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  • World of Warcraft
  • 544,309 Monthly Downloads
  • Supports: 5.4.8
  • 20,666,564 Total Downloads
  • Updated 08/25/2014
  • Created 06/06/2009
  • 9,672 Favorites
  • Project Site
  • Comments
  • Release Type: Release
  • License: GNU General Public License version 3 (GPLv3)
  • Newest File:
Support development! **

About _NPCScan

_NPCScan tracks seldom-seen rare mobs by proximity alone, making the old “/targetexact …” macros obsolete. It has the same range as those targeting macros, but you won't have to mash any buttons. Just go about your business and let _NPCScan alert you when it finds something.

V5.x Changes
  • Due to changes in how the addon stores data, some settings might get reset when updating.
  • The default alert is suppressed while on flight paths by default. If a mob is found, the whisper sound effect will play and the mob & location will be placed in the chat log. You can turn this off from the settings.
  • _NPCScan now includes all rare mobs in the game.
  • The "One of Many", "Timeless Champion" & "Champions of Lei Shen" Achievements have been added.
  • Rare Mobs and Tameable Mobs have their own tabs now.
  • Custom mobs have been added for the Ghostly Pandaren Fisherman & Craftsman.
  • Individual mobs can be removed from their tabs to stop tracking them.

If you have a question check the FAQ, or a problem create a ticket

If you have a question/comment about _NPCScan.Overlay please post it in it's comment section.



NPCScan now tracks "vignettes". These are the little skulls appear on the minimap, that denote rare mobs. This is a beta feature and is disabled by default. Enabling this feature will alert you to a rare that's within minimap range, without any worries about having to clear your cache. When you get an alert you will be shown a target button similar to the standard mob alert, letting you know that a vignette mob was detected. Clicking on the target button will try and target the mob. Once a mob is targeted, the target button will update to reflect the mob found.

Known Issues: Currently there is no way to detect what mob the vignette represents. Because of this there is no way to filter out and ignore individual mobs. The vignette tracking will ignore achievement mobs groups that have their tracking turned of via unchecking their tab. Also the targeting button might have some issues if there are more than one vignette mobs in target range and may not work 100% of the time.

The Cache

This addon doesn't use nameplates or mouseover units to find rares. Instead, it checks your creature cache for the moment a rare mob is found. There is one catch to this technique however: Once a mob is “found”, _NPCScan won't be able to find it again until your cache is clearedf you find a rare mob's corpse—Dirkee for example—you would have to clear your cache before _NPCScan would find Dirkee again. Thankfully, clearing your cache is a safe and simple matter.

Clearing Your Cache

To clear your cache, follow these straightforward steps:

  1. Exit World of Warcraft
  2. Delete the “Cache” sub-directory inside your World of Warcraft folder.  For example on a standard Windows XP installation, you would delete the folder “C:\Program Files\World of Warcraft\Cache”.
  • Advanced users can delete “C:\Program Files\World of Warcraft\Cache\WDB\enUS\creaturecache.wdb” specifically to improve log-in times, where enUS is your language code.

Note: Windows Vista and Windows 7 users see this info if your cache isn't in the location above.

That's it. Log in after you've done that and you'd be able to find Dirkee a second time. It's completely safe because WoW will recreate your Cache folder after you log in again.

Cache Warning

If a rare mob is already cached when you log in, _NPCScan will print a warning message with the names of those mobs. If you see this message but still want to find the listed NPCs again, it's time to clear your cache by following the above procedure; Otherwise, you can quit searching for those mobs using the Search options window detailed below. You can suppress this log-in message using the main options pane, as well.

“Found” Alert

When a rare mob is found, _NPCScan alerts you by playing a loud and distinctive sound, making your screen pulse red, and displaying an animated Targeting Button. To get a feel for what this alert looks and sounds like, try the “Test Found Alert” button in the addon's main Interface Options panel. (See the Options section below.)

Targeting Button

When clicked, the targeting button tries to target the most-recently-found mob.  You can also bind a key to hit this button. If the default button position isn't to your liking, you can move it while holding your CTRL key.

Note: The button cannot be shown during combat. In the unlikely case that you do find a rare while fighting, the button will appear after you leave combat. You will still hear the alert however, and the name of the mob will appear in your chat log.


_NPCScan's main options window can be accessed from the Interface Options menu. This panel includes a “Test Found Alert” button, various ways to customize the alert sound, and an option to suppress cache warning messages on log-in. New sounds can be added to the alert sound dropdown menu by installing SharedMedia-type addons.

Search List

The list of mobs that _NPCScan searches for can be modified easily through the Interface Options panel, however it comes pre-configured with most rare Outlands and Northrend mobs.; To access the mob list, type “/npcscan”. Grayed out NPCs in a list aren't being searched for, either because they're cached or not needed for their achievement.

The first tab available lists Custom NPCs that you can enter or remove manually. NPCs that are already cached show a red “X” in the first column. You can add or remove Custom NPCs with the [+] and [-] buttons at the bottom right.

All other tabs control achievements like Bloody Rareand Frostbitten. These tabs show an additional column on the right with green check marks for completed achievement mobs. You may enable or disable tracking each achievement with its tab's checkbox.

To remove non custom mobs from a tab, click on the mob that you want to remove and then click on the "Remove" button. This will remove the selected mob from the current tab and add it to the Ignore List Tab. If you ever want to restore a Ignored Mob, select it from the "Ignore List" tab, click the "Remove" button and it should be added back to its original tab.

The “Search for completed Achievement NPCs” checkbox at the top left of the pane allows you to keep looking for mobs you no longer need for achievements.

