Smart Octopus: Pricing is a SmartThings SmartApp that integrates Octopus Agile tariff information with your SmartThings device to enable control of devices based on current Agile pricing.
Feel free to use my referral code and get £50 credit to your account (as well as mine): https://share.octopus.energy/jade-ibex-708
Add this git repository to your SmartThings IDE (https://graph.api.smartthings.com/ide/") and synchronise the code. You can then find it in the 'SmartApp' section of your SmartThings app.