Calendly

Calendly

Access the Calendly API with managed OAuth authentication. Retrieve event types, scheduled events, invitees, availability data, and manage webhook subscriptions for scheduling automation.

Quick Start

# Get current user
python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/users/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://gateway.maton.ai/calendly/{native-api-path}

Replace {native-api-path} with the actual Calendly API endpoint path. The gateway proxies requests to api.calendly.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

Manage your Calendly 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=calendly&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': 'calendly'}).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": "calendly",
    "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 Calendly 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/calendly/users/me')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
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

Users

Get Current User

GET /calendly/users/me

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/users/me')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "resource": {
    "uri": "https://api.calendly.com/users/AAAAAAAAAAAAAAAA",
    "name": "Alice Johnson",
    "slug": "alice-johnson",
    "email": "alice.johnson@acme.com",
    "scheduling_url": "https://calendly.com/alice-johnson",
    "timezone": "America/New_York",
    "avatar_url": "https://example.com/avatar.png",
    "created_at": "2024-01-15T10:30:00.000000Z",
    "updated_at": "2025-06-20T14:45:00.000000Z",
    "current_organization": "https://api.calendly.com/organizations/BBBBBBBBBBBBBBBB"
  }
}

Get a User

GET /calendly/users/{uuid}

Event Types

List Event Types

GET /calendly/event_types

Query parameters:

• user - User URI to filter event types
• organization - Organization URI to filter event types
• active - Filter by active status (true/false)
• count - Number of results to return (default 20, max 100)
• page_token - Token for pagination
• sort - Sort order (e.g., name:asc, created_at:desc)

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/event_types?user=https://api.calendly.com/users/AAAAAAAAAAAAAAAA&active=true')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "collection": [
    {
      "uri": "https://api.calendly.com/event_types/CCCCCCCCCCCCCCCC",
      "name": "30 Minute Meeting",
      "active": true,
      "slug": "30min",
      "scheduling_url": "https://calendly.com/alice-johnson/30min",
      "duration": 30,
      "kind": "solo",
      "type": "StandardEventType",
      "color": "#0066FF",
      "created_at": "2024-02-01T09:00:00.000000Z",
      "updated_at": "2025-05-15T11:30:00.000000Z",
      "description_plain": "A quick 30-minute catch-up call",
      "description_html": "<p>A quick 30-minute catch-up call</p>",
      "profile": {
        "type": "User",
        "name": "Alice Johnson",
        "owner": "https://api.calendly.com/users/AAAAAAAAAAAAAAAA"
      }
    }
  ],
  "pagination": {
    "count": 1,
    "next_page_token": null
  }
}

Get an Event Type

GET /calendly/event_types/{uuid}

Scheduled Events

List Scheduled Events

GET /calendly/scheduled_events

Query parameters:

• user - User URI to filter events
• organization - Organization URI to filter events
• invitee_email - Filter by invitee email
• status - Filter by status (active, canceled)
• min_start_time - Filter events starting after this time (ISO 8601)
• max_start_time - Filter events starting before this time (ISO 8601)
• count - Number of results (default 20, max 100)
• page_token - Token for pagination
• sort - Sort order (e.g., start_time:asc)

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/scheduled_events?user=https://api.calendly.com/users/AAAAAAAAAAAAAAAA&status=active&min_start_time=2025-03-01T00:00:00Z')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "collection": [
    {
      "uri": "https://api.calendly.com/scheduled_events/DDDDDDDDDDDDDDDD",
      "name": "30 Minute Meeting",
      "status": "active",
      "start_time": "2025-03-15T14:00:00.000000Z",
      "end_time": "2025-03-15T14:30:00.000000Z",
      "event_type": "https://api.calendly.com/event_types/CCCCCCCCCCCCCCCC",
      "location": {
        "type": "zoom",
        "join_url": "https://zoom.us/j/123456789"
      },
      "invitees_counter": {
        "total": 1,
        "active": 1,
        "limit": 1
      },
      "created_at": "2025-03-10T09:15:00.000000Z",
      "updated_at": "2025-03-10T09:15:00.000000Z",
      "event_memberships": [
        {
          "user": "https://api.calendly.com/users/AAAAAAAAAAAAAAAA"
        }
      ]
    }
  ],
  "pagination": {
    "count": 1,
    "next_page_token": null
  }
}

Get a Scheduled Event

GET /calendly/scheduled_events/{uuid}

Cancel a Scheduled Event

POST /calendly/scheduled_events/{uuid}/cancellation
Content-Type: application/json

{
  "reason": "Meeting rescheduled"
}

Example:

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'reason': 'Meeting rescheduled'}).encode()
req = urllib.request.Request('https://gateway.maton.ai/calendly/scheduled_events/DDDDDDDDDDDDDDDD/cancellation', 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

Invitees

List Event Invitees

GET /calendly/scheduled_events/{event_uuid}/invitees

Query parameters:

