Cal.com

Access the Cal.com API with managed OAuth authentication. Create and manage event types, bookings, schedules, calendars, and webhooks.

Quick Start

# Get your profile
python3 <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/cal-com/v2/me')
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/cal-com/v2/{resource}

Maton proxies requests to api.cal.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

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

Connection Management (Maton Platform)

The following endpoints are Maton platform operations for managing the OAuth connection to Cal.com — they are not part of the Cal.com API itself. Only the endpoints listed in the API Reference section below are proxied to Cal.com.

List Connections

python3 <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/connections?app=cal-com&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

python3 <<'EOF'
import urllib.request, os, json
data = json.dumps({'app': 'cal-com'}).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

python3 <<'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": "2026-02-12T22:52:17.140998Z",
    "last_updated_time": "2026-02-12T22:55:20.376189Z",
    "url": "https://connect.maton.ai/?session_token=...",
    "app": "cal-com",
    "metadata": {}
  }
}

Open the returned url in a browser to complete OAuth authorization.

Delete Connection

python3 <<'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 Cal.com connections, specify which one to use with the Maton-Connection header:

python3 <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://api.maton.ai/cal-com/v2/me')
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 event types, bookings, schedules, availability, calendars, conferencing, webhooks, teams, verified resources, and user profile within the connected Cal.com 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.
• Webhooks send data to external URLs. Creating a webhook causes future booking/event data (including attendee emails and names) to be transmitted to the specified subscriber URL. Confirm the URL and triggers with the user before creating.
• Bookings contain personal data. Listing bookings may expose attendee identities, email addresses, and schedule details. Only retrieve when explicitly requested.

API Reference

User Profile

Get Profile

GET /cal-com/v2/me

Response:

{
  "status": "success",
  "data": {
    "id": 2152180,
    "email": "user@example.com",
    "name": "User Name",
    "avatarUrl": "https://...",
    "bio": "",
    "timeFormat": 12,
    "defaultScheduleId": null,
    "weekStart": "Sunday",
    "timeZone": "America/New_York"
  }
}

Update Profile

PATCH /cal-com/v2/me
Content-Type: application/json

{
  "bio": "Updated bio",
  "name": "New Name"
}

Event Types

List Event Types

GET /cal-com/v2/event-types

With username filter:

GET /cal-com/v2/event-types?username={username}

Response:

{
  "status": "success",
  "data": {
    "eventTypeGroups": [
      {
        "teamId": null,
        "bookerUrl": "https://cal.com",
        "profile": {
          "slug": "username",
          "name": "User Name"
        },
        "eventTypes": [
          {
            "id": 4716831,
            "title": "30 min meeting",
            "slug": "30min",
            "length": 30,
            "hidden": false
          }
        ]
      }
    ]
  }
}

Get Event Type

GET /cal-com/v2/event-types/{eventTypeId}

Create Event Type

POST /cal-com/v2/event-types
Content-Type: application/json

{
  "title": "Meeting",
  "slug": "meeting",
  "length": 30
}

Required fields:

• title - Event type name
• slug - URL slug (must be unique)
• length - Duration in minutes

Response:

{
  "status": "success",
  "data": {
    "id": 4745911,
    "title": "Meeting",
    "slug": "meeting",
    "length": 30,
    "locations": [{"type": "integrations:daily"}],
    "hidden": false,
    "userId": 2152180
  }
}

Update Event Type

PATCH /cal-com/v2/event-types/{eventTypeId}
Content-Type: application/json

{
  "title": "Updated Meeting Title",
  "description": "Updated description"
}

Delete Event Type

DELETE /cal-com/v2/event-types/{eventTypeId}

Event Type Webhooks

> Data transmission. Webhooks send booking and event data (attendee emails, names, schedule details) to the specified external subscriber URL. Confirm the URL, triggers, and intent with the user before creating or updating webhooks.

