Agent skill

Gmail

by CraftOS-dev in CraftOS-dev/CraftBot

Gmail API integration with managed OAuth. An agent skill from CraftOS-dev/CraftBot.

MITAuto-check passedBackend & APIs

Install Gmail

skills CLI
$ npx skills add CraftOS-dev/CraftBot --skill gmail -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install CraftOS-dev/CraftBot gmail --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/CraftOS-dev/CraftBot.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/gmail .claude/skills/gmail && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
gmail
GitHub stars
392
Used in
2 other repos
Token cost
~2.2k tokens
SKILL.md length
375 words
Files
4
Skills in repo
89
Repo updated
First seen
Licence
MIT

At a glance

Gmail API integration with managed OAuth. An agent skill from CraftOS-dev/CraftBot.

  • Works in 3 steps: Sign in or create an account at maton.ai → Go to maton.ai/settings → Copy your API key
  • Users want to interact with Gmail
  • SKILL.md covers Quick Start, Base URL, Authentication and Connection Management, plus 5 more sections
  • Calls python and curl; reaches gateway.maton.ai and ctrl.maton.ai; needs MATON_API_KEY

What it does

Gmail is an agent skill from CraftOS-dev/CraftBot. Gmail API integration with managed OAuth. Read, send, and manage emails, threads, labels, and drafts. Use this skill when users want to interact with Gmail. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway).

Its SKILL.md is about 2.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files (for example `.clawhub/origin.json` and `_meta.json`). Compatibility notes: Requires network access and valid Maton API key

It sits in Backend & APIs, covering Email management, Microservices and OAuth and OpenID Connect. It works with Gmail. The repository describes itself as: One agent. Every kind of work. The licence is MIT.

When your agent uses it

  • Users want to interact with Gmail
  • Tasks that involve Email management
  • Tasks that involve Microservices

Example prompts

  • “/gmail”

Requirements

  • Python 3
  • A credential in MATON_API_KEY
  • A credential in YOUR_API_KEY
  • Compatibility (from SKILL.md): Requires network access and valid Maton API key

Workflow steps

3 steps, taken from the first numbered list in SKILL.md.

  1. Sign in or create an account at maton.ai
  2. Go to maton.ai/settings
  3. Copy your API key

What it can do on your machine

Read from SKILL.md and the folder at commit b50970c. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    Shell commands in SKILL.md call:

    • python
    • curl

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    Hosts in commands or code, which the agent is likely to contact:

    • gateway.maton.ai
    • ctrl.maton.ai
    • connect.maton.ai

    Also links to:

    • developers.google.com
    • maton.ai
    • discord.com

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names these keys or tokens, usually read from environment variables:

    • MATON_API_KEY

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

  • Compatibility

    Requires network access and valid Maton API key

    From compatibility in the SKILL.md frontmatter.

Context cost

Gmail loads about 2.2k tokens when it runs. Until then it costs about 65 tokens; SKILL.md has 375 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~65
When it runs · the whole SKILL.md, loaded when a task matches
~2.2k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from CraftOS-dev/CraftBot at commit b50970c, republished under its MIT licence (© CraftOS-dev). 375 words, ~2,187 tokens.

Download SKILL.mdSave it as .claude/skills/gmail/SKILL.md (or your agent's skills folder). This skill also uses 3 other files; get the full folder from GitHub.
name
gmail
description
Gmail API integration with managed OAuth. Read, send, and manage emails, threads, labels, and drafts. Use this skill when users want to interact with Gmail. For other third party apps, use the api-gateway skill (https://clawhub.ai/byungkyu/api-gateway).
compatibility
Requires network access and valid Maton API key
metadata.author
maton
metadata.version
1.0

Gmail

Access the Gmail API with managed OAuth authentication. Read, send, and manage emails, threads, labels, and drafts.

Quick Start

bash
# List messages
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/google-mail/gmail/v1/users/me/messages?maxResults=10')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Base URL

https://gateway.maton.ai/google-mail/{native-api-path}

Replace {native-api-path} with the actual Gmail API endpoint path. The gateway proxies requests to gmail.googleapis.com and automatically injects your OAuth token.

Authentication

All requests require the Maton API key in the Authorization header:

Authorization: Bearer $MATON_API_KEY

Environment Variable: Set your API key as MATON_API_KEY:

bash
export MATON_API_KEY="YOUR_API_KEY"
Getting Your API Key
  1. Sign in or create an account at maton.ai
  2. Go to maton.ai/settings
  3. Copy your API key

Connection Management

Manage your Google OAuth connections at https://ctrl.maton.ai.

