Verifies blockchain database.
checklevel
nblocks
curl --user myuser --data-binary '{"jsonrpc":"1.0","id":"1","method":"verifychain","params":[]}' -H 'content-type:text/plain;' http://127.0.0.1:8332/
true
savemempool
verifytxoutproof
bitcoind.app — Bitcoin Core RPC Reference