Thumb Gate MCP Server

Self-improving pre-action firewall for AI coding agents AI coding agents repeat mistakes - and one wrong tool call can wipe a directory, leak a key, or push broken code. 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 2026-08-23 · ★ 26 · #10 OF 182 MAINTAINED SECURITY · VERIFIED 2026-08-25

MIT · JavaScript servers · how we verify → /methodology

01 · Install Thumb Gate

Claude Code

claude mcp add igorganapolsky-thumbgate -- npx -y thumbgate

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "igorganapolsky-thumbgate": {
      "command": "npx",
      "args": [
        "-y",
        "thumbgate"
      ]
    }
  }
}

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 thumbgate - unscoped; check the name against the project README before installing

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

03 · What Thumb Gate can do

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

Latest releases

v1.35.2 · 2026-08-17

ThumbGate Agent Governance Action (free) · Composite Action at repo root (action.yml). · Usage · yaml · IgorGanapolsky/[email protected] · with: · doctor # or ai-inventory · fail-on: never # never | attention |…

v1.35.1 · 2026-08-13

Publishes the ThumbGate Agent Governance composite action to GitHub Marketplace. · action.yml at repository root · doctor, ai-inventory · fail-on modes: never, attention, error

v1.35.0 · 2026-08-05

[email protected] · Release Links · GitHub Release: · Publish workflow: · npm published at: 2026-08-05T23:10:38.602Z · npm shasum: f9bf4bc132160fbd1e24553552fba64d619d3cde · npm tarball: · Release ref…

04 · Who maintains Thumb Gate

ThumbGate is maintained by igorganapolsky. It's the only MCP server we track from this author; the repo dates to Mar 2026.

05 · Facts

repository: github.com/igorganapolsky/thumbgate
website: https://thumbgate.ai/
category: security - ranked #10 of 182 actively-maintained security servers as of 2026-08-25.
release cadence: 10+ releases in the last 90 days (latest 2026-08-17)
registry: io.github.IgorGanapolsky/thumbgate (active, first published 2026-05-29 · 4 versions)
packages: npm:thumbgate

06 · Thumb Gate FAQ

What is Thumb Gate?

Is Thumb Gate still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-23 and it shipped 10+ releases in the last 90 days. We re-verify nightly.

How do I install Thumb Gate?

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

Does Thumb Gate 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 Thumb Gate

Alternatives to Thumb Gate

Maintained security servers if Thumb Gate isn't the fit.

Pairs well with

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

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