HiloVoice
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All topics
  1. Getting started
    1. Create your account
    2. Get started with the guided welcome
    3. Invite your team
    4. Keep your number and forward it to your agent
    5. Set up your first agent
    6. A tour of HiloVoice
    7. Get help
  2. Concepts
    1. What HiloVoice does
    2. The five kinds of agent
    3. Phone numbers and caller ID
    4. Campaigns and recipients
    5. Calls, leads and contacts
    6. Roles and permissions
  3. Building an agent
    1. How the builder works
    2. Describe the business
    3. Name the agent and give it a purpose
    4. Set your opening hours
    5. Handle each kind of caller
    6. Choose what the agent asks
    7. Give the agent answers
    8. Shape how a call sounds
    9. Give a Receptionist its number
    10. Write an outbound agent's opening
    11. Set a follow-up's goal
    12. Set when an outbound agent may call
    13. Give an outbound agent a caller ID
    14. Turn callers into leads
    15. Book appointments on a call
    16. Hand calls to a person
    17. Turn away callers you can't help
    18. Let the agent check your records
    19. Send messages after a call
    20. Review and go live
    21. Start a new agent from one you have
    22. Pause, archive or delete an agent
    23. Call new leads within seconds
  4. Agent playbooks
    1. Set up a receptionist for a clinic
    2. Confirm tomorrow's appointments
    3. Check the details you hold
    4. Ask for feedback after a visit
    5. Follow up on open quotes
  5. Testing and going live
    1. Test an agent with Try it
    2. Put a Receptionist on the web
    3. Check an agent before real calls reach it
    4. Your responsibilities on calls
  6. Campaigns
    1. How a campaign runs
    2. Create a campaign
    3. Import a campaign's recipients
    4. Set a campaign's calling hours and retries
    5. Monitor a running campaign
    6. Work the Needs a person queue
    7. Call a recipient again
    8. Read a follow-up's progress
  7. Day-to-day operations
    1. The Usage page
    2. Review your calls
    3. Follow up your leads
    4. Keep your contacts up to date
    5. Set up transfer destinations
    6. Put callers straight through to a person
    7. Block a number
    8. Keep up with notifications
  8. Integrations
    1. What you can connect
    2. Connect your own Twilio account
    3. Connect your calendar
    4. Send email from your own address
    5. Connect HubSpot
    6. Connect Salesforce
    7. Connect Slack
    8. Connect Zapier
    9. Send leads to your own system
    10. Add a lookup source
  9. Administration
    1. Change your organization's settings
    2. Manage members and roles
    3. Manage your phone numbers
    4. Plans, minutes and limits
    5. Make and revoke API keys
    6. Check who did what in the activity log
    7. Manage your own account
    8. Join the HiloVoice affiliate program
  10. Reference
    1. Glossary
    2. Campaign statuses
    3. Recipient statuses
    4. Follow-up dispositions
    5. Call statuses and outcomes
    6. Agent builder fields
    7. CSV columns
    8. Error messages
    9. Frequently asked questions

Connect your calendar

For OwnersChecked against the app on October 1, 2026

Connect the calendar your bookings live in, and an agent can find open times and book, move or cancel appointments on the call, with your calendar's own confirmations. You then choose the appointment on each agent's Appointment Booking step: see Book appointments on a call.

CalendarYou connect it withBooking on the call needs
CalendlyA Personal access tokenA paid Calendly plan, Standard and up. On the free plan the agent offers your link instead.
Cal.comAn API key, starting cal_live_Any Cal.com plan
Acuity SchedulingYour User ID and API key. Squarespace Scheduling works the same way.A paid Acuity plan. On the free plan the key doesn't verify.
Square AppointmentsA Production Access token, starting EAAAAppointments Plus or Premium. On the free plan the agent offers your booking site instead.
YouCanBookMeYour Account ID and API keyThe Team plan. On other plans the key doesn't verify.
HubSpot meetingsYour HubSpot connection, with one more scopeSee HubSpot meeting links, below
Google CalendarSigning in with GoogleAny Google account

An Appointlet page books on the call with nothing to connect. Any other booking page is offered to callers as a link.

Before you start

  • You're an Owner, Admin or Builder.
  • You can sign in to the calendar's account as its owner. On YouCanBookMe, only the owner can make the key.
  • Calendars are on every HiloVoice plan. HubSpot is on Growth and up.

