# Free STI/HIV Testing with Metro Trans Umbrella Group

> The St. Louis City Department of Health offers free STI and HIV testing at MTUG's community center on the 1st and 3rd Wednesdays of the month. Appointments are highly encouraged to secure a spot.

- Host: Metro Trans Umbrella Group
- Duration: 30 min
- Location: In Person (Organizer Address)
- Host time zone: America/Chicago
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/stlmetrotrans/free-testing
- Event type id: 4434200

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=4434200&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": 4434200,
  "start": "<UTC ISO 8601 start from the slots response>",
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "bookingFieldsResponses": {
    "attendeePhoneNumber": "…",
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `attendeePhoneNumber` (Phone number), `notes` (Additional notes)
- `name` and `email` go in `attendee` and `guests` is a list of emails; every other field goes in `bookingFieldsResponses` under its name.