API reference · NFTs

NFT collection

Metadata, tokens seen and 24 h activity of one collection.

GET https://api.femtos.xyz/v1/nfts/collections/{address}

Parameters

Param	In	Example or values	Meaning
`address`	path	`<collection>`	Collection contract
`layer`	query	`elysium` (Elysium); `hyperevm` (HyperEVM)	EVM layer

Elysium

curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/nfts/collections/<collection>?layer=elysium"

HyperEVM

curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/nfts/collections/<collection>?layer=hyperevm"

Key: Authorization: Bearer $FEMTOS_KEY. Get a free key, or with no browser through agent onboarding.

Field	Type	Meaning
`layer`	string	Layer
`collection`	object	An NFT contract (one row per contract and standard): {address, standard, name, symbol, firstSeenBlock, firstSeenAt}
`standards`	string[]	Its standards (erc721, erc1155: a contract may emit both)
`tokens`	object	{count, capped}
`activity24h`	object	{from, to, fromBlock, toBlock, transfers, mints, burns, lastBlock}
`syncing`	true	Present while the layer syncs: data only up to dataUntil
`dataUntil`	ms	Indexed head time while the layer syncs

Active NFT collections GET /v1/nfts/collections Elysium, HyperEVM
Collections with the most transfers over the last 1 h or 24 h.
Collection tokens GET /v1/nfts/tokens Elysium, HyperEVM
Tokens of a collection by id, with their owner and metadata URI.
NFTs of a wallet GET /v1/nfts/owned Elysium, HyperEVM
ERC-721 tokens owned and ERC-1155 balances of one address.
NFT transfers GET /v1/nfts/transfers Elysium, HyperEVM
Transfers of a collection or one token, newest first. While HyperEVM syncs: the last 24 h or 7 d of indexed blocks.