Bond Screener and Portfolio Building Tool

My friend and I have recently been looking into the bond market as yields on government bonds and investment grade credit have climbed substantially this year and are starting to look attractive for people who want to invest with a specific short-term goal in mind (saving for a house deposit, school fees for children, etc). We both come from countries where people predominantly invest in bonds (jumping through quite a few hoops to do so and in some cases going to the post office to purchase them) but it is quite obvious that the level of information on bonds is not nearly as widely available as that for stocks and ETFs (which is normal since the universe is much bigger and constantly changing, the instrument types are much more diverse and some bonds are quite illiquid).

So we decided to try and tackle the problem by collating as much information about bonds as possible from various sources to create a comprehensive bond screener tool. We're constantly adding new data and instruments and an API is currently in the works. In addition, we are planning to build a portfolio tool that can help individuals build custom portfolios that suit their own needs (different maturity ladders, yield and income levels, risk and liquidity).

Feel free to check out the screener here: terrapinfinance(.)com

Any thoughts, feedback and suggestions on how to improve it would be very welcome! Thank you.