mcphvac

mcphvac is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from askmarcel/AskMarcel-MCP. Its token cost is not measured, scanned A, original, MIT.

A remote collection of 15 tools for researching and diagnosing HVAC equipment, covering 126 brands, including error lookups, heat-pump guidance, and diagnostic sessions.

In plain words
What is it for?
Use it for HVAC error-code lookups, model and SKU checks, guided heat-pump diagnosis, and diagnostic-session workflows.
Why use it?
It gives a coding agent access to manufacturer and equipment information that may not be available in its built-in knowledge.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add mcp/askmarcel/askmarcel-mcp/mcphvac
Clone the repo
git clone --depth 1 https://github.com/askmarcel/AskMarcel-MCP

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for mcphvac

README.md
[![agentmods](https://agentmods.dev/badge/mcp/askmarcel/askmarcel-mcp/mcphvac.svg)](https://agentmods.dev/mcp/askmarcel/askmarcel-mcp/mcphvac)
Your own site
<a href="https://agentmods.dev/mcp/askmarcel/askmarcel-mcp/mcphvac"><img src="https://agentmods.dev/badge/mcp/askmarcel/askmarcel-mcp/mcphvac.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

mcphvac scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

server.json · 6 lines

What it actually says

{
  "mcphvac": {
    "url": "https://mcp.askmarcel.app",
    "type": "streamable-http"
  }
}
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 6 lines scan A 26a82c7b6d5f

Subscribe to this mod's changes

mcphvac is an MCP server published in the GitHub repository askmarcel/AskMarcel-MCP (0 stars, last pushed 8d ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.