List Connections
bash
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections?app=google-mail&status=ACTIVE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF
Create Connection
bash
python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'google-mail'}).encode()
req = urllib.request.Request('https://ctrl.maton.ai/connections', data=data, method='POST')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Content-Type', 'application/json')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF
Get Connection
bash
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

json
{
  "connection": {
    "connection_id": "21fd90f9-5935-43cd-b6c8-bde9d915ca80",
    "status": "ACTIVE",
    "creation_time": "2025-12-08T07:20:53.488460Z",
    "last_updated_time": "2026-01-31T20:03:32.593153Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "google-mail",
    "metadata": {}
  }
}

Open the returned url in a browser to complete OAuth authorization.

Delete Connection
bash
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections/{connection_id}', method='DELETE')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF
Specifying Connection

If you have multiple Gmail connections, specify which one to use with the Maton-Connection header:

bash
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/google-mail/gmail/v1/users/me/messages')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '21fd90f9-5935-43cd-b6c8-bde9d915ca80')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If omitted, the gateway uses the default (oldest) active connection.

API Reference

List Messages
bash
GET /google-mail/gmail/v1/users/me/messages?maxResults=10

With query filter:

bash
GET /google-mail/gmail/v1/users/me/messages?q=is:unread&maxResults=10
Get Message
bash
GET /google-mail/gmail/v1/users/me/messages/{messageId}

With metadata only:

bash
GET /google-mail/gmail/v1/users/me/messages/{messageId}?format=metadata&metadataHeaders=From&metadataHeaders=Subject&metadataHeaders=Date
Send Message
bash
POST /google-mail/gmail/v1/users/me/messages/send
Content-Type: application/json

{
  "raw": "BASE64_ENCODED_EMAIL"
}
List Labels
bash
GET /google-mail/gmail/v1/users/me/labels
List Threads
bash
GET /google-mail/gmail/v1/users/me/threads?maxResults=10
Get Thread
bash
GET /google-mail/gmail/v1/users/me/threads/{threadId}
Modify Message Labels
bash
POST /google-mail/gmail/v1/users/me/messages/{messageId}/modify
Content-Type: application/json

{
  "addLabelIds": ["STARRED"],
  "removeLabelIds": ["UNREAD"]
}
Trash Message
bash
POST /google-mail/gmail/v1/users/me/messages/{messageId}/trash
Create Draft
bash
POST /google-mail/gmail/v1/users/me/drafts
Content-Type: application/json

{
  "message": {
    "raw": "BASE64URL_ENCODED_EMAIL"
  }
}
Send Draft
bash
POST /google-mail/gmail/v1/users/me/drafts/send
Content-Type: application/json

{
  "id": "{draftId}"
}
Get Profile
bash
GET /google-mail/gmail/v1/users/me/profile

Query Operators

Use in the q parameter:

  • is:unread - Unread messages
  • is:starred - Starred messages
  • from:email@example.com - From specific sender
  • to:email@example.com - To specific recipient
  • subject:keyword - Subject contains keyword
  • after:2024/01/01 - After date
  • before:2024/12/31 - Before date
  • has:attachment - Has attachments

Code Examples

JavaScript
javascript
const response = await fetch(
  'https://gateway.maton.ai/google-mail/gmail/v1/users/me/messages?maxResults=10',
  {
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`
    }
  }
);
Python
python
import os
import requests

response = requests.get(
    "https://gateway.maton.ai/google-mail/gmail/v1/users/me/messages",
    headers={"Authorization": f"Bearer {os.environ['MATON_API_KEY']}"},
    params={"maxResults": 10, "q": "is:unread"},
)
Show full SKILL.md (165 more words)Show less

Notes

  • Use me as userId for the authenticated user
  • Message body is base64url encoded in the raw field
  • Common labels: INBOX, SENT, DRAFT, STARRED, UNREAD, TRASH
  • IMPORTANT: When using curl commands, use curl -g when URLs contain brackets (fields[], sort[], records[]) to disable glob parsing
  • IMPORTANT: When piping curl output to jq or other commands, environment variables like $MATON_API_KEY may not expand correctly in some shell environments. You may get "Invalid API key" errors when piping.

