What is matter-web-controller?

A local MCP server that controls Matter-enabled lights and sensors through a web connection. Matter is a standard used by compatible smart-home devices.

It is for reading sensor information and sending controls to Matter-compatible lights and other supported devices.

It provides a coding agent with a way to query or control supported smart-home devices without handling them manually.

matter-web-controller — MCP server by dongnh

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/dongnh/matter_webcontrol/matter-web-controller

Clone the repo

git clone --depth 1 https://github.com/dongnh/matter_webcontrol

Made for: Claude Code, Codex, Cursor.

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

matter-web-controller 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 yesterday.

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.

listed in the official MCP registry · 8 lines

What it actually says

{ "matter-web-controller": { "command": "uvx", "args": [ "matter-web-controller" ] } }

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.

yesterday First seen · 8 lines scan A 3b1b655b0138

Subscribe to this mod's changes

matter-web-controller is an MCP server published in the GitHub repository dongnh/matter_webcontrol (0 stars, last pushed 21d 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.

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