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
- Sign in or create an account at maton.ai
- Go to maton.ai/settings
- 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:
json
{
"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:
json
{
"data": [
{
"id": "PN123abc",
"number": "+15555555555",
"formattedNumber": "(555) 555-5555",
"name": "Main Line",
"users": [
{
"id": "US123abc",
"email": "[email protected]",
"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:
json
{
"data": [
{
"id": "US123abc",
"email": "[email protected]",
"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):
json
{
"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:
json
{
"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:
json
{
"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:
json
{
"data": [
{
"id": "CT123abc",
"externalId": null,
"source": null,
"defaultFields": {
"company": "Acme Corp",
"firstName": "Jane",
"lastName": "Doe",
"role": "Manager",
"emails": [{"name": "work", "value": "[email protected]", "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": "[email protected]"}]
}
}
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:
json
{
"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: $0.01 per segment (US/Canada); international rates apply
- Maximum 1600 characters per message
- List calls requires exactly 1 participant (1:1 conversations only)
- IMPORTANT: All API requests require a
User-Agentheader (e.g.,User-Agent: Maton/1.0). Requests without this header will be blocked. - IMPORTANT: When using curl commands, use
curl -gwhen URLs contain brackets (participants[]) to disable glob parsing - IMPORTANT: When piping curl output to
jqor other commands, environment variables like$MATON_API_KEYmay not expand correctly in some shell environments
Error Handling
| Status | Meaning |
|---|---|
| 400 | Bad request (e.g., too many participants, invalid format) |
| 401 | Invalid or missing Maton API key |
| 402 | Insufficient credits for SMS |
| 403 | Not authorized for this phone number |
| 404 | Resource not found |
| 429 | Rate limited |
| 500 | Server error |
Troubleshooting: API Key Issues
- Check that the
MATON_API_KEYenvironment 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
quo. For example:
- Correct:
https://gateway.maton.ai/quo/v1/phone-numbers - Incorrect:
https://gateway.maton.ai/openphone/v1/phone-numbers