The Derive API can handle both on-chain and pure orderbook requests.

This means that users can onboard onto the API via:

Onboard with no code or API requests (see "Getting Started" in the "Overview" section).
Continue to interact with the exchange and protocol via Interface or Session Keys
A smart-contract wallet is created as the proxy owner of the account which the original ETH wallet controls
Creating account, depositing, withdrawals and session key creation all possible via UX
Gives ability to monitor open trades / orders / history and even execute trades via UX + API
For mainnet: www.derive.xyz
For testnet: testnet.derive.xyz

Onboard completely through a combination of calls to on-chain contracts and requests to the API (see Onboard Manually)
Removes ability to interact with account via Interface.
Removes the "smart-contract" wallet layer