Cws MCP Server

MCP server for Chrome Web Store extension management. Upload, publish, and manage Chrome extensions directly from Claude Code or any MCP client. Its 7 documented tools cluster into create & write, update, delete, deploy. It runs locally over stdio via the published package.

People connecting browser automation tools to Claude, Cursor, VS Code, or another MCP client. The project is written in JavaScript.

VERIFIED ACTIVE

LAST COMMIT 2026-08-06 · ★ 3 · #113 OF 196 MAINTAINED BROWSER AUTOMATION · VERIFIED 2026-08-25

MIT · JavaScript servers · how we verify → /methodology

01 · Install Cws

before you install - you'll need

Set CWS_CLIENT_ID, CWS_CLIENT_SECRET, CWS_REFRESH_TOKEN before connecting. CWS_PUBLISHER_ID, CWS_ITEM_ID are optional or environment-specific per the README.

Claude Code

claude mcp add mikusnuz-cws-mcp -- npx -y cws-mcp

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "mikusnuz-cws-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "cws-mcp"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

npm package cws-mcp - unscoped; check the name against the project README before installing

registry namespace io.github.mikusnuz is GitHub-verified and matches the repo owner

03 · What Cws can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

With this server connected, an agent can upload a ZIP file to Chrome Web Store (update existing item draft), publish an extension with optional staged rollout, publish type, and skip-review, cancel a pending submission, and set staged rollout percentage (0-100, must exceed current target).

Capability map

Tools grouped from the project's README - what Cws lets an agent do.

create & write

2 tools - e.g. Upload a ZIP file to Chrome Web Store (update existing item draft); Publish an extension with optional staged rollout, publish type, and skip-review

upload · publish

update

2 tools - e.g. Update listing metadata via v1.1 API (deprecated Oct 2026); Update listing metadata via dashboard UI automation (Playwright)

update-metadata · update-metadata-ui

delete

1 tool - e.g. Cancel a pending submission

cancel

Deploy

1 tool - e.g. Set staged rollout percentage (0-100, must exceed current target)

deploy-percentage

read & search

1 tool - e.g. Read draft/published listing metadata (v1.1 API, deprecated Oct 2026)

get

Latest releases

v1.4.1 · 2026-03-19

Release v1.4.1

04 · Who maintains Cws

cws is maintained by mikusnuz. We track 9 MCP servers from mikusnuz - 9 actively maintained, 135 combined GitHub stars, oldest repo from Feb 2026. Full record: all servers from mikusnuz.

05 · Facts

repository: github.com/mikusnuz/cws-mcp
category: browser automation - ranked #113 of 196 actively-maintained browser automation servers as of 2026-08-25.
registry: io.github.mikusnuz/cws (active, first published 2026-03-19)
packages: npm:cws-mcp

06 · Cws FAQ

Is Cws still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-06. We re-verify nightly.

What can Cws do?

How do I install Cws?

Run `npx -y cws-mcp`. The README documents 5 environment variables (CWS_CLIENT_ID, CWS_CLIENT_SECRET, CWS_REFRESH_TOKEN…) to set first. Set CWS_CLIENT_ID, CWS_CLIENT_SECRET, CWS_REFRESH_TOKEN before connecting. CWS_PUBLISHER_ID, CWS_ITEM_ID are optional or environment-specific per the README. You can also paste the ready-made client config above.

Does Cws run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Cws

Alternatives to Cws

Maintained browser automation servers if Cws isn't the fit.

Pairs well with

Servers that cover what Cws doesn't - only shown when the pairing reason fits the companion.

More browser automation MCP servers · Acrawl · Mobai MCP · Toolpiper · Rippr MCP

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