unofficialMCP4Vaillant

An unofficial MCP (Model Context Protocol) server that exposes a Vaillant heat pump's data to AI assistants like Claude. Query outdoor and room temperatures, hot water status, energy consumption, COP estimates, schedules, and diagnostics through natural conversation.

→ holger1411/unofficialMCP4Vaillant · listed on glama

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// key findings

✅

No credential exfiltration, no sensitive file access, no obfuscation

Static analysis found nothing flowing your secrets to unexpected places.

✅

Open source with a license and README

Anyone can audit the code, the license is declared, and the publisher documents what it does.

🔐

You'll be asked for 1 credential: VAILLANT_PASSWORD

These are read from process.env at runtime. Make sure you trust where they’ll be sent.

// required environment variables

This server reads these from process.env. You'll be asked to provide them before it can run.

configVAILLANT_USERNAME— edit .env and set , VAILLANT_PASSWORD,

🔐 secretVAILLANT_PASSWORD— edit .env and set VAILLANT_USERNAME, ,

configVAILLANT_BRAND— and (if not in Germany or not the Vaillant brand) / VAILLANT_COUNTRY.

configVAILLANT_COUNTRY— and (if not in Germany or not the Vaillant brand) VAILLANT_BRAND / .

configVAILLANT_DEFAULT_SYSTEM_ID— _empty_ Override picked system when more than one exists

configVAILLANT_LOG_LEVEL— INFO DEBUG / INFO / WARNING / ERROR

// full audit trail

The full breakdown of what we checked, the deductions that landed, the network hosts, the dependency advisories, and concrete fix guidance is available to verified publishers.

// improvement guidance — verified publishers only

We have 3 concrete improvements we can share with the publisher of this MCP. Each comes with specific guidance to raise the trust score.

// embed badge in your README

[![M8ven Score](https://m8ven.ai/badge/mcp/holger1411-unofficialmcp4vaillant-13fiba)](https://m8ven.ai/mcp/holger1411-unofficialmcp4vaillant-13fiba)

commit: e6a0350dc24b56e6412a4f07072396db17dde523

code hash: f265326e2be88366fa93dccc7e32c062ce442f859b6d215a3a5a16eea6aa2a17

verified: 6/18/2026, 10:35:12 AM

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