# duoduo – Cal.com booking page

> I build AI tools that help creators turn ideas into visual content.

Photo to Video AI brings still photos to life with natural motion and cinematic camera effects, making it easy to create short videos for stories, products, and social media.

AI Picture Editor makes photo editing easier with AI. Retouch images, remove unwanted objects, replace backgrounds, and improve product photos using simple prompts.

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

## Event types

- [15 分钟会议](https://cal.com/duoduo/15min): 15 min, confirmed instantly, event type id 3460364. Details: https://cal.com/duoduo/15min.md
- [30 分钟会议](https://cal.com/duoduo/30min): 30 min, confirmed instantly, event type id 3460365. Details: https://cal.com/duoduo/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