B+

mcpcalc.com

Item: mcpcalc.com
Rating: 87
Author: wmcp.sh

https://mcpcalc.com/api/v1/mcp

87/100 · MCP Trust Grade · checked 5h ago · MCP 2025-03-26

✓ 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 — 10 tools · Database

list_calculators

List available calculators, optionally filtered by category

get_calculator_schema

Get the input schema for a specific calculator

calculate

Run a calculation and get results + prefilled URL

generate_prefilled_url

Generate a prefilled URL without running calculation

calculate_cas

Evaluate one or more headless CAS expressions server-side (MCP-only numeric mode). Unsupported expressions return a GUI handoff link.

calculate_cas_headless

Alias of calculate_cas. Headless MCP-only CAS evaluator; if unsupported features are requested, returns GUI handoff details.

create_session

Create a new interactive session for any calculator and return the session URL

get_session_state

Retrieve the current field values, computation transcript, and pending message queue for an active session

push_session_action

Push actions into a session's message queue (set fields, submit computation, trigger plot, etc.)

close_session

Close a session and optionally persist a snapshot of its final state

Spec conformance20%100

✓ initialize → protocolVersion 2025-03-26
✓ initialize HTTP 200
✓ unknown method → -32601
✓ tools/list → 10 tools
✓ every tool has name + inputSchema

Security (OWASP MCP)30%100

10 tools scanned
no injection markup
no secret-path refs

Reliability / performance20%70

single-probe latency 3065ms (PRELIMINARY — continuous uptime/p95 from proxy telemetry lands in v2)

Tool hygiene15%80

100% of tools have typed inputSchema
0/10 declare outputSchema
no unannotated destructive tools

Transparency / provenance15%70

HTTPS ✓
advertises protocol 2025-03-26

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 mcpcalc.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 — mcpcalc.com grade B+

Share on X Open card image

https://wmcp.sh/mcp/grade/mcpcalc.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 B+](https://wmcp.sh/mcp/grade/mcpcalc.com/badge.svg)](https://wmcp.sh/mcp/grade/mcpcalc.com)

HTML

<a href="https://wmcp.sh/mcp/grade/mcpcalc.com"><img src="https://wmcp.sh/mcp/grade/mcpcalc.com/badge.svg" alt="MCP Trust Grade B+ · 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.