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:

{
  "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

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&#x27;,
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&#x27;,
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

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_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
```
quo
```
. For example:

Correct:

https://gateway.maton.ai/quo/v1/phone-numbers

Incorrect:

https://gateway.maton.ai/openphone/v1/phone-numbers

Quo

AI Skill Market Insights

Be Part of the 0+ Developer Community

Quo

Quick Start

Base URL

Authentication

Getting Your API Key

Connection Management

List Connections

Create Connection

Get Connection

Delete Connection

Specifying Connection

API Reference

Phone Numbers

List Phone Numbers

Users

List Users

Get User by ID

Messages

Send Text Message

List Messages

Get Message by ID

Calls

List Calls

Get Call by ID

Get Call Recordings

Get Call Summary

Get Call Transcript

Get Call Voicemail

Contacts

List Contacts

Get Contact by ID

Create Contact

Update Contact

Delete Contact

Get Contact Custom Fields

Conversations

List Conversations

Pagination

Code Examples

JavaScript

Python

Send SMS Example

Notes

Error Handling

Troubleshooting: API Key Issues

Troubleshooting: Invalid App Name

Resources

Quick Start

Manual Installation

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