# grantmaking.ai Funder Intro Call with Matt Brooks

> Thanks for your interest! grantmaking.ai is public funding infrastructure for AI safety: a database of funding opportunities with a trust and signal layer on top. Things we can chat about: Walk you through what we're building and where it's headed Share details on the upcoming grant round and how funders can participate Understand what you're looking for — whether that's better deal flow, a way to run your own round, or just a faster way to explore the AI safety landscape Feel free to send over docs / links before our call if you want us to understand some context.

- Host: Matt Brooks
- Duration: 25, 45, 60 min
- Location: Google Meet
- Host time zone: America/New_York
- Confirmation: Bookings are confirmed instantly.
- Booking page: https://cal.com/mattbrooks.xyz/grantmaking.ai-funder-intro-call
- Event type id: 5467187

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=5467187&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": 5467187,
  "start": "<UTC ISO 8601 start from the slots response>",
  "lengthInMinutes": 25,
  "attendee": {
    "name": "…",
    "email": "…",
    "timeZone": "<IANA time zone>"
  },
  "guests": [
    "guest@example.com"
  ],
  "bookingFieldsResponses": {
    "notes": "…"
  }
}
```

- Required fields: `name` (Your name), `email` (Email address)
- Optional fields: `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.
- `lengthInMinutes` picks one of 25, 45, 60; pass the same value to the slots request as `duration`.