This endpoint is commonly used to pass specific wallet addresses to get back a summary of the NFT contract ownership of these addresses. A common use case could include token-gated experiences - if supplying a set of wallet addresses and NFT contracts, you could check whether each wallet owns an NFT that is part of a specific contract or not:
To supply multiple values, provide them comma separated in the query params, e.g., chains=optimism,ethereum&wallet_addresses=0xa12,0xb34. ENS addresses can also be provided for the wallet_addresses.
To understand more about the difference between Collections and Contracts, please refer to our FAQ