# Waynoir – Cal.com booking page

> Waynoir is a retention research institute that works directly with D2C brands.


We study customer behavior, train machine learning models on campaign data, and publish our findings. The same research that goes into our publications is what drives every email and SMS system we build for clients.


This call is 20 minutes. We'll look at your retention, identify where revenue is leaking, and tell you honestly whether we're the right fit to fix it.

Book a time that works for you.

Booking page: https://cal.com/waynoir

## Event types

- [15 Min Meeting](https://cal.com/waynoir/15min): 15 min, confirmed instantly, event type id 2562794. Details: https://cal.com/waynoir/15min.md
- [30 Min Meeting](https://cal.com/waynoir/30min): 30 min, confirmed instantly, event type id 2562795. Details: https://cal.com/waynoir/30min.md

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=<event type id>&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

Each event type's `.md` document lists its required booking fields and the `POST https://api.cal.com/v2/bookings` request (`cal-api-version: 2026-02-25`).

## More

- API docs: https://cal.com/docs/api-reference/v2/introduction