getbestblockhash | Alchemy Docs

Returns the hash of the most-work fully-validated tip block in the active Bitcoin blockchain.

apiKeystringRequired

The hash of the best block in the longest chain.

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