Is there a light crypto wallet that
- supports top 5-10 cryptocurrencies, and
- allows API access?
API is a Must. Thanks for any hints!
Multicurrency (with 5-10 "top" currencies) and MUST have API? Then you're probably looking at having to leverage the functionality and custodial wallets of exchanges... I don't think that there are any desktop wallets (or "web" wallets for that matter) that will provide the functionality you're wanting.
What exactly are you wanting to do? create a trading platform or something?