List Webhooks

GET /cal-com/v2/event-types/{eventTypeId}/webhooks

Create Webhook

POST /cal-com/v2/event-types/{eventTypeId}/webhooks
Content-Type: application/json

{
  "subscriberUrl": "https://example.com/webhook",
  "triggers": ["BOOKING_CREATED"],
  "active": true
}

Available triggers: BOOKING_CREATED, BOOKING_RESCHEDULED, BOOKING_CANCELLED, BOOKING_CONFIRMED, BOOKING_REJECTED, BOOKING_REQUESTED, BOOKING_PAYMENT_INITIATED, BOOKING_NO_SHOW_UPDATED, MEETING_ENDED, MEETING_STARTED, RECORDING_READY, INSTANT_MEETING, RECORDING_TRANSCRIPTION_GENERATED

Get Webhook

GET /cal-com/v2/event-types/{eventTypeId}/webhooks/{webhookId}

Update Webhook

PATCH /cal-com/v2/event-types/{eventTypeId}/webhooks/{webhookId}
Content-Type: application/json

{
  "active": false
}

Delete Webhook

DELETE /cal-com/v2/event-types/{eventTypeId}/webhooks/{webhookId}

Bookings

List Bookings

GET /cal-com/v2/bookings

With filters:

GET /cal-com/v2/bookings?status=upcoming
GET /cal-com/v2/bookings?status=past
GET /cal-com/v2/bookings?status=cancelled
GET /cal-com/v2/bookings?status=accepted
GET /cal-com/v2/bookings?take=10

Response:

{
  "status": "success",
  "data": {
    "bookings": [
      {
        "id": 15893969,
        "uid": "gZJNR7FQG2qLsBqnFdxAPE",
        "title": "30 min meeting between User and Guest",
        "startTime": "2026-02-13T17:00:00.000Z",
        "endTime": "2026-02-13T17:30:00.000Z",
        "status": "ACCEPTED"
      }
    ],
    "totalCount": 1,
    "nextCursor": null
  }
}

Get Booking

GET /cal-com/v2/bookings/{bookingUid}

Create Booking

POST /cal-com/v2/bookings
Content-Type: application/json

{
  "eventTypeId": 4716831,
  "start": "2026-02-13T17:00:00Z",
  "timeZone": "America/New_York",
  "language": "en",
  "responses": {
    "name": "Guest Name",
    "email": "guest@example.com"
  },
  "metadata": {}
}

Required fields:

• eventTypeId - ID of the event type
• start - Start time in ISO 8601 format (must be an available slot)
• timeZone - Valid IANA timezone
• language - Language code (e.g., "en")
• responses.name - Attendee name
• responses.email - Attendee email

Response:

{
  "status": "success",
  "data": {
    "id": 15893969,
    "uid": "gZJNR7FQG2qLsBqnFdxAPE",
    "title": "30 min meeting between User and Guest Name",
    "startTime": "2026-02-13T17:00:00.000Z",
    "endTime": "2026-02-13T17:30:00.000Z",
    "status": "ACCEPTED",
    "location": "integrations:daily"
  }
}

Cancel Booking

POST /cal-com/v2/bookings/{bookingUid}/cancel
Content-Type: application/json

{
  "cancellationReason": "Reason for cancellation"
}

Schedules

Get Default Schedule

GET /cal-com/v2/schedules/default

Get Schedule

GET /cal-com/v2/schedules/{scheduleId}

Create Schedule

POST /cal-com/v2/schedules
Content-Type: application/json

{
  "name": "Work Hours",
  "timeZone": "America/New_York",
  "isDefault": false
}

Response:

{
  "status": "success",
  "data": {
    "id": 1243030,
    "name": "Work Hours",
    "isManaged": false,
    "workingHours": [
      {
        "days": [1, 2, 3, 4, 5],
        "startTime": 540,
        "endTime": 1020
      }
    ]
  }
}

Update Schedule

PATCH /cal-com/v2/schedules/{scheduleId}
Content-Type: application/json

{
  "name": "Updated Schedule Name"
}

Delete Schedule

DELETE /cal-com/v2/schedules/{scheduleId}

Availability Slots

Get Available Slots

GET /cal-com/v2/slots/available?eventTypeId={eventTypeId}&startTime={startTime}&endTime={endTime}

Parameters:

