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  • World of Warcraft
  • 176,174 Monthly Downloads
  • Supports: 5.4.2
  • 17,867,752 Total Downloads
  • Updated 02/09/2014
  • Created 06/06/2009
  • 9,305 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.

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.

SLOKnightfall <>
2014-02-09 11:44:06 -0800

tagging changes


    - -Fix for stored_options error
    - -Updated the NPCScan.AutoAdd error version check
James D. Callahan III:
    - Cleanups.
    - Made the Debug function a null-op if not running a development version.
    - Added debug output frame - only available in development code. Prevents forgotten debug prints from occurring.


First Previous Page 2 of 144 Next Last
  • #2763

    Alert incorrectly doesn't go off when you spot a rare outside of its zone, eg near the zone border. For example, just outside Thousand Needles it says "False alarm because you're in Tanaris". Any fix for this?

  • #2764

    Unfortunately there is currently no fix for it.  The false alarm message is only shown for tameable mobs due to the possiblility for them to be ouside their normal areas as a hunter pet.  Because of this, it is possible for actual rare mob to trigger as a false alarm if it is close to a border and the player is in a diffrent zone. There is no way for the addon to tell is a mob is a actual rare or a pet when it gets detected, which makes it impossible to deal with the problem.

  • #2762

    Are there any known problems trying to find NPC's 50409/50410/50411 i've been searching over the span of 2 weeks and i know they are rare spawns but i can't seem to pick up on any of these npc's. They are the mysterious camel figurine. 

  • #2765

    I believe they should still be detectable using NPCScan.  Keep in mind that they have a 6-12hr (i believe) spawn timer and there is only one going to be one figure spawned at a time, so it can take a while to see. Especially if there are others looking for it also.