https://instance_base_url/api?module=block

Get block reward by block number

getblockreward Returns the block reward and ‘uncle’ block rewards when applicable. Example:
https://instance_base_url/api
   ?module=block
   &action=getblockreward
   &blockno={blockNumber}
ParameterDescription
blocknointeger block number to check block rewards for eg. 2165403

Get estimated block countdown time by block number

getblockcountdown Returns the estimated time remaining, in seconds, until a certain block is included in blockchain. Example:
https://instance_base_url/api
   ?module=block
   &action=getblockcountdown
   &blockno={blockNumber}
ParameterDescription
blocknointeger block number to check block rewards for eg. 2165403

Get block number by time stamp

getblocknobytime Returns the block number created closest to a provided timestamp. Example:
https://instance_base_url/api
   ?module=block
   &action=getblocknobytime
   ×tamp={blockTimestamp}
   &closest={before/after}
ParameterDescription
timestampinteger representing the Unix timestamp in seconds.
closestclosest block to the provided timestamp, either before or after.
Note: How to convert date/time to a Unix timestamp.

Get the latest block number

eth_block_number Mimics Ethereum JSON RPC’s eth_blockNumber. Example:
https://instance_base_url/api
   ?module=block
   &action=eth_block_number
ParameterDescription
idoptional nonnegative integer that represents the json rpc request id.
More on json rpc request id.