Steps

Connect a calendar with a key

  1. Open Settings → Integrations and click the calendar. On the How to tab, click the button that opens its page, such as Open Calendly's API & webhooks page.

    Calendly's How to tab: the button to Calendly's API & webhooks page, above the steps to make a token there.

  2. Make a key for HiloVoice there (see the table below) and copy it. Calendly shows its token only once.

  3. Back on the Connect tab, paste it. For Acuity Scheduling, paste the User ID too; for YouCanBookMe, the Account ID (the account's email address works instead).

  4. Click the button to connect it, such as Connect Calendly. HiloVoice checks the key with the calendar before saving it.

The row reads Connected, with the account's name. The calendar's appointment types are now listed under Choose from your calendars, on an agent's Appointment Booking step.

CalendarWhere the key is made
CalendlyIntegrations & apps, then API & webhooks. Under Personal access tokens, choose Generate new token.
Cal.comSettings, Developer, API keys, then Add. Set it never to expire: an expiring key stops the agent booking on the day it lapses.
Acuity SchedulingSettings, Integrations, API shows the User ID and the API key. On Squarespace Scheduling: Scheduling, Integrations, API.
Square AppointmentsIn the Square Developer Dashboard, Create app, then its Credentials page, switched to Production. The token must read the merchant, items and locations, and read and write customers and bookings.
YouCanBookMeMy Account, Security: copy the account ID, then choose Generate your API key.

Connect Google Calendar

  1. On Settings → Integrations, click Google Calendar, then Sign in with Google.
  2. Choose the Google account whose calendar takes the bookings: a Google Workspace account or a personal Gmail one. A Workspace admin may need to allow HiloVoice first.
  3. Leave every box ticked and click Continue. HiloVoice asks to see your list of calendars, see when they're busy, and add and remove events. Booking needs all three.

Back on Integrations, a message says Google Calendar connected — <account>.

Google Calendar holds only events, so the appointment itself is set on the agent's Appointment Booking step: the calendar, its name, its length, where it happens, and when it can be booked (the agent's opening hours, unless you give it hours of its own). A booking goes on the calendar as an event with the caller as a guest, and Google emails them the invitation, with a Google Meet link for a video call. Other calendars on the same account, a personal one say, can be kept clear too.

HubSpot meetings come through the HubSpot integration: give its private app the scheduler.meetings.meeting-link.read scope as well (see Connect HubSpot). Your meeting links then appear under Choose from your calendars. HubSpot doesn't let HiloVoice cancel or move a meeting, so a caller who asks is taken down for someone to do it in HubSpot.

What happens next

  • A booking made on a call is the same booking your page makes, with the calendar's own confirmation emails and reminders.
  • On Acuity Scheduling and YouCanBookMe, a required question on the booking form is asked on the call and sent with the booking.
  • A YouCanBookMe page whose bookings you accept by hand is booked as a request, and the agent says so rather than calling it confirmed.
  • Square adds a caller it hasn't seen before as a customer, with the name, email and phone number the agent took.
  • Disconnect stops booking on the call: agents set up with that calendar offer the link instead. On Google Calendar, they take the caller's details for a call back.

If it does not work

You seeWhyWhat to do
Calendly rejected that access token., Cal.com rejected the API key. or Square rejected the access token.The key is wrong, or was deleted or expiredMake a new one and paste it, under Replace credentials if the calendar was connected.
Acuity rejected the User ID and API key. Check both, and that the account's plan includes API access (the free plan does not).The pair doesn't match, or Acuity is on its free planCopy both again from Acuity's API page. On the free plan, it can't be connected.
YouCanBookMe rejected the account ID and API key. Check both, and that the account's plan includes the API (it is a Team-plan feature).The pair doesn't match, or the account isn't on the Team planCopy both again from Security. On other plans, it can't be connected.
Square refused the request: booking through the API needs the Appointments Plus or Premium plan, and a token with the bookings, customers, items and merchant scopes.The plan or the token's permissionsCheck both in Square, then connect again.
Google Calendar wasn't connected, with HiloVoice wasn't given access on Google's page. Sign in again and press Continue to connect it.Google's page was cancelledClick Sign in with Google again.
Google Calendar was connected without permission to … which booking needs. Connect again and leave every box ticked.A box was unticked on Google's pageSign in again, with every box ticked.
In Choose from your calendars, Couldn't list <calendar>'s event types: …The calendar turned HiloVoice away, for the reason givenPut it right on the calendar's side (for HubSpot, add the meetings scope), then click Test connection on its row.