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 A quick 30-minute catch-up call",
      "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

| Status | Meaning | |--------|---------| | 400 | Bad request or missing Calendly connection | | 401 | Invalid or missing Maton API key | | 403 | Forbidden - insufficient permissions or plan restrictions | | 404 | Resource not found | | 424 | External calendar error (calendar integration issue on Calendly side) | | 429 | Rate limited | | 4xx/5xx | Passthrough error from Calendly API |

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

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

…

## Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [Kernel8901](https://github.com/Kernel8901)
- **Source:** [Kernel8901/ai-agent-skills-classification](https://github.com/Kernel8901/ai-agent-skills-classification)
- **License:** MIT

Install and usage instructions live in the source repository linked above.