ClaudSkills / Security / identity-access

Add Gmail Tool

Q: What is a Claude Code skill and how does the Add Gmail Tool skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Add Gmail Tool is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Security · Sub-category: identity-access · Last updated: 2026-05-21

type:cli

Add Gmail as an MCP tool (read, search, send, label, draft) using OneCLI-managed OAuth. The agent gets Gmail tools in every enabled group; OneCLI injects real tokens at request time so no raw credentials are ever in the container or on disk in usable form.

From the source SKILL.md

This skill wires the [@gongrzhe/server-gmail-autoauth-mcp](https://www.npmjs.com/package/@gongrzhe/server-gmail-autoauth-mcp) stdio MCP server into selected agent groups. The MCP server reads stub credentials containing the onecli-managed placeholder; the OneCLI gateway intercepts outbound calls to gmail.googleapis.com and injects the real OAuth bearer from its vault.

What this skill does

Add Gmail Tool is a community-contributed Claude Code skill in the identity-access sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/add-gmail-tool/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Add Gmail Tool Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 116,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/add-gmail-tool
curl -L https://claudskills.com/skills/add-gmail-tool/SKILL.md \
  -o ~/.claude/skills/add-gmail-tool/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/add-gmail-tool/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/add-gmail-tool/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\add-gmail-tool\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Add Gmail Tool Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/add-gmail-tool/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Add Gmail Tool skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Add Gmail Tool skill?

Use Add Gmail Tool when your Claude Code task falls under the Security category — specifically in the identity access area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Add Gmail Tool" or describe the task and let Claude pick). Browse related skills at /category/security/.

What is a Claude Code skill and how does the Add Gmail Tool skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Add Gmail Tool is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/GongRzhe/Gmail-MCP-Server
Author: GongRzhe

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

GongRzhe. (2026). Add Gmail Tool [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/add-gmail-tool/

BibTeX

@misc{add-gmail-tool-2026,
  author    = {GongRzhe},
  title     = {Add Gmail Tool [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/add-gmail-tool/}
}

Embed this skill

Promote, attribute, or link this skill from your own README, blog post, or documentation. All three snippets are free to use — no sign-up, no API key. More distribution surfaces →

Badge

[![ClaudSkills](https://claudskills.com/badge/add-gmail-tool.svg)](https://claudskills.com/skills/add-gmail-tool/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

More Security skills

Browse all Security skills in the ClaudSkills registry, or explore these other picks from the same category:

Browse all Security skills → Top 100 skills

Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills. · What's New · Install guide · About · llms.txt

Part of Acreator Store — Adam Lankamer's AI tools: PerfectStudio · Ucaption · UTagger · AutoXPoster · TestYourSkills · AutomationFlows · Au Naturel · Telegram @acreatorstore