What is mcp-server-browser?

A local MCP server that gives a coding agent access to a web browser. It runs through the @agent-infra/mcp-server-browser package and needs a DISPLAY setting.

Use it for tasks that need browser use from an agent, such as interacting with or inspecting web pages.

It lets browser-related work run through a locally started service instead of requiring the agent to work without browser access.

mcp-server-browser — MCP server by bytedance

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/bytedance/ui-tars-desktop/template-default-mcp-server-browser

Clone the repo

git clone --depth 1 https://github.com/bytedance/UI-TARS-desktop

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

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

mcp-server-browser 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.

packages/agent-infra/create-new-mcp/template-default/server.json · 12 lines

What it actually says

{
  "mcp-server-browser": {
    "command": "npx",
    "args": [
      "-y",
      "@agent-infra/mcp-server-browser"
    ],
    "env": {
      "DISPLAY": ""
    }
  }
}

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 · 12 lines scan A dc060e9a1453

Subscribe to this mod's changes

mcp-server-browser is an MCP server published in the GitHub repository bytedance/UI-TARS-desktop (38,753 stars, last pushed 27d ago), licensed Apache-2.0. 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 2026-08-30.

Browser automation DevOps and cloud agent computer-use mcp mcp-server vision vlm

mcp-server-browser

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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