Error Handling

StatusMeaning
400Missing Gmail connection
401Invalid or missing Maton API key
429Rate limited (10 req/sec per account)
4xx/5xxPassthrough error from Gmail API
Troubleshooting: API Key Issues
  1. Check that the MATON_API_KEY environment variable is set:
bash
echo $MATON_API_KEY
  1. Verify the API key is valid by listing connections:
bash
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://ctrl.maton.ai/connections')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF
Troubleshooting: Invalid App Name
  1. Ensure your URL path starts with google-mail. For example:
  • Correct: https://gateway.maton.ai/google-mail/gmail/v1/users/me/messages
  • Incorrect: https://gateway.maton.ai/gmail/v1/users/me/messages

Resources

© CraftOS-dev, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

SKILL.md and 3 other files in skills/gmail of CraftOS-dev/CraftBot.

  • SKILL.md
  • .clawhub/origin.json
  • LICENSE.txt
  • _meta.json

Open the folder on GitHubat commit b50970c

Used in 2 other repositories

We found 2 copies of this SKILL.md (exact, near-identical or edited) in other folders, from 2 other GitHub owners. This page covers the copy in CraftOS-dev/CraftBot, which our catalogue first saw on October 7, 2026.

Compare with similar skills

Gmail next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Gmail compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Gmail this skillCraftOS-dev/CraftBot3922 repos~2.2kAutomated safety check: PassMIT
Google WorkspaceRedWoodOG/Hermes-Desktop177—~2.1kAutomated safety check: PassMIT
Google Loopsgarrytan/gbrain31k—~2.3kAutomated safety check: PassMIT
GCP Workspace Pivotwgpsec/AboutSecurity1.8k—~2.9kAutomated safety check: PassNone
Google Workspaceericrisco/rsc-harness156—~3.2kAutomated safety check: PassMIT
Pp Workspace Adminmvanhorn/printing-press-library2.1k—~11kAutomated safety check: NotesApache-2.0

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Works with

Questions about Gmail

What does Gmail do?

Gmail API integration with managed OAuth. An agent skill from CraftOS-dev/CraftBot. Gmail is an agent skill from CraftOS-dev/CraftBot. Gmail API integration with managed OAuth.

When should I use Gmail?

Gmail fits situations like: users want to interact with Gmail; tasks that involve Email management; tasks that involve Microservices.

How do I install Gmail in Claude Code?

Run `npx skills add CraftOS-dev/CraftBot --skill gmail -a claude-code`. Or copy the skill folder (skills/gmail in CraftOS-dev/CraftBot) into .claude/skills/gmail in your project. Claude Code loads it when a task matches its description.

How do I install Gmail in Codex?

Run `npx skills add CraftOS-dev/CraftBot --skill gmail -a codex`. Or copy the skill folder (skills/gmail in CraftOS-dev/CraftBot) into .agents/skills/gmail in your project. Codex loads it when a task matches its description.

Can I use Gmail in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add CraftOS-dev/CraftBot --skill gmail -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/gmail, .gemini/skills/gmail, .github/skills/gmail and .opencode/skills/gmail in your project.

What does Gmail need to run?

Going by SKILL.md and its folder, Gmail needs the command-line tools its instructions call (python and curl) and credentials named MATON_API_KEY. Our summary lists: Python 3; A credential in MATON_API_KEY; A credential in YOUR_API_KEY. Compatibility (from SKILL.md): Requires network access and valid Maton API key.

Does Gmail access the network?

SKILL.md names 6 domains. In commands or code: gateway.maton.ai, ctrl.maton.ai and connect.maton.ai; the agent is likely to contact these when it follows the instructions. As links in the text: developers.google.com, maton.ai and discord.com. This is read from the text; nothing was executed.

Is Gmail safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Gmail use?

Gmail is published under the MIT licence (from the LICENSE file in the skill folder). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Gmail use?

About 2.2k tokens (SKILL.md is roughly 8.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Gmail?

Skills that share tags, products or a category with Gmail: Google Workspace (RedWoodOG/Hermes-Desktop, 177 stars), Google Loops (garrytan/gbrain, 31k stars), GCP Workspace Pivot (wgpsec/AboutSecurity, 1.8k stars) and Google Workspace (ericrisco/rsc-harness, 156 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Gmail?

CraftOS-dev (a GitHub user) maintains it in CraftOS-dev/CraftBot, which has 392 GitHub stars. The repository holds 89 skills in this directory. The repository was last updated on October 7, 2026.

Source: CraftOS-dev/CraftBot on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.