get https://api.simplehash.com/api/v0/nfts/collections_activity
This endpoint provides the sales volume and market caps of specific collections. More collections and sales from different token types are being added over time. Note, from April 2023 onwards, the 90d and all_time values will be returned the same by default. For the previous behavior, pass all_time=1 as a query param.
To understand more about the difference between Collections and Contracts, please refer to our FAQ