Hey, I'm familiar with Uniswap V1, and V2. I have not worked with sushi swap, but from my understanding it is a fork of uniswap with some feature upgrades. I see no problem with what your asking for, but you would need access to an ethereum node to get pending transactions. So from what you mention in the description above, you would want the ability to add tokens to a list for real-time monitoring on a graph, as well as the ability to buy and sell at either exchange ? Any way send me a message if you'd like to chat more. I'm currently working on a Uniswap project that is similar to what you're asking for. Thanks
- Tyler