You used those URLs for SmartApps with OAuth access, right? This one in particular communicates with the Groovy SmartApp and allows you to use the endpoints you configured. As Groovy SmartApps won’t be available beyond Dec 31st, you won’t be able to make that request successfully.
The other two are only to get an Access Token, I’ll ask the team about them, but depending on what you’re trying to do, they might not be necessary.
The SmartThings API lets you interact with your devices (list them, send commands, get their status) and you only need a Personal Access Token.
Can you provide more details about your use case to have a better reference, please?
Here our application is not Groovy smartApp. Our application which is running in our server using those endpoints for OAuth access and providing control for devices by using the API of the smartthings. So I want to know whether the below APIs will be available after Dec 31st 2022?