For more info: https://app.1inch.io/
Build a marketplace on which users could sell NFTs for any tokens, using the 1inch Limit Order Protocol. Alternatively, you can build an NFT auction based on the 1inch Limit Order Protocol.
Build your own Unicorn project from the scratch. Build it on top of the 1inch Aggregator or 1inch Limit Order Protocol for the most efficiency or feel free to create your own product.
Write a smart contract enabling the creation of limit orders for margin trading on the 1inch Limit Order Protocol.
Build an interface and smart contracts for margin trading using the 1inch Aggregation API. The 1inch Aggregation API has been successfully used in a range of projects, including MetaMask, Coinbase Wallet, Gnosis and Ledger.
Write a smart contract that creates buy/sell orders for stablecoins. The idea is to be able to buy stablecoins at lower rates and sell at higher rates, making a profit on rate differences. A smart contract would simultaneously create buy and sell orders.
Suggest your own solution, keeping in mind that the 1inch Limit Order Protocol has conditional execution and arbitrary price discovery.