The SimpleHash API returns information on the collection an NFT is associated with. These are often specific to certain NFT marketplaces. The following are the fields included for the collection model (appearing inline as a field on the NFT model). Currently the SimpleHash API includes collections found on OpenSea, Trove, Quix, and Stratos.

collection_idUnique identifier for a specific collection. This is distinct from contract address, since a contract may contain multiple collectionsstring / null
nameName of the collectionstring / null
descriptionDescription of the collectionstring / null
image_urlURL link to the collection logo / main image on the SimpleHash CDN, where availablestring / null
banner_image_urlURL link to the collection banner image on the SimpleHash CDN, where availablestring / null
external_urlURL link to the external website or resource associated with the collectionstring / null
twitter_usernameTwitter handle of the account associated with the collection, where availablestring / null
discord_urlDiscord server associated with the collection, where availablestring / null
marketplace_pagesArray of 0 or more objects referencing the the collection's page(s) on a given marketplace. marketplace_collection_id is typically a case-sensitive slug (e.g., azuki for OpenSea) and sometimes an address (on marketplaces such as Quixotic and Stratos)[{
marketplace_id: string, marketplace_name:string,
verified:boolean / null
metaplex_mintUnique metaplex mint ID, populated only for Solana NFTs where there is a verified metaplex collectionstring / null
metaplex_first_verified_creatorWhen a verified metaplex collection is not available, this identifier may be used to group by the first verified creator addressstring / null
spam_scoreSpam rating of the NFT collection (for Enterprise plans), 0-100 range, (100 being most likely spam)int / null
floor_pricesArray of 0 or more floor prices for the collection, one for each marketplace[Floor price model]