Block height - The block amount and size on the blockchain (in blocks) on generation of the present block Nonce - The transaction selection for the from address (bear in mind this starts at 0 so a nonce of 100 would really be the 101st transaction submitted by this account) https://bookmarkpressure.com/story20335554/5-easy-facts-about-blockchain-explorer-api-described-https-mathiasen-curry-2-federatedjournals-com-diving-deep-blockchain-explorers