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

Replace {native-api-path} with the actual SendGrid API endpoint path. The gateway proxies requests to api.sendgrid.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

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

Connection Management

Manage your SendGrid 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=sendgrid&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': 'sendgrid'}).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": "943c6cd5-9a56-4f5b-8adf-ecd4a140049f",
    "status": "ACTIVE",
    "creation_time": "2026-02-11T10:53:41.817938Z",
    "last_updated_time": "2026-02-11T10:54:05.554084Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "sendgrid",
    "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 SendGrid 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/sendgrid/v3/user/profile')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('Maton-Connection', '943c6cd5-9a56-4f5b-8adf-ecd4a140049f')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

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

API Reference

All SendGrid API endpoints follow this pattern:

/sendgrid/v3/{resource}

Mail Send

Send Email

POST /sendgrid/v3/mail/send
Content-Type: application/json

{
  "personalizations": [
    {
      "to": [{"email": "recipient@example.com", "name": "Recipient"}],
      "subject": "Hello from SendGrid"
    }
  ],
  "from": {"email": "sender@example.com", "name": "Sender"},
  "content": [
    {
      "type": "text/plain",
      "value": "This is a test email."
    }
  ]
}

With HTML content:

POST /sendgrid/v3/mail/send
Content-Type: application/json

{
  "personalizations": [
    {
      "to": [{"email": "recipient@example.com"}],
      "subject": "HTML Email"
    }
  ],
  "from": {"email": "sender@example.com"},
  "content": [
    {
      "type": "text/html",
      "value": "<h1>Hello</h1><p>This is an HTML email.</p>"
    }
  ]
}

With template:

POST /sendgrid/v3/mail/send
Content-Type: application/json

{
  "personalizations": [
    {
      "to": [{"email": "recipient@example.com"}],
      "dynamic_template_data": {
        "first_name": "John",
        "order_id": "12345"
      }
    }
  ],
  "from": {"email": "sender@example.com"},
  "template_id": "d-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
}

User Profile

Get User Profile

GET /sendgrid/v3/user/profile

Response:

{
  "type": "user",
  "userid": 59796657
}

Get Account Details

GET /sendgrid/v3/user/account

Marketing Contacts

List Contacts

GET /sendgrid/v3/marketing/contacts

Response:

{
  "result": [],
  "contact_count": 0,
  "_metadata": {
    "self": "https://api.sendgrid.com/v3/marketing/contacts"
  }
}

Search Contacts

POST /sendgrid/v3/marketing/contacts/search
Content-Type: application/json

{
  "query": "email LIKE '%@example.com%'"
}

Add/Update Contacts

PUT /sendgrid/v3/marketing/contacts
Content-Type: application/json

{
  "contacts": [
    {
      "email": "contact@example.com",
      "first_name": "John",
      "last_name": "Doe"
    }
  ]
}

Response:

{
  "job_id": "2387e363-4104-4225-8960-4a5758492351"
}

Note: Contact operations are asynchronous. Use the job status endpoint to check progress.

Get Import Job Status

GET /sendgrid/v3/marketing/contacts/imports/{job_id}

Response:

{
  "id": "2387e363-4104-4225-8960-4a5758492351",
  "status": "pending",
  "job_type": "upsert_contacts",
  "results": {
    "requested_count": 1,
    "created_count": 1
  },
  "started_at": "2026-02-11T11:00:14Z"
}

Delete Contacts

DELETE /sendgrid/v3/marketing/contacts?ids=contact_id_1,contact_id_2

Get Contact by ID

GET /sendgrid/v3/marketing/contacts/{contact_id}

Get Contact by Email

POST /sendgrid/v3/marketing/contacts/search/emails
Content-Type: application/json

{
  "emails": ["contact@example.com"]
}

Marketing Lists

List All Lists

GET /sendgrid/v3/marketing/lists

Response:

{
  "result": [],
  "_metadata": {
    "self": "https://api.sendgrid.com/v3/marketing/lists?page_size=100&page_token="
  }
}

Create List

POST /sendgrid/v3/marketing/lists
Content-Type: application/json

{
  "name": "My Contact List"
}

Response:

{
  "name": "My Contact List",
  "id": "b050f139-4231-47c8-bf32-94ad76376d3b",
  "contact_count": 0,
  "_metadata": {
    "self": "https://api.sendgrid.com/v3/marketing/lists/b050f139-4231-47c8-bf32-94ad76376d3b"
  }
}

Get List by ID

GET /sendgrid/v3/marketing/lists/{list_id}

Update List

PATCH /sendgrid/v3/marketing/lists/{list_id}
Content-Type: application/json

{
  "name": "Updated List Name"
}

Delete List

DELETE /sendgrid/v3/marketing/lists/{list_id}

Add Contacts to List

PUT /sendgrid/v3/marketing/contacts
Content-Type: application/json

{
  "list_ids": ["list_id"],
  "contacts": [
    {"email": "contact@example.com"}
  ]
}

