WorldEdit craftscript to search through the NBT of blocks in your selection. Supports regex.

searchnbt.js

importPackage(Packages.com.sk89q.worldedit);
importPackage(Packages.com.sk89q.worldedit.blocks);


function main() {
    context.checkArgs(1, -1, "<regex>");  
    
    var regexString = argv[1];
    for (var i = 2; i < argv.length; i++) {
        regexString += " " + argv[i];
    }
    var regex = new RegExp(regexString);
    regex.ignoreCase = true;
    regex.multiline = true;
    
    var blocks = context.remember();
    var session = context.getSession();
    var target = WorldEdit.getInstance().getServer().matchPlayer(player).getPlayer();    
    var region = context.getSession().getRegion();   
    
    if (region == 0) {
        player.printError("Please select a region!");
        return;
    }
    
    player.print("Searching blocks in selection for §f" + regexString);
        
    var amount = 0;
    
    for (var x = 0; x < region.getWidth(); x++) {
        for (var z = 0; z < region.getLength(); z++) {
            for (var y = 0; y < region.getHeight(); y++) {
                var loc = region.getMinimumPoint().add(x,y,z);
                var b = blocks.getBlock(loc);
                if (b.hasNbtData() && regex.test(b.getNbtData().toString())) {
                    player.printDebug("Found " + b.getId() + " at " + loc);
                    amount++;
                }
            }
        }
    }
    
    player.print("Blocks found: §f" + amount);    
    
    return;
    

}

main();