# Free Intro Call with Seif @ UXBuilds with Seif Radwane

> We’ll discuss your MVP, product, or idea — and your goals and UX needs. You’ll see real examples from SaaS and mobile apps used by 160M+ users, and get a custom plan and quote. "We launched in days, not weeks." — James, Founder at PageJet ⚡ Spots are limited — book now! Questions? → hello@seifradwane.com

- Host: Seif Radwane
- Duration: 30 min
- Location: Google Meet
- Host time zone: Africa/Cairo
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/seifradwane/20min
- Event type id: 2074545

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=2074545&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": 2074545,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "stage": "…",
    "project": "…",
    "describe": "…",
    "budget": "…",
    "hear": "…",
    "title": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address), `stage` (What stage is your company at?), `project` (What are you looking to design?), `describe` (Briefly describe your product, goals, and challenges.), `budget` (Estimated budget?), `hear` (How did you hear about us?)
- Optional fields: `title` (Website or landing page? (Optional))
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.