Quo

Access the Quo API with managed OAuth authentication. Send SMS messages, manage calls and contacts, and retrieve call recordings and transcripts.

Quick Start

# List phone numbers
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/quo/v1/phone-numbers')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('User-Agent', 'Maton/1.0')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Base URL

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

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

Authentication

All requests require the Maton API key in the Authorization header and a User-Agent header:

Authorization: Bearer $MATON_API_KEY
User-Agent: Maton/1.0

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 Quo 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=quo&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': 'quo'}).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": "quo",
    "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 Quo 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/quo/v1/phone-numbers')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
req.add_header('User-Agent', 'Maton/1.0')
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

Phone Numbers

List Phone Numbers

GET /quo/v1/phone-numbers

Optional query parameter:

• userId - Filter by user ID (pattern: ^US(.*)$)

Response:

{
  "data": [
    {
      "id": "PN123abc",
      "number": "+15555555555",
      "formattedNumber": "(555) 555-5555",
      "name": "Main Line",
      "users": [
        {
          "id": "US123abc",
          "email": "user@example.com",
          "firstName": "John",
          "lastName": "Doe",
          "role": "admin"
        }
      ],
      "createdAt": "2022-01-01T00:00:00Z",
      "updatedAt": "2022-01-01T00:00:00Z"
    }
  ]
}

Users

List Users

GET /quo/v1/users?maxResults=50

Query parameters:

• maxResults (required) - Results per page (1-50, default: 10)
• pageToken - Pagination token

Response:

{
  "data": [
    {
      "id": "US123abc",
      "email": "user@example.com",
      "firstName": "John",
      "lastName": "Doe",
      "role": "owner",
      "createdAt": "2022-01-01T00:00:00Z",
      "updatedAt": "2022-01-01T00:00:00Z"
    }
  ],
  "totalItems": 10,
  "nextPageToken": null
}

Get User by ID

GET /quo/v1/users/{userId}

Messages

Send Text Message

POST /quo/v1/messages
Content-Type: application/json

{
  "content": "Hello, world!",
  "from": "PN123abc",
  "to": ["+15555555555"]
}

Request body:

• content (required) - Message text (1-1600 characters)
• from (required) - Phone number ID (PN*) or E.164 format
• to (required) - Array with single recipient in E.164 format
• userId - User ID (defaults to phone owner)
• setInboxStatus - Set to "done" to mark conversation complete

Response (202):

{
  "id": "AC123abc",
  "to": ["+15555555555"],
  "from": "+15555555555",
  "text": "Hello, world!",
  "phoneNumberId": "PN123abc",
  "direction": "outgoing",
  "userId": "US123abc",
  "status": "queued",
  "createdAt": "2022-01-01T00:00:00Z",
  "updatedAt": "2022-01-01T00:00:00Z"
}

List Messages

GET /quo/v1/messages?phoneNumberId=PN123abc&participants[]=+15555555555&maxResults=100

Query parameters:

• phoneNumberId (required) - Phone number ID
• participants (required) - Array of participant phone numbers in E.164 format
• maxResults (required) - Results per page (1-100, default: 10)
• userId - Filter by user ID
• createdAfter - ISO 8601 timestamp
• createdBefore - ISO 8601 timestamp
• pageToken - Pagination token

Get Message by ID

GET /quo/v1/messages/{messageId}

Calls

List Calls

GET /quo/v1/calls?phoneNumberId=PN123abc&participants[]=+15555555555&maxResults=100

Query parameters:

• phoneNumberId (required) - Phone number ID
• participants (required) - Array with single participant phone number in E.164 format (max 1)
• maxResults (required) - Results per page (1-100, default: 10)
• userId - Filter by user ID
• createdAfter - ISO 8601 timestamp
• createdBefore - ISO 8601 timestamp
• pageToken - Pagination token

Response:

{
  "data": [
    {
      "id": "AC123abc",
      "phoneNumberId": "PN123abc",
      "userId": "US123abc",
      "direction": "incoming",
      "status": "completed",
      "duration": 120,
      "participants": ["+15555555555"],
      "answeredAt": "2022-01-01T00:00:00Z",
      "completedAt": "2022-01-01T00:02:00Z",
      "createdAt": "2022-01-01T00:00:00Z",
      "updatedAt": "2022-01-01T00:02:00Z"
    }
  ],
  "totalItems": 50,
  "nextPageToken": "..."
}

Get Call by ID

GET /quo/v1/calls/{callId}

Get Call Recordings

GET /quo/v1/call-recordings/{callId}

Response:

{
  "data": [
    {
      "id": "REC123abc",
      "duration": 120,
      "startTime": "2022-01-01T00:00:00Z",
      "status": "completed",
      "type": "voicemail",
      "url": "https://..."
    }
  ]
}

Recording status values: absent, completed, deleted, failed, in-progress, paused, processing, stopped, stopping