Finding NPC IDs

A mob's NPC ID is its unique identification number, and it can be found on sites like WowHead or WowDB For example, search for the mob “Dirkee” on WowHead and go to the mob's page.  That page's URL will look like

32500 is Dirkee's NPC ID.


The only problem mobs for _NPCScan are tamable beasts & Battle Pets. Whenever you run across the tamed version, _NPCScan gets tricked into thinking that mob is nearby. In order to prevent those false positives, _NPCScan only shows alerts for tamable mobs in their original zones That is, if you spot Loque'nahak in Dalaran instead of Sholazar Basin where it usually patrols, _NPCScan would ignore it. When one of these tamable mob false-alarms happens, you'll see a message in your chat window explaining why it got ignored.

Since this makes tamable mobs are so difficult to track, I suggest you fly to the tamable mob's zone first, clear your cache, and then search for it.; Any time you pass through a populated area like Dalaran, you risk filling your cache with popular rare pets.

For Battle Pets there is no way for it to determine if a mob is a spawn or someone's pet. Many Battle Pet addons and just opening the Pet Journal will often cause Battle Pets to become cached.

James D. Callahan III <>
2014-08-25 19:12:48 -0500


James D. Callahan III:
    - Moved CacheWarnings option to global from per-character.
    - Cleanups
    - Removed commented-out code.


First Previous Page 77 of 150 Next Last
  • #1605

    i turned on the thing for the errors to show up and like 20 things came up i've also try to turn on npc scan by itself it still isnt working:(

  • #1602

    Good job adding the details as to what's going on. I just downloaded NPCScan yesterday for the first time, so I'm new to the addon, but it worked for me. Perhaps the project manager will be able to make some suggestions that may help you, now that you've explained what's happening.

    You might want to make sure that you have "Display Lua Errors" turned on in the Interface-Help tab, in case there's something that's keeping it from loading. You could also try disabling all of your other addons temporarily and see if one of them is conflicting with this one. If NPCScan runs with your other addons disabled, then you could try turning them back on one at a time to see which one has a conflict with NPCScan.

  • #1598

    ok when i log into wow u know u got the tab that says add ons ok well its on that list and i checked it and said load out of date stuff ok when i go in world its no where to be found i go to inferface etc its not on that list i've deleted it cleaned the cache re down load and its still not working

  • #1591

    Hey guys, I'm just thinking?

    Would'nt it be better if you had a script that could automaticly run between the spawn points, when you AFK or sleeping? I'm farming Poseidus atm. But out of the 4(5) spawn points it reduced my chance to catch it with 75%. And if it's not possible because of terms, why can we then have anti-AFK programs, marcos and so on without getting banned? Moving from the diffrent spawn points would'nt disturb anyone, unless they are farming the same mount? And there has to be some challenge, but im just saying it would be alot easier.


    Image eksample:

  • #1593

    That would be automated gameplay, and as such isn't allowed. A macro doesn't play the game for you-- having a bot that moved your character from one location to another would be "playing the game" for you. It would be a bannable offense IMO.

  • #1590

    Terrorpene just disappeared from NPCScan and NPCScan overlay over night.. Is there something I missed? I've cleared cache, relogged, exit/enter game, different toons etc, it's just gone.

    Deleting an NPC is one thing, but when it disappears from the Overlay as well I'm thinking this is done on the Author end :o

  • #1589

    My question...

    Does this addon work in Eastern Kingdoms and Kalimdor?  I've been debating whether I want to use this addon or Silver Dragon, but if this doens't work in the old world...then it's not the one for me.

    The reason I ask is I flew very close to 2 rares yesterday and NPC didn't do a thing.

  • #1606

    No, it doesn't work for that -- you're better off with Silver Dragon for vanilla rares.  It does work in Cata zones for the new rares just fine.

  • #1588

    I really like NPCScan, but the thing that I most dislike is once it finds a rare, it will not alert you again of that rare for a considerable period of time.  This is very irratating when you find a rare and that toon already has killed it, but another toon still needs it.  NPCScan will not find the rare again on the alt and you have to manually find them if you can.

  • #1592

    If you read the description, it says that once a mob is found and cached you have to delete the cache before it's found again. If you found a rare on one character, log out and delete your cache, the alert will be shown as soon as you find it again

  • #1587

    That would be the same known problem with all mobs, and not just pets. You probably seen Npcscan alerts go off when any rare is dead too. Once we actually click to target the mob will the blizzard functions know the difference between alive, dead and tamed, but is too late because the alert already popped up to annoy us. Unfortunately, blizz has blocked /target from being run automatically from addons to check all this before the alert pops.

  • #1585

    I would love it if NPC Scan could tell the difference between a LIVE & UNTAMED beast to one that's tamed or dead.

    "No other object has been misidentified as a flying saucer more often than the planet Venus..." 
    X-Files Ep: 3x20 - Jose Chung's 'From Outer Space'

  • #1584

    Total rubbish... I load the add on and as soon as I enter a new zone the scan tool catches all of the rares listed and deletes them from the registry...

  • #1597

    I have noted a similar behaviour. I now have deleted the creaturecache file *twice*, but it still lists a large number of rares as cached although I definitely did not get any alarms and have not even *been* in those zones. It puzzles me greatly. I will uninstall and reinstall this addon and see if that helps.

  • #1583

    Sometimes _npcscan will find something when I'm on a flightpath, which is fine - I just don't know where to go look when I've landed. A spot on the minimap and/or some coordinates of where said mob was last seen would be really useful.


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