• status - Filter by status (active, canceled)
• email - Filter by invitee email
• count - Number of results (default 20, max 100)
• page_token - Token for pagination
• sort - Sort order (e.g., created_at:asc)

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/scheduled_events/DDDDDDDDDDDDDDDD/invitees')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "collection": [
    {
      "uri": "https://api.calendly.com/scheduled_events/DDDDDDDDDDDDDDDD/invitees/EEEEEEEEEEEEEEEE",
      "email": "bob.smith@example.com",
      "name": "Bob Smith",
      "status": "active",
      "timezone": "America/Los_Angeles",
      "event": "https://api.calendly.com/scheduled_events/DDDDDDDDDDDDDDDD",
      "created_at": "2025-03-10T09:15:00.000000Z",
      "updated_at": "2025-03-10T09:15:00.000000Z",
      "questions_and_answers": [
        {
          "question": "What would you like to discuss?",
          "answer": "Project timeline review",
          "position": 0
        }
      ],
      "tracking": {
        "utm_source": null,
        "utm_medium": null,
        "utm_campaign": null
      },
      "cancel_url": "https://calendly.com/cancellations/EEEEEEEEEEEEEEEE",
      "reschedule_url": "https://calendly.com/reschedulings/EEEEEEEEEEEEEEEE"
    }
  ],
  "pagination": {
    "count": 1,
    "next_page_token": null
  }
}

Get an Invitee

GET /calendly/scheduled_events/{event_uuid}/invitees/{invitee_uuid}

Create Event Invitee (Scheduling API)

Schedule a meeting programmatically by creating an invitee. Requires a paid Calendly plan.

POST /calendly/event_types/{event_type_uuid}/invitees
Content-Type: application/json

{
  "start_time": "2025-03-20T15:00:00Z",
  "email": "bob.smith@example.com",
  "name": "Bob Smith",
  "timezone": "America/Los_Angeles",
  "location": {
    "kind": "zoom"
  },
  "questions_and_answers": [
    {
      "question_uuid": "QQQQQQQQQQQQQQQ",
      "answer": "Project timeline review"
    }
  ]
}

Example:

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'start_time': '2025-03-20T15:00:00Z', 'email': 'bob.smith@example.com', 'name': 'Bob Smith'}).encode()
req = urllib.request.Request('https://gateway.maton.ai/calendly/event_types/CCCCCCCCCCCCCCCC/invitees', 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

Note: The start_time must correspond to a valid available slot. Use the /event_type_available_times endpoint to find available times.

Availability

Get Event Type Available Times

GET /calendly/event_type_available_times

Query parameters:

• event_type - Event type URI (required)
• start_time - Start of time range (ISO 8601, required)
• end_time - End of time range (ISO 8601, required, max 7 days from start)

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/event_type_available_times?event_type=https://api.calendly.com/event_types/CCCCCCCCCCCCCCCC&start_time=2025-03-15T00:00:00Z&end_time=2025-03-22T00:00:00Z')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "collection": [
    {
      "status": "available",
      "invitees_remaining": 1,
      "start_time": "2025-03-17T14:00:00.000000Z",
      "scheduling_url": "https://calendly.com/alice-johnson/30min/2025-03-17T14:00:00Z"
    },
    {
      "status": "available",
      "invitees_remaining": 1,
      "start_time": "2025-03-17T14:30:00.000000Z",
      "scheduling_url": "https://calendly.com/alice-johnson/30min/2025-03-17T14:30:00Z"
    }
  ]
}

Get User Busy Times

GET /calendly/user_busy_times

Query parameters:

• user - User URI (required)
• start_time - Start of time range (ISO 8601, required)
• end_time - End of time range (ISO 8601, required, max 7 days from start)

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/user_busy_times?user=https://api.calendly.com/users/AAAAAAAAAAAAAAAA&start_time=2025-03-15T00:00:00Z&end_time=2025-03-22T00:00:00Z')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "collection": [
    {
      "type": "calendly",
      "start_time": "2025-03-17T10:00:00.000000Z",
      "end_time": "2025-03-17T11:00:00.000000Z"
    },
    {
      "type": "external",
      "start_time": "2025-03-18T14:00:00.000000Z",
      "end_time": "2025-03-18T15:00:00.000000Z"
    }
  ]
}

Get User Availability Schedules

GET /calendly/user_availability_schedules

Query parameters:

• user - User URI (required)

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/user_availability_schedules?user=https://api.calendly.com/users/AAAAAAAAAAAAAAAA')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Organization

List Organization Memberships

GET /calendly/organization_memberships

Query parameters:

• organization - Organization URI (required)
• user - User URI to filter
• email - Email to filter
• count - Number of results (default 20, max 100)
• page_token - Token for pagination

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/organization_memberships?organization=https://api.calendly.com/organizations/BBBBBBBBBBBBBBBB')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Response:

{
  "collection": [
    {
      "uri": "https://api.calendly.com/organization_memberships/FFFFFFFFFFFFFFFF",
      "role": "admin",
      "user": {
        "uri": "https://api.calendly.com/users/AAAAAAAAAAAAAAAA",
        "name": "Alice Johnson",
        "email": "alice.johnson@acme.com"
      },
      "organization": "https://api.calendly.com/organizations/BBBBBBBBBBBBBBBB",
      "created_at": "2024-01-15T10:30:00.000000Z",
      "updated_at": "2025-06-20T14:45:00.000000Z"
    }
  ],
  "pagination": {
    "count": 1,
    "next_page_token": null
  }
}

Webhooks

Webhooks require a paid Calendly plan (Standard, Teams, or Enterprise).

List Webhook Subscriptions

GET /calendly/webhook_subscriptions

Query parameters:

• organization - Organization URI (required)
• scope - Filter by scope (user, organization)
• user - User URI to filter (when scope is user)
• count - Number of results (default 20, max 100)
• page_token - Token for pagination

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/webhook_subscriptions?organization=https://api.calendly.com/organizations/BBBBBBBBBBBBBBBB&scope=organization')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Create Webhook Subscription

POST /calendly/webhook_subscriptions
Content-Type: application/json

{
  "url": "https://example.com/webhook",
  "events": ["invitee.created", "invitee.canceled"],
  "organization": "https://api.calendly.com/organizations/BBBBBBBBBBBBBBBB",
  "scope": "organization",
  "signing_key": "your-secret-key"
}

Available events:

• invitee.created - Triggered when an invitee schedules an event
• invitee.canceled - Triggered when an invitee cancels an event
• routing_form_submission.created - Triggered when a routing form is submitted

Example:

python <<'EOF'
import urllib.request, os, json
data = json.dumps({'url': 'https://example.com/webhook', 'events': ['invitee.created', 'invitee.canceled'], 'organization': 'https://api.calendly.com/organizations/BBBBBBBBBBBBBBBB', 'scope': 'organization'}).encode()
req = urllib.request.Request('https://gateway.maton.ai/calendly/webhook_subscriptions', 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

Response:

{
  "resource": {
    "uri": "https://api.calendly.com/webhook_subscriptions/GGGGGGGGGGGGGGGG",
    "callback_url": "https://example.com/webhook",
    "created_at": "2025-03-01T12:00:00.000000Z",
    "updated_at": "2025-03-01T12:00:00.000000Z",
    "retry_started_at": null,
    "state": "active",
    "events": ["invitee.created", "invitee.canceled"],
    "scope": "organization",
    "organization": "https://api.calendly.com/organizations/BBBBBBBBBBBBBBBB",
    "user": null,
    "creator": "https://api.calendly.com/users/AAAAAAAAAAAAAAAA"
  }
}

Get a Webhook Subscription

GET /calendly/webhook_subscriptions/{uuid}

Delete a Webhook Subscription

DELETE /calendly/webhook_subscriptions/{uuid}

Example:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/webhook_subscriptions/GGGGGGGGGGGGGGGG', 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

Returns 204 No Content on success.

Pagination

Use page_token for pagination. Response includes pagination.next_page_token when more results exist:

python <<'EOF'
import urllib.request, os, json
req = urllib.request.Request('https://gateway.maton.ai/calendly/scheduled_events?user=USER_URI&page_token=NEXT_PAGE_TOKEN')
req.add_header('Authorization', f'Bearer {os.environ["MATON_API_KEY"]}')
print(json.dumps(json.load(urllib.request.urlopen(req)), indent=2))
EOF

Code Examples

JavaScript

const response = await fetch(
  'https://gateway.maton.ai/calendly/scheduled_events?user=https://api.calendly.com/users/AAAAAAAAAAAAAAAA&status=active',
  {
    headers: {
      'Authorization': `Bearer ${process.env.MATON_API_KEY}`
    }
  }
);
const data = await response.json();

Python

import os
import requests

response = requests.get(
    'https://gateway.maton.ai/calendly/scheduled_events',
    headers={'Authorization': f'Bearer {os.environ["MATON_API_KEY"]}'},
    params={
        'user': 'https://api.calendly.com/users/AAAAAAAAAAAAAAAA',
        'status': 'active'
    }
)
data = response.json()

Notes

• Resource identifiers are URIs (e.g., https://api.calendly.com/users/AAAAAAAAAAAAAAAA)
• Timestamps are in ISO 8601 format
• The Scheduling API (Create Event Invitee) requires a paid Calendly plan
• Webhooks are not available on Calendly's free plan
• Availability endpoints have a 7-day maximum range per request and start_time must be in the future
• The API does not support creating or managing event types programmatically
• IMPORTANT: When piping curl output to jq or other commands, environment variables like $MATON_API_KEY may not expand correctly in some shell environments. You may get "Invalid API key" errors when piping.

Error Handling

Troubleshooting: Invalid API Key

When you receive a "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

2. 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

• Calendly Developer Portal
• API Reference
• API Use Cases