Get Call Summary

GET /quo/v1/call-summaries/{callId}

Get Call Transcript

GET /quo/v1/call-transcripts/{callId}

Get Call Voicemail

GET /quo/v1/call-voicemails/{callId}

Contacts

List Contacts

GET /quo/v1/contacts?maxResults=50

Query parameters:

• maxResults (required) - Results per page (1-50, default: 10)
• externalIds - Array of external identifiers
• sources - Array of source indicators
• pageToken - Pagination token

Response:

{
  "data": [
    {
      "id": "CT123abc",
      "externalId": null,
      "source": null,
      "defaultFields": {
        "company": "Acme Corp",
        "firstName": "Jane",
        "lastName": "Doe",
        "role": "Manager",
        "emails": [{"name": "work", "value": "jane@example.com", "id": "EM1"}],
        "phoneNumbers": [{"name": "mobile", "value": "+15555555555", "id": "PH1"}]
      },
      "customFields": [],
      "createdAt": "2022-01-01T00:00:00Z",
      "updatedAt": "2022-01-01T00:00:00Z",
      "createdByUserId": "US123abc"
    }
  ],
  "totalItems": 100,
  "nextPageToken": "..."
}

Get Contact by ID

GET /quo/v1/contacts/{contactId}

Create Contact

POST /quo/v1/contacts
Content-Type: application/json

{
  "defaultFields": {
    "firstName": "Jane",
    "lastName": "Doe",
    "company": "Acme Corp",
    "phoneNumbers": [{"name": "mobile", "value": "+15555555555"}],
    "emails": [{"name": "work", "value": "jane@example.com"}]
  }
}

Update Contact

PATCH /quo/v1/contacts/{contactId}
Content-Type: application/json

{
  "defaultFields": {
    "company": "New Company"
  }
}

Delete Contact

DELETE /quo/v1/contacts/{contactId}

Get Contact Custom Fields

GET /quo/v1/contact-custom-fields

Conversations

List Conversations

GET /quo/v1/conversations?maxResults=100

Query parameters:

• maxResults (required) - Results per page (1-100, default: 10)
• phoneNumbers - Array of phone number IDs or E.164 numbers (1-100 items)
• userId - Filter by user ID
• createdAfter - ISO 8601 timestamp
• createdBefore - ISO 8601 timestamp
• updatedAfter - ISO 8601 timestamp
• updatedBefore - ISO 8601 timestamp
• excludeInactive - Boolean to exclude inactive conversations
• pageToken - Pagination token

Response:

{
  "data": [
    {
      "id": "CV123abc",
      "phoneNumberId": "PN123abc",
      "name": "Jane Doe",
      "participants": ["+15555555555"],
      "assignedTo": "US123abc",
      "lastActivityAt": "2022-01-01T00:00:00Z",
      "createdAt": "2022-01-01T00:00:00Z",
      "updatedAt": "2022-01-01T00:00:00Z"
    }
  ],
  "totalItems": 50,
  "nextPageToken": "..."
}

Pagination

Quo uses token-based pagination. Include maxResults to set page size and use pageToken to retrieve subsequent pages.

GET /quo/v1/contacts?maxResults=50&pageToken=eyJsYXN0SWQiOi...

Response includes pagination info:

{
  "data": [...],
  "totalItems": 150,
  "nextPageToken": "eyJsYXN0SWQiOi..."
}

When nextPageToken is null, you've reached the last page.

Code Examples

JavaScript

const response = await fetch(
  'https://gateway.maton.ai/quo/v1/phone-numbers',
  {
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`,
      'User-Agent': 'Maton/1.0'
    }
  }
);
const data = await response.json();

Python

import os
import requests

response = requests.get(
    'https://gateway.maton.ai/quo/v1/phone-numbers',
    headers={
        'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}',
        'User-Agent': 'Maton/1.0'
    }
)
data = response.json()

Send SMS Example

import os
import requests

response = requests.post(
    'https://gateway.maton.ai/quo/v1/messages',
    headers={
        'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}',
        'User-Agent': 'Maton/1.0',
        'Content-Type': 'application/json'
    },
    json={
        'content': 'Hello from Quo!',
        'from': 'PN123abc',
        'to': ['+15555555555']
    }
)
data = response.json()

Notes

• Phone number IDs start with PN
• User IDs start with US
• Call/Message IDs start with AC
• Phone numbers must be in E.164 format (e.g., +15555555555)
• SMS pricing: $0.01 per segment (US/Canada); international rates apply
• Maximum 1600 characters per message
• List calls requires exactly 1 participant (1:1 conversations only)
• IMPORTANT: All API requests require a User-Agent header (e.g., User-Agent: Maton/1.0). Requests without this header will be blocked.
• IMPORTANT: When using curl commands, use curl -g when URLs contain brackets (participants[]) 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

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://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

Resources

• Quo API Introduction
• Quo API Authentication
• Quo Support Center