• eventTypeId - Required. The event type ID
• startTime - Required. Start of range (ISO 8601)
• endTime - Required. End of range (ISO 8601)

Response:

{
  "status": "success",
  "data": {
    "slots": {
      "2026-02-13": [
        {"time": "2026-02-13T17:00:00.000Z"},
        {"time": "2026-02-13T17:30:00.000Z"},
        {"time": "2026-02-13T18:00:00.000Z"}
      ],
      "2026-02-14": [
        {"time": "2026-02-14T14:00:00.000Z"}
      ]
    }
  }
}

Reserve Slot

POST /cal-com/v2/slots/reserve
Content-Type: application/json

{
  "eventTypeId": 4716831,
  "slotUtcStartDate": "2026-02-20T14:00:00Z",
  "slotUtcEndDate": "2026-02-20T14:30:00Z"
}

Response:

{
  "status": "success",
  "data": "968ed924-83fb-4da7-969e-eaa621643535"
}

Calendars

List Connected Calendars

GET /cal-com/v2/calendars

Response:

{
  "status": "success",
  "data": {
    "connectedCalendars": [
      {
        "integration": {
          "name": "Google Calendar",
          "type": "google_calendar"
        },
        "calendars": [...]
      }
    ]
  }
}

Conferencing

List Conferencing Apps

GET /cal-com/v2/conferencing

Response:

{
  "status": "success",
  "data": [
    {
      "id": 1769268,
      "type": "google_video",
      "appId": "google-meet"
    }
  ]
}

Get Default Conferencing App

GET /cal-com/v2/conferencing/default

Webhooks (User-level)

List Webhooks

GET /cal-com/v2/webhooks

Create Webhook

POST /cal-com/v2/webhooks
Content-Type: application/json

{
  "subscriberUrl": "https://example.com/webhook",
  "triggers": ["BOOKING_CREATED"],
  "active": true
}

Get Webhook

GET /cal-com/v2/webhooks/{webhookId}

Update Webhook

PATCH /cal-com/v2/webhooks/{webhookId}
Content-Type: application/json

{
  "active": false
}

Delete Webhook

DELETE /cal-com/v2/webhooks/{webhookId}

Teams

List Teams

GET /cal-com/v2/teams

Verified Resources

List Verified Emails

GET /cal-com/v2/verified-resources/emails

Pagination

Bookings use cursor-based pagination with take and nextCursor:

GET /cal-com/v2/bookings?take=10

Response includes pagination info:

{
  "data": {
    "bookings": [...],
    "totalCount": 25,
    "nextCursor": "abc123"
  }
}

For next page:

GET /cal-com/v2/bookings?take=10&cursor=abc123

Code Examples

JavaScript

const response = await fetch(
  'https://api.maton.ai/cal-com/v2/event-types',
  {
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`
    }
  }
);
const data = await response.json();

Python

import os
import requests

response = requests.get(
    'https://api.maton.ai/cal-com/v2/event-types',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'}
)
data = response.json()

Notes

• All times are in UTC unless a timezone is specified
• length field in event types is in minutes
• Booking creation requires an available slot - check /v2/slots/available first
• Schedule working hours use minutes from midnight (540 = 9:00 AM, 1020 = 5:00 PM)
• Days in schedules: 0 = Sunday, 1 = Monday, ... 6 = Saturday
• The GET /v2/schedules endpoint may return 500 errors; use GET /v2/schedules/{id} instead
• 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

Troubleshooting: API Key Issues

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:

python3 <<'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

Troubleshooting: Invalid App Name

1. Ensure your URL path starts with cal-com. For example:

• Correct: https://api.maton.ai/cal-com/v2/me
• Incorrect: https://api.maton.ai/v2/me

Troubleshooting: Booking Creation Fails

1. Check available slots before creating a booking:

GET /cal-com/v2/slots/available?eventTypeId={id}&startTime=...&endTime=...

1. Ensure all required fields are provided:
• eventTypeId
• start (must match an available slot)
• timeZone
• language
• responses.name
• responses.email

Resources

• Cal.com API Documentation
• Cal.com API Reference
• Maton Community
• Maton Support