%92

single-probe latency 307ms (PRELIMINARY — continuous uptime/p95 from proxy telemetry lands in v2)

Tool hygiene15%80

100% of tools have typed inputSchema
0/7 declare outputSchema
no unannotated destructive tools

Transparency / provenance15%70

HTTPS ✓
advertises protocol 2025-06-18

Observed behavior

No proxied traffic observed for this host yet. Connect it at /connect and its grade gains a measured Reliability score + per-tool behavioral evidence — the half a static scan can't produce.

Findings

No blocking issues found in the static + spec checks.

Grade another server

We re-grade www.hebcal.com on a schedule and alert your Slack/webhook the moment its tools change or its grade drops — rug-pull insurance for the connection.

Share this report card

A 1200×630 card with the grade + audit — drop it in a post, Slack, or your repo.

MCP Trust report card — www.hebcal.com grade A-

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https://wmcp.sh/mcp/grade/www.hebcal.com

Embed this grade

A live badge — it re-verifies itself and shows current stability. Static scorecards can't. Paste it in your README or site to show users you're independently audited.

Markdown (for your README)

[![MCP Trust Grade A-](https://wmcp.sh/mcp/grade/www.hebcal.com/badge.svg)](https://wmcp.sh/mcp/grade/www.hebcal.com)

HTML

<a href="https://wmcp.sh/mcp/grade/www.hebcal.com"><img src="https://wmcp.sh/mcp/grade/www.hebcal.com/badge.svg" alt="MCP Trust Grade A- · wmcp.sh"></a>

Agents: check this before connecting

Add the wmcp.sh trust oracle as an MCP server and call grade_mcp_server / check_mcp_drift in your agent's pre-connection gate:

https://wmcp.sh/mcp/trust

How this grade is computed. An open, independent rubric — Spec conformance (20%), Security mapped to the OWASP MCP Top 10 (30%), Reliability (20%), Tool hygiene (15%), Transparency (15%) — run by connecting to the server and inspecting its real MCP surface. The grade is free and identical whether or not the operator pays. v1 uses static + spec signals from a single connection; continuous uptime, real latency, and annotation-truthing (declared readOnly vs observed behavior) layer on via the wmcp.sh proxy.