Twilio

Access the Twilio API with managed OAuth authentication. Send SMS messages, make voice calls, manage phone numbers, and work with Twilio resources.

Quick Start

# List all accounts
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/twilio/2010-04-01/Accounts.json')
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/twilio/2010-04-01/Accounts/{AccountSid}/{resource}.json

Maton proxies requests to api.twilio.com and automatically injects your OAuth token.

Important: Most Twilio endpoints require your Account SID in the path. You can get your Account SID from the /Accounts.json endpoint.

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 Twilio OAuth connections at https://api.maton.ai.

List Connections

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections?app=twilio&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': 'twilio'}).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

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": "2026-02-09T23:18:44.243582Z",
    "last_updated_time": "2026-02-09T23:19:55.176687Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "twilio",
    "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://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 Twilio connections, specify which one to use with the Maton-Connection header:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/twilio/2010-04-01/Accounts.json')
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 include this header to ensure requests go to the intended account.

Security & Permissions

• Access is scoped to messages, calls, phone numbers, and conversations within the connected Twilio 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

Accounts

List Accounts

GET /twilio/2010-04-01/Accounts.json

Response:

{
  "accounts": [
    {
      "sid": "ACf5d980cd4b3f7604a464afaec191fc60",
      "friendly_name": "My first Twilio account",
      "status": "active",
      "date_created": "Mon, 09 Feb 2026 20:19:55 +0000",
      "date_updated": "Mon, 09 Feb 2026 20:20:05 +0000"
    }
  ]
}

Get Account

GET /twilio/2010-04-01/Accounts/{AccountSid}.json

Messages (SMS/MMS)

List Messages

GET /twilio/2010-04-01/Accounts/{AccountSid}/Messages.json

Query Parameters:

• PageSize - Number of results per page (default: 50)
• To - Filter by recipient phone number
• From - Filter by sender phone number
• DateSent - Filter by date sent

Response:

{
  "messages": [
    {
      "sid": "SMxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "body": "Hello!",
      "from": "+15551234567",
      "to": "+15559876543",
      "status": "delivered",
      "date_sent": "Mon, 09 Feb 2026 21:00:00 +0000"
    }
  ],
  "page": 0,
  "page_size": 50
}

Get Message

GET /twilio/2010-04-01/Accounts/{AccountSid}/Messages/{MessageSid}.json

Send Message

POST /twilio/2010-04-01/Accounts/{AccountSid}/Messages.json
Content-Type: application/x-www-form-urlencoded

To=+15559876543&From=+15551234567&Body=Hello%20from%20Twilio!

Required Parameters:

• To - Recipient phone number (E.164 format)
• From - Twilio phone number or messaging service SID
• Body - Message text (max 1600 characters)

Optional Parameters:

• MessagingServiceSid - Use instead of From for message routing
• MediaUrl - URL of media to send (MMS)
• StatusCallback - Webhook URL for status updates

Response:

{
  "sid": "SMxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "body": "Hello from Twilio!",
  "from": "+15551234567",
  "to": "+15559876543",
  "status": "queued",
  "date_created": "Mon, 09 Feb 2026 21:00:00 +0000"
}

Update Message (Redact)

POST /twilio/2010-04-01/Accounts/{AccountSid}/Messages/{MessageSid}.json
Content-Type: application/x-www-form-urlencoded

Body=

Setting Body to empty string redacts the message content.

Delete Message

DELETE /twilio/2010-04-01/Accounts/{AccountSid}/Messages/{MessageSid}.json

Returns 204 No Content on success.

Calls (Voice)

List Calls

GET /twilio/2010-04-01/Accounts/{AccountSid}/Calls.json

Query Parameters:

• PageSize - Results per page
• Status - Filter by status (queued, ringing, in-progress, completed, etc.)
• To - Filter by recipient
• From - Filter by caller

Response:

{
  "calls": [
    {
      "sid": "CAxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "from": "+15551234567",
      "to": "+15559876543",
      "status": "completed",
      "duration": "60",
      "direction": "outbound-api"
    }
  ],
  "page": 0,
  "page_size": 50
}

Get Call

GET /twilio/2010-04-01/Accounts/{AccountSid}/Calls/{CallSid}.json

Make Call

POST /twilio/2010-04-01/Accounts/{AccountSid}/Calls.json
Content-Type: application/x-www-form-urlencoded

