Gmail

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

Quick Start

# 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

:

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

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

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

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:

{
  "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

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:

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

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

With query filter:

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

Get Message

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

With metadata only:

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

Send Message

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

{
  "raw": "BASE64_ENCODED_EMAIL"
}

List Labels

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

List Threads

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

Get Thread

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

Modify Message Labels

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

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

Trash Message

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

Create Draft

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

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

Send Draft

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

{
  "id": "{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: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

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

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'}
)

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

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://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

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