API reference · NFTs

Active NFT collections

Collections with the most transfers over the last 1 h or 24 h.

GET https://api.femtos.xyz/v1/nfts/collections

Parameters

Param	In	Example or values	Meaning
`layer`	query	`elysium` (Elysium); `hyperevm` (HyperEVM)	EVM layer
`window`	query	`24h`, `1h`	Window
`limit`	query	`20`	Rows

Elysium

curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/nfts/collections?layer=elysium&window=24h&limit=20"

HyperEVM

curl -H "Authorization: Bearer $FEMTOS_KEY" "https://api.femtos.xyz/v1/nfts/collections?layer=hyperevm&window=24h&limit=20"

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

Field	Type	Meaning
`layer`	string	Layer
`window`	string	Window
`from`	ms	Window start
`to`	ms	Window end
`fromBlock`	int	First block
`toBlock`	int	Last block
`collections`	object[]	{address, standard, name, symbol, firstSeenBlock, firstSeenAt, 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

NFT collection GET /v1/nfts/collections/{address} Elysium, HyperEVM
Metadata, tokens seen and 24 h activity of one collection.
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.