eth_blockNumber | Alchemy Docs

apiKeystringRequired

The block number of the most recently mined block as a hexadecimal string.

1	curl -X POST https://superseed-mainnet.alchemy-blast.com/v2/{apiKey} \
2	-H "Content-Type: application/json" \
3	-d '{
4	"jsonrpc": "2.0",
5	"method": "eth_blockNumber",
6	"params": [],
7	"id": 1
8	}'