Customs MCP Server

Inspect an MCP server for common security risks before you install it. Runs fully offline. No telemetry, no cloud upload, no account. It runs locally over stdio via the published package.

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

VERIFIED ACTIVE

LAST COMMIT 2026-07-31 · ★ 2 · #85 OF 182 MAINTAINED SECURITY · VERIFIED 2026-08-25

Apache-2.0 · JavaScript servers · how we verify → /methodology

01 · Install Customs

Claude Code

claude mcp add mcpcustoms-mcp-customs -- npx -y mcp-customs

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "mcpcustoms-mcp-customs": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-customs"
      ]
    }
  }
}

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 Apache-2.0 - declared in the repository

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

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

03 · Who maintains Customs

MCP Customs is maintained by mcpcustoms. It's the only MCP server we track from this author; the repo dates to Jun 2026.

04 · Facts

repository: github.com/mcpcustoms/mcp-customs
category: security - ranked #85 of 182 actively-maintained security servers as of 2026-08-25.
registry: io.github.mcpcustoms/mcp-customs (active, first published 2026-08-03)
packages: npm:mcp-customs

05 · Customs FAQ

What is Customs?

Inspect an MCP server for common security risks before you install it. Runs fully offline. No telemetry, no cloud upload, no account. It runs locally over stdio via the published package.

Is Customs still maintained?

Yes - as of 2026-08-25, its last commit was 2026-07-31. We re-verify nightly.

How do I install Customs?

Run `npx -y mcp-customs`. You can also paste the ready-made client config above.

Does Customs 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.

06 · Alternatives to Customs

Alternatives to Customs

Maintained security servers if Customs isn't the fit.

Pairs well with

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

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