Tynwald Day traders using card machines will be supported by Manx Telecom.
The company will provide extra coverage in St Johns on Monday to help with cashless payments.
Organisers say stallholders will be directed to reserved spaces off Station Road - and add there'll be no vehicle access to the Back Fairfield before 5pm.
You can find out more about this year's festivities here.
Bar George debts case heads to court
Do you know these men?
Garage warns of pothole which broke two wheels today
TT riders will miss special Bray Hill tree
Inflation steady at 3.3 per cent
Less than one percent of buildings on council blacklist
Senior Tynwald committee to look at healthcare funding
Government apologises after child benefit problems