setlabel "address" "label"

The setlabel RPC intended as a replacement for the deprecated 'account' API.

*bitcoin-cli help setlabel

setlabel "address" "label"

Sets the label associated with the given address.

1. "address"         (string, required) The bitcoin address to be associated with a label.
2. "label"           (string, required) The label to assign to the address.

> bitcoin-cli setlabel "1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX" "tabby"
> curl --user myusername --data-binary '{"jsonrpc": "1.0", "id":"curltest", "method": "setlabel", "params": ["1D1ZrZNe3JUo7ZycKEYQQiQAWd9y54F4XX", "tabby"] }' -H 'content-type: text/plain;'