Segments

List Segments

GET /sendgrid/v3/marketing/segments

Create Segment

POST /sendgrid/v3/marketing/segments
Content-Type: application/json

{
  "name": "Active Users",
  "query_dsl": "email_clicks > 0"
}

Get Segment by ID

GET /sendgrid/v3/marketing/segments/{segment_id}

Delete Segment

DELETE /sendgrid/v3/marketing/segments/{segment_id}

Templates

List Templates

GET /sendgrid/v3/templates

With generation filter:

GET /sendgrid/v3/templates?generations=dynamic

Create Template

POST /sendgrid/v3/templates
Content-Type: application/json

{
  "name": "My Template",
  "generation": "dynamic"
}

Response:

{
  "id": "d-ffcdb43ed8a04beba48a702e1717ddb5",
  "name": "My Template",
  "generation": "dynamic",
  "updated_at": "2026-02-11 11:00:20",
  "versions": []
}

Get Template by ID

GET /sendgrid/v3/templates/{template_id}

Update Template

PATCH /sendgrid/v3/templates/{template_id}
Content-Type: application/json

{
  "name": "Updated Template Name"
}

Delete Template

DELETE /sendgrid/v3/templates/{template_id}

Create Template Version

POST /sendgrid/v3/templates/{template_id}/versions
Content-Type: application/json

{
  "name": "Version 1",
  "subject": "{{subject}}",
  "html_content": "<html><body><h1>Hello {{name}}</h1></body></html>",
  "active": 1
}

Response:

{
  "id": "54230a99-1e89-4edf-821d-d4925b40c64b",
  "template_id": "d-ffcdb43ed8a04beba48a702e1717ddb5",
  "active": 1,
  "name": "Version 1",
  "html_content": "<html><body><h1>Hello {{name}}</h1></body></html>",
  "plain_content": "Hello {{name}}",
  "generate_plain_content": true,
  "subject": "{{subject}}",
  "editor": "code",
  "thumbnail_url": "//..."
}

Senders

List Senders

GET /sendgrid/v3/senders

Create Sender

POST /sendgrid/v3/senders
Content-Type: application/json

{
  "nickname": "My Sender",
  "from": {"email": "sender@example.com", "name": "Sender Name"},
  "reply_to": {"email": "reply@example.com", "name": "Reply To"},
  "address": "123 Main St",
  "city": "San Francisco",
  "country": "USA"
}

Response:

{
  "id": 8513177,
  "nickname": "My Sender",
  "from": {"email": "sender@example.com", "name": "Sender Name"},
  "reply_to": {"email": "reply@example.com", "name": "Reply To"},
  "address": "123 Main St",
  "city": "San Francisco",
  "country": "USA",
  "verified": {"status": false, "reason": null},
  "updated_at": 1770786031,
  "created_at": 1770786031,
  "locked": false
}

Note: Sender verification is required before use. Check verified.status.

Get Sender by ID

GET /sendgrid/v3/senders/{sender_id}

Update Sender

PATCH /sendgrid/v3/senders/{sender_id}
Content-Type: application/json

{
  "nickname": "Updated Sender Name"
}

Delete Sender

DELETE /sendgrid/v3/senders/{sender_id}

Suppressions

Bounces

# List bounces
GET /sendgrid/v3/suppression/bounces

# Get bounce by email
GET /sendgrid/v3/suppression/bounces/{email}

# Delete bounces
DELETE /sendgrid/v3/suppression/bounces
Content-Type: application/json

{
  "emails": ["bounce@example.com"]
}

Blocks

# List blocks
GET /sendgrid/v3/suppression/blocks

# Get block by email
GET /sendgrid/v3/suppression/blocks/{email}

# Delete blocks
DELETE /sendgrid/v3/suppression/blocks
Content-Type: application/json

{
  "emails": ["blocked@example.com"]
}

Invalid Emails

# List invalid emails
GET /sendgrid/v3/suppression/invalid_emails

# Delete invalid emails
DELETE /sendgrid/v3/suppression/invalid_emails
Content-Type: application/json

{
  "emails": ["invalid@example.com"]
}

Spam Reports

# List spam reports
GET /sendgrid/v3/suppression/spam_reports

# Delete spam reports
DELETE /sendgrid/v3/suppression/spam_reports
Content-Type: application/json

{
  "emails": ["spam@example.com"]
}

Global Unsubscribes

# List global unsubscribes
GET /sendgrid/v3/suppression/unsubscribes

# Add to global unsubscribes
POST /sendgrid/v3/asm/suppressions/global
Content-Type: application/json

{
  "recipient_emails": ["unsubscribe@example.com"]
}

Unsubscribe Groups (ASM)

List Groups

GET /sendgrid/v3/asm/groups

Create Group

POST /sendgrid/v3/asm/groups
Content-Type: application/json

{
  "name": "Weekly Newsletter",
  "description": "Weekly newsletter updates"
}

Response:

{
  "name": "Weekly Newsletter",
  "id": 122741,
  "description": "Weekly newsletter updates",
  "is_default": false
}

Get Group by ID

GET /sendgrid/v3/asm/groups/{group_id}

Update Group

PATCH /sendgrid/v3/asm/groups/{group_id}
Content-Type: application/json

{
  "name": "Updated Group Name"
}

Delete Group

DELETE /sendgrid/v3/asm/groups/{group_id}

Add Suppressions to Group

POST /sendgrid/v3/asm/groups/{group_id}/suppressions
Content-Type: application/json

{
  "recipient_emails": ["user@example.com"]
}

List Suppressions in Group

GET /sendgrid/v3/asm/groups/{group_id}/suppressions

Statistics

Get Global Stats

GET /sendgrid/v3/stats?start_date=2026-02-01

With end date:

GET /sendgrid/v3/stats?start_date=2026-02-01&end_date=2026-02-28

Response:

[
  {
    "date": "2026-02-01",
    "stats": [
      {
        "metrics": {
          "blocks": 0,
          "bounce_drops": 0,
          "bounces": 0,
          "clicks": 0,
          "deferred": 0,
          "delivered": 0,
          "invalid_emails": 0,
          "opens": 0,
          "processed": 0,
          "requests": 0,
          "spam_report_drops": 0,
          "spam_reports": 0,
          "unique_clicks": 0,
          "unique_opens": 0,
          "unsubscribe_drops": 0,
          "unsubscribes": 0
        }
      }
    ]
  }
]

Category Stats

GET /sendgrid/v3/categories/stats?start_date=2026-02-01&categories=category1,category2

Mailbox Provider Stats

GET /sendgrid/v3/mailbox_providers/stats?start_date=2026-02-01

Browser Stats

GET /sendgrid/v3/browsers/stats?start_date=2026-02-01

API Keys

List API Keys

GET /sendgrid/v3/api_keys

Response:

{
  "result": [
    {
      "name": "MatonTest",
      "api_key_id": "WJBgv5EKR8y0nn2F8Qfk5w"
    }
  ]
}

Create API Key

POST /sendgrid/v3/api_keys
Content-Type: application/json

{
  "name": "New API Key",
  "scopes": ["mail.send", "alerts.read"]
}

Get API Key by ID

GET /sendgrid/v3/api_keys/{api_key_id}

Update API Key

PATCH /sendgrid/v3/api_keys/{api_key_id}
Content-Type: application/json

{
  "name": "Updated Key Name"
}

Delete API Key

DELETE /sendgrid/v3/api_keys/{api_key_id}

Pagination

SendGrid uses token-based pagination for marketing endpoints:

GET /sendgrid/v3/marketing/lists?page_size=100&page_token={token}

Response includes:

{
  "result": [...],
  "_metadata": {
    "self": "https://api.sendgrid.com/v3/marketing/lists?page_size=100&page_token=",
    "next": "https://api.sendgrid.com/v3/marketing/lists?page_size=100&page_token=abc123"
  }
}

For suppression endpoints, use limit and offset:

GET /sendgrid/v3/suppression/bounces?limit=100&offset=0

Code Examples

JavaScript

// Send an email
const response = await fetch(
  'https://gateway.maton.ai/sendgrid/v3/mail/send',
  {
    method: 'POST',
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`,
      'Content-Type': 'application/json'
    },
    body: JSON.stringify({
      personalizations: [{
        to: [{email: 'recipient@example.com'}],
        subject: 'Hello'
      }],
      from: {email: 'sender@example.com'},
      content: [{type: 'text/plain', value: 'Hello World'}]
    })
  }
);

Python

import os
import requests

# Get email stats
response = requests.get(
    'https://gateway.maton.ai/sendgrid/v3/stats',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'},
    params={'start_date': '2026-02-01'}
)
data = response.json()
for day in data:
    metrics = day['stats'][0]['metrics']
    print(f"{day['date']}: {metrics['delivered']} delivered, {metrics['opens']} opens")

Notes

All requests use JSON content type
Dates are in YYYY-MM-DD format
Template IDs for dynamic templates start with d-
Mail send returns 202 Accepted on success (not 200)
Marketing contact operations are asynchronous - use job status endpoints
Suppression endpoints support date filtering with start_time and end_time (Unix timestamps)
IMPORTANT: When using curl commands, use curl -g when URLs contain brackets 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

Error Handling

Status	Meaning
400	Bad request or validation error
401	Invalid or missing Maton API key
403	Insufficient permissions
404	Resource not found
429	Rate limited
500	Internal server error

Troubleshooting: API Key Issues

Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

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

Ensure your URL path starts with sendgrid. For example:

Correct: https://gateway.maton.ai/sendgrid/v3/user/profile
Incorrect: https://gateway.maton.ai/v3/user/profile

sendgrid

SendGrid

Quick Start

Base URL