Gmail

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).

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

Quick Start

CLI:

maton google-mail message list -L 10

maton api '/google-mail/gmail/v1/users/me/messages?maxResults=10'

Python:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.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://api.maton.ai/google-mail/{native-api-path}

Maton proxies requests to gmail.googleapis.com and automatically injects your OAuth token.

Installation

NPM:

npm install -g @maton-ai/cli

Homebrew:

brew install maton-ai/cli/maton

Authentication

CLI:

maton login                          # Opens browser for API key
maton login --interactive            # Skip browser, paste API key directly
maton whoami                         # Show current auth state

Manual:

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

export MATON_API_KEY="YOUR_API_KEY"

Connection Management

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

List Connections

CLI:

maton connection list google-mail --status ACTIVE

maton api -X GET /connections -f app=google-mail -f status=ACTIVE

Python:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.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

CLI:

maton connection create google-mail

maton api /connections -f app=google-mail

Python:

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'google-mail'}).encode()
req = urllib.request.Request('https://api.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

CLI:

maton connection view {connection_id}

maton api /connections/{connection_id}

Python:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.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:

{
  "connection": {
    "connection_id": "{connection_id}",
    "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

CLI:

maton connection delete {connection_id}

maton api -X DELETE /connections/{connection_id}

Python:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.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:

CLI:

maton google-mail message list -L 10 --connection {connection_id}

maton api /google-mail/gmail/v1/users/me/messages --connection {connection_id}

Python:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.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', '{connection_id}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

If you have multiple connections, always specify the connection to ensure requests go to the intended account.

Security & Permissions

• Access is scoped to messages, threads, labels, drafts, and email sending within the connected Gmail account.
• All write operations require explicit user approval. Before executing any create, update, or delete call, confirm the target resource and intended effect with the user.

API Reference

List Messages

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

Example:

maton google-mail message list -L 10

With query filter:

GET /google-mail/gmail/v1/users/me/messages?q=is:unread&maxResults=10

Example:

maton google-mail message list --query 'is:unread' -L 10

Get Message

GET /google-mail/gmail/v1/users/me/messages/{messageId}

Example:

maton google-mail message view {messageId} --headers

With metadata only:

GET /google-mail/gmail/v1/users/me/messages/{messageId}?format=metadata&metadataHeaders=From&metadataHeaders=Subject&metadataHeaders=Date

Example:

maton google-mail message view {messageId} --fetch-format metadata --metadata-header From,Subject,Date

Send Message

POST /google-mail/gmail/v1/users/me/messages/send
Content-Type: application/json

{
  "raw": "BASE64_ENCODED_EMAIL"
}

Example:

maton google-mail message send --to [e-mail] --subject 'Hello' --body 'Hi there!'

Reply to Message

maton google-mail message reply {messageId} --body 'Thanks!'

Forward Message

maton google-mail message forward {messageId} --to [e-mail] --body 'FYI'

List Labels

GET /google-mail/gmail/v1/users/me/labels

Example:

maton google-mail label list

List Threads

GET /google-mail/gmail/v1/users/me/threads?maxResults=10

Example:

maton google-mail thread list -L 10

Get Thread

GET /google-mail/gmail/v1/users/me/threads/{threadId}

Example:

maton google-mail thread view {threadId}

Modify Message Labels

POST /google-mail/gmail/v1/users/me/messages/{messageId}/modify
Content-Type: application/json

{
  "addLabelIds": ["STARRED"],
  "removeLabelIds": ["UNREAD"]
}

Example:

maton google-mail message modify {messageId} --add-label STARRED --remove-label UNREAD

Trash Message

POST /google-mail/gmail/v1/users/me/messages/{messageId}/trash

Example:

maton google-mail message trash {messageId}

Create Draft

POST /google-mail/gmail/v1/users/me/drafts
Content-Type: application/json

{
  "message": {
    "raw": "BASE64URL_ENCODED_EMAIL"
  }
}

Example:

maton google-mail draft create --to [e-mail] --subject 'Hello' --body 'Draft content here'

Send Draft

POST /google-mail/gmail/v1/users/me/drafts/send
Content-Type: application/json

{
  "id": "{draftId}"
}

Example:

maton google-mail draft send {draftId}

Get Profile

GET /google-mail/gmail/v1/users/me/profile

Query Operators

Use in the q parameter:

• is:unread - Unread messages
• is:starred - Starred messages
• from:[e-mail] - From specific sender
• to:[e-mail] - 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

CLI

# List unread messages with headers
maton google-mail message list --hydrate

# Filter with jq — e.g., only messages from a specific sender
maton google-mail message list -L 20 --query 'from:[e-mail]' --json --jq '.messages[].id'

# List all threads with pagination
maton google-mail thread list --paginate --query 'newer_than:7d'

JavaScript

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

Python

import os
import requests

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

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

Status	Meaning
400	Missing Gmail connection
401	Invalid or missing Maton API key
429	Rate limited (10 req/sec per account)
4xx/5xx	Passthrough error from Gmail API

Troubleshooting: API Key Issues

CLI:

1. Check your auth state:

maton whoami

2. Verify the API key is valid by listing connections:

maton connection list

Manual:

1. Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

2. Verify the API key is valid by listing connections:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.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://api.maton.ai/google-mail/gmail/v1/users/me/messages
• Incorrect: https://api.maton.ai/gmail/v1/users/me/messages

Resources

• Gmail API Overview
• List Messages
• Get Message
• Send Message
• List Threads
• List Labels
• Create Draft
• Maton CLI Manual
• Maton Community
• Maton Support