# Partnerships & Collaborations (For Affiliates, Agencies, Influencers & Integrations) with Cédric van Ravesteijn

> Are you an agency, influencer, SaaS founder, or business looking to collaborate with Cal.com? Let’s chat! In this call, we’ll explore how we can work together—whether through our affiliate program, co-marketing, integrations, or other strategic partnerships.

- Host: Cédric van Ravesteijn
- Duration: 15, 30 min
- Location: Cal Video
- Host time zone: Europe/Amsterdam
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://i.cal.com/cedric/partnerships-collaborations
- Event type id: 1953130

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=1953130&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone=<IANA time zone>
cal-api-version: 2024-09-04
```

The response is `{"data":{"YYYY-MM-DD":[{"start":"<ISO 8601 with offset>"}]}}`; no API key is needed.

## Book

```http
POST https://api.cal.com/v2/bookings
cal-api-version: 2026-02-25
Content-Type: application/json

{
  "eventTypeId": 1953130,
  "start": "<UTC ISO 8601 start from the slots response>",
  "lengthInMinutes": 15,
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `notes` (Additional notes), `guests` (Add guests)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.
- `lengthInMinutes` picks one of 15, 30; pass the same value to the slots request as `duration`.