Appointment reminder SMS API for approved businesses

Why appointment reminders fit SMS

Appointment reminders are direct, timely, and useful. The customer gave a phone number during a booking or intake flow, and the message helps them avoid missing something they already scheduled. That is the kind of operational SMS Text King is built to review.

A good reminder does not need a sales pitch. It needs the business name, appointment context, date or arrival window, and a short way to get help or opt out.

What should the consent path say?

Your booking form should be clear that the customer is signing up for text messages from your business. It should describe the message type, say that message frequency varies, mention that message and data rates may apply, link to privacy and terms, and explain STOP and HELP replies.

Text King's SMS consent page includes the public disclosure language expected during review. CTIA also publishes messaging best practices that are worth reading before you collect opt-ins.

What does a clean reminder request look like?

Keep the API call tied to one recipient and one appointment event. Store the consent source in your own system, then pass a message that identifies your business and avoids unnecessary private details.

curl -X POST https://text-king.com/v1/messages \
  -H "Authorization: Bearer tk_live_..." \
  -d to="+14155550123" \
  -d message="Northside Dental: Reminder for your appointment tomorrow at 2:30 PM. Reply STOP to opt out." \
  -d consent=true

Can reminders include links?

Sometimes. A booking confirmation link or reschedule link can make sense, but links are often reviewed more closely because they can be abused. If your reminder includes a URL, explain the link purpose during account review and keep the domain aligned with the business the customer already knows.

The safer first send is plain text: business name, appointment time, and opt-out path. Add links only when the customer experience needs them.

Related Text King pages