We offer a payment feature to take credit card numbers only within the calendar as a booking security measure or you can later process on your own terminal. 

If bookings need to be pre-paid you can use the following payment gateways. These require you to setup a merchant account.

• Paypal, Paypal Pro US, Paypal Pro UK,
• Authorize.net
• Cardservice.com
• QuickBooks Merchant Service (US)
• HSBC (UK)
• St. Geoge Bank (Australia)

Google Calendar API

This will update all your bookings in your Google Calendar.
For more information about Google API Click Here

ClarityAccounting.com

Clear and simple accounting system.
Simply activate the Appointment.com API within your ClarityAccounting.com settings to have an online scheduler and online accounting system working together.
Click here to get more information about ClarityAcounting.com

Message Media

SMS provider to send SMS message as reminders to customers
For more information about Message Media Click Here

We are offering an extensive Application Interface Library which can be easily integrated into any other software.
Click here to see API Library.

www.IgoFigure.com as an example integrated Appointment.com into their sophisticated membership software.