# Jon Jackson – Cal.com booking page

> Reliable, affordable voter texts.**

Send texts for GOTV, persuasion, polls, fundraising, and more!




Founder & CEO, BallotBrain

Register your first cause now!

Booking page: https://cal.com/jj-ballotbrain

## Event types

- [15 Min Call (no video)](https://cal.com/jj-ballotbrain/15min): 15 min, confirmed instantly, event type id 848403. Quick discussion of high-level needs / custom pricing rates. Details: https://cal.com/jj-ballotbrain/15min.md
- [30 Min Demo](https://cal.com/jj-ballotbrain/30min): 30 min, confirmed instantly, event type id 848401. Video call to go over the platform interface and different messaging options. Details: https://cal.com/jj-ballotbrain/30min.md
- [Intros](https://cal.com/jj-ballotbrain/intros): 15, 20, 30 min, confirmed instantly, event type id 1218585. Details: https://cal.com/jj-ballotbrain/intros.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