MAS has recently launched a My Singapore Savings Bond portal where you can check your holdings for SSBs, keep track of your incoming interest and compare interest rates. SingPass is required to access to the portal.
Once you login, you will see 3 main sections.
My Savings Bonds Upcoming Interest Payments This Month's Timeline

The first section shows an overall summary of your holdings and the breakdown into both Cash and SRS holdings. It will show the total interest payment you will receive if you hold all your holdings to maturity. You will also see the remaining amount which you can apply before reaching the Individual Limit of $200,000.

You can then click on the 'View Details' to see the details of your holdings.

From this page, you can select up to 3 issues for interest rates comparison. You can also check your pending transactions such as application

...