Is there an Ethereum API where I can drop an arbitrary number of Ethereum addresses and then see a reverse chronological feed of all their on-chain activity?
Etherscan has this but for a single address https://docs.etherscan.io/api-endpoints/accounts#get-a-list-of-normal-transactions-by-address
You can do this on Airstack, depending how you define "all" on-chain; and whatever is not there rn we could add quicklyl in your use case, which activities would be included? - transfers - sales - mints - DAO votes? - contract interactions? Let’s chat and figure out what you need! ... longcast.jam.so/jjOmaq
u have to specify the on-chain events you’re looking for to constrain the query. some useful APIs to check out - spec.dev, goldsky, https://coherent.xyz
May not exactly fit your use case but this app is pretty neat to visually see on chain interactions of DAOs and their participants. https://pod.xyz/
I've done that with zapper.fi, I created a group of addresses and it coalated them into a single feed