To=+15559876543&From=+15551234567&Url=https://example.com/twiml

Required Parameters:

• To - Recipient phone number
• From - Twilio phone number
• Url - TwiML application URL

Optional Parameters:

• StatusCallback - Webhook URL for call status updates
• StatusCallbackEvent - Events to receive (initiated, ringing, answered, completed)
• Timeout - Seconds to wait for answer (default: 60)
• Record - Set to true to record the call

Update Call

POST /twilio/2010-04-01/Accounts/{AccountSid}/Calls/{CallSid}.json
Content-Type: application/x-www-form-urlencoded

Status=completed

Use Status=completed to end an in-progress call.

Delete Call

DELETE /twilio/2010-04-01/Accounts/{AccountSid}/Calls/{CallSid}.json

Phone Numbers

List Incoming Phone Numbers

GET /twilio/2010-04-01/Accounts/{AccountSid}/IncomingPhoneNumbers.json

Response:

{
  "incoming_phone_numbers": [
    {
      "sid": "PNxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "phone_number": "+15551234567",
      "friendly_name": "My Number",
      "capabilities": {
        "voice": true,
        "sms": true,
        "mms": true
      }
    }
  ]
}

Get Phone Number

GET /twilio/2010-04-01/Accounts/{AccountSid}/IncomingPhoneNumbers/{PhoneNumberSid}.json

Update Phone Number

POST /twilio/2010-04-01/Accounts/{AccountSid}/IncomingPhoneNumbers/{PhoneNumberSid}.json
Content-Type: application/x-www-form-urlencoded

FriendlyName=Updated%20Name&VoiceUrl=https://example.com/voice

Delete Phone Number

DELETE /twilio/2010-04-01/Accounts/{AccountSid}/IncomingPhoneNumbers/{PhoneNumberSid}.json

Applications

List Applications

GET /twilio/2010-04-01/Accounts/{AccountSid}/Applications.json

Response:

{
  "applications": [
    {
      "sid": "APxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "friendly_name": "My App",
      "voice_url": "https://example.com/voice",
      "sms_url": "https://example.com/sms"
    }
  ]
}

Get Application

GET /twilio/2010-04-01/Accounts/{AccountSid}/Applications/{ApplicationSid}.json

Create Application

POST /twilio/2010-04-01/Accounts/{AccountSid}/Applications.json
Content-Type: application/x-www-form-urlencoded

FriendlyName=My%20App&VoiceUrl=https://example.com/voice

Response:

{
  "sid": "APxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "friendly_name": "My App",
  "voice_url": "https://example.com/voice",
  "date_created": "Tue, 10 Feb 2026 00:20:15 +0000"
}

Update Application

POST /twilio/2010-04-01/Accounts/{AccountSid}/Applications/{ApplicationSid}.json
Content-Type: application/x-www-form-urlencoded

FriendlyName=Updated%20App%20Name

Delete Application

DELETE /twilio/2010-04-01/Accounts/{AccountSid}/Applications/{ApplicationSid}.json

Returns 204 No Content on success.

Queues

List Queues

GET /twilio/2010-04-01/Accounts/{AccountSid}/Queues.json

Response:

{
  "queues": [
    {
      "sid": "QUxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
      "friendly_name": "Support Queue",
      "current_size": 0,
      "max_size": 1000,
      "average_wait_time": 0
    }
  ]
}

Create Queue

POST /twilio/2010-04-01/Accounts/{AccountSid}/Queues.json
Content-Type: application/x-www-form-urlencoded

FriendlyName=Support%20Queue&MaxSize=100

Update Queue

POST /twilio/2010-04-01/Accounts/{AccountSid}/Queues/{QueueSid}.json
Content-Type: application/x-www-form-urlencoded

FriendlyName=Updated%20Queue%20Name

Delete Queue

DELETE /twilio/2010-04-01/Accounts/{AccountSid}/Queues/{QueueSid}.json

Addresses

List Addresses

GET /twilio/2010-04-01/Accounts/{AccountSid}/Addresses.json

Create Address

POST /twilio/2010-04-01/Accounts/{AccountSid}/Addresses.json
Content-Type: application/x-www-form-urlencoded

FriendlyName=Office&Street=123%20Main%20St&City=San%20Francisco&Region=CA&PostalCode=94105&IsoCountry=US&CustomerName=Acme%20Inc

Usage Records

List Usage Records

GET /twilio/2010-04-01/Accounts/{AccountSid}/Usage/Records.json

Query Parameters:

• Category - Filter by usage category (calls, sms, etc.)
• StartDate - Start date (YYYY-MM-DD)
• EndDate - End date (YYYY-MM-DD)

Response:

{
  "usage_records": [
    {
      "category": "sms",
      "description": "SMS Messages",
      "count": "100",
      "price": "0.75",
      "start_date": "2026-02-01",
      "end_date": "2026-02-28"
    }
  ]
}

Pagination

Twilio uses page-based pagination:

GET /twilio/2010-04-01/Accounts/{AccountSid}/Messages.json?PageSize=50&Page=0

Parameters:

• PageSize - Results per page (default: 50)
• Page - Page number (0-indexed)

Response includes:

{
  "messages": [...],
  "page": 0,
  "page_size": 50,
  "first_page_uri": "/2010-04-01/Accounts/{AccountSid}/Messages.json?PageSize=50&Page=0",
  "next_page_uri": "/2010-04-01/Accounts/{AccountSid}/Messages.json?PageSize=50&Page=1",
  "previous_page_uri": null
}

Use next_page_uri to fetch the next page of results.

Code Examples

JavaScript

const response = await fetch(
  'https://api.maton.ai/twilio/2010-04-01/Accounts.json',
  {
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`
    }
  }
);
const data = await response.json();
const accountSid = data.accounts[0].sid;
console.log(`Account SID: ${accountSid}`);

Python

import os
import requests

# Get account SID
response = requests.get(
    'https://api.maton.ai/twilio/2010-04-01/Accounts.json',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'}
)
account_sid = response.json()['accounts'][0]['sid']
print(f"Account SID: {account_sid}")

Python (Send SMS)

import os
import requests

account_sid = 'ACxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

response = requests.post(
    f'https://api.maton.ai/twilio/2010-04-01/Accounts/{account_sid}/Messages.json',
    headers={
        'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}',
        'Content-Type': 'application/x-www-form-urlencoded'
    },
    data={
        'To': '+15559876543',
        'From': '+15551234567',
        'Body': 'Hello from Python!'
    }
)
message = response.json()
print(f"Message SID: {message['sid']}")
print(f"Status: {message['status']}")

Python (Make Call)

import os
import requests

account_sid = 'ACxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'

response = requests.post(
    f'https://api.maton.ai/twilio/2010-04-01/Accounts/{account_sid}/Calls.json',
    headers={
        'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}',
        'Content-Type': 'application/x-www-form-urlencoded'
    },
    data={
        'To': '+15559876543',
        'From': '+15551234567',
        'Url': 'https://demo.twilio.com/docs/voice.xml'
    }
)
call = response.json()
print(f"Call SID: {call['sid']}")
print(f"Status: {call['status']}")

Notes

• All endpoints require the /2010-04-01/ API version prefix
• Most endpoints require your Account SID in the path
• Request bodies use application/x-www-form-urlencoded format (not JSON)
• Phone numbers must be in E.164 format (+15551234567)
• SIDs are unique identifiers:
• Account SIDs start with AC
• Message SIDs start with SM (SMS) or MM (MMS)
• Call SIDs start with CA
• Phone Number SIDs start with PN
• Application SIDs start with AP
• Queue SIDs start with QU
• POST is used for both creating and updating resources
• DELETE returns 204 No Content on success
• 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

Twilio error responses include:

{
  "code": 20404,
  "message": "The requested resource was not found",
  "more_info": "https://www.twilio.com/docs/errors/20404",
  "status": 404
}

Troubleshooting: Invalid API Key

When you receive an "Invalid API key" error, ALWAYS follow these steps before concluding there is an issue:

1. Check that the MATON_API_KEY environment variable is set:

echo $MATON_API_KEY

1. 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

Resources

• Twilio API Overview
• Messages API
• Calls API
• Phone Numbers API
• Applications API
• Usage Records API