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  • World of Warcraft
  • 539,680 Monthly Downloads
  • Supports: 5.4.8
  • 20,691,475 Total Downloads
  • Updated 08/25/2014
  • Created 06/06/2009
  • 9,681 Favorites
  • Project Site
  • Comments
  • Release Type: Release
  • License: GNU General Public License version 3 (GPLv3)
  • Newest File:
Support development! **

About _NPCScan

_NPCScan & Warlords

Due to changes in how the game caches mobs in WoD, it is looking like _NPCScan will no longer be able to auto detect non-Vignette mobs. Due to this the only way to find pre-MoP rares via _NPCScan will be via mouse over or the new dynamic target macro keybind being added. The new keybind will trigger a /targetexact …” macro that updates with tracked mobs based on the zone you are currently in. Vignette mobs will still automatically trigger an alert when the mob gets in range, and should work more reliably due to updates to the Vignette API.

_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 1 of 150 Next Last
  • #2894

    Okay, thanks.

  • #2892

    How do I send a link for found rare mobs into chat such as "x spawned at cords y, z?"

  • #2893

    Currently NPCScan does not announce alerts to chat.  You would need to use a seperate addon if you want to link rare mob alerts into chat.

  • #2889

    I'm trying to add all NPCs for Over Their Heads achievement, using console commands

    /npcscan add 63667 Garalon

    but it does not work, I get addon's help, the text says:

    "Los comandos son: "/npcscan add <NpcID> <Nombre>", "/npcscan remove <NpcID o Nombre>", /npcscan cache" para listar los NPC en cache, y simplemente "/npcscan" para el menu de opciones."

    ¿what`s wrong? My locale is ESes.



  • #2890

    It looks like the command line commands are localized and the ESes & ESmx got changed from "add" to "AÑADIR".  Try "/npcscan AÑADIR 63667 Garalon" and it should work.  If not you can add custom mobs via the options menu

  • #2891

    Thanks, works fine. I did not think that the command could be localized too.

    I know how add from options menu, but i`m using a macro that adds all npcs for achievement.

    It would be nice to update the localized help text with right commands.
  • #2886

    Is there anyway that when you kill any rare on npc's list it will get the green checkmark by it not just for those on an achievment? especially since you sometimes find the rares and they are already dead but npc marks them as found anyway.

  • #2888

    Not currently, but it might be possible.  The achievement kills are somthing that is tracked by the game and can be refrenced easily.  I'll have to look to see if there is a good way to determine the kill info and the best way to store the data. 

  • #2884

    How can i stop NPC Scan from doing this  every time i go into a new zone and on every single character no matter how many times i turn off cache reminders? So irritating. It started doing it just this week after using the addon for longer than i can remember.

    Last edited by drethna on 8/20/2014 8:25:33 AM
  • #2885

    Create a file on your desktop and add this:
    rmdir /s /q "C:\whatever\World of Warcraft\Cache"

    Change it accordingly then rename the file to "whatever.bat". Use it maybe once a day and you never see that again.

  • #2882

    Recently NPCScan has had a huge delay before alerting me to a rare. To the point where I'm literally standing right in front of the rare, and yet NPCScan still takes up to 10 more seconds to Alert me.

    Last edited by ThunderLost on 8/11/2014 12:38:46 PM
  • #2880

    The cache reminder that prints every time you relog or on loading screens is getting quite annoying.

    Yes, I am perfectly aware that you can disable it, however, it's enabled by default and I have quite a lot of alts, and the setting is per character only and I play WoW from multiple computers.

    Is there some way to make a global disable of this and not per character?

  • #2879

    I cleared my cache and now I'm getting the following when logging in (doesn't matter what zone).  Note:  the () are mine and I removed the actual tameable beasts that show up.

    The following unit(s) cannot be searched for while tamed:

    Bai-Jun the Butcher (Mogu)
    Gaohun Soul-Severer (Mogu)
    Spirit of Lao-Fe (Mogu/Undead)
    Vyraxxis (Humanoid)

    Last time I checked you can't tame humanoids so what's up?

    For reference, here's the beasts that always show up on the above notice:

    Bloodtip, Kri'chon, Vicejaw, Wulon.

    Last edited by PlainVanilla on 8/2/2014 9:54:05 PM
  • #2875

    I've been using this addon for awhile and have always been curious... why do WE (the user) have to manually clear our creature cache? Why isn't the addon designed in a way to add a feature to clear the creature cache? I know it would probably make every user incredibly happy. I have quite a few alts, 6 of them are hunters and I'd like to be able to find rares on all my hunters without having to manually clear the cache.

  • #2876

    NPCScan works by checking to see if a tracked mob has been added to the game's cache.  Because the cache is part of the actual WoW software, there is no way for addons to modify it in any way.  The only way that the cache can be deleted is for the user to manually delete it while the game is not running.

    Last edited by SLOKnightfall on 8/2/2014 3:02:40 PM
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