# Collaborate with Shawn Ennis

> I believe the best opportunities don't come from decks and proposals — they come from conversations between the right people at the right time. Book this if you want to: Explore a partnership or channel opportunity Talk through a potential collaboration or referral Make an intro you think I should have Just catch up and see where things land I'm actively building and I'm always open to connecting with founders, operators, investors, and fellow builders who are moving fast. No pitch necessary. Just bring your curiosity.

- Host: Shawn Ennis
- Duration: 30 min
- Location: Link meeting, Google Meet
- Host time zone: America/Chicago
- Confirmation: The host confirms each booking; it stays pending until they accept it.
- Booking page: https://cal.com/shawn-ennis/collaborate
- Event type id: 5111105

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5111105&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": 5111105,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "title": "…",
    "attendeePhoneNumber": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `title` (What is this meeting about?)
- Optional fields: `attendeePhoneNumber` (Phone number), `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.
- `location` is optional; without it the booking uses the event’s first location.
- A successful response is a pending booking request.