Harryg
10/13/2025, 3:21 PMVapi Support Bot
10/13/2025, 3:23 PMcalendarId, startDate, endDate, and timezone fields. A common issue is missing or incorrect values, especially for calendarId and timezone. Here’s an example payload:
json
{
"calendarId": "YOUR_CALENDAR_ID",
"startDate": 1700000000000, // epoch ms for start of day
"endDate": 1700086399000, // epoch ms for end of day
"timezone": "America/New_York"
}
You can find your calendarId in GoHighLevel under Settings > Calendars. Make sure the date range covers the full day to see all available slots.
For more details, see the [GoHighLevel tool configuration documentation](https://docs.vapi.ai/tools/go-high-level).
Source:
- [GoHighLevel Tool Configuration Documentation](https://docs.vapi.ai/tools/go-high-level)Harryg
10/13/2025, 4:45 PMChiranjeet Mishra
10/14/2025, 7:14 PMcalendarId (found under Settings > Calendars in GoHighLevel).
3. **Add Tools to Assistant**:
- Go to Dashboard > Assistants page.
- Select your assistant and open the Tools tab.
- Choose and add the GoHighLevel tools.
4. **Configure Assistant System Prompt**:
- Craft clear instructions for your assistant using the tools in sequence for contact management and appointment scheduling.
Make sure you have the prerequisites, including a GoHighLevel account and calendar permissions. Detailed steps are available [here](https://docs.vapi.ai/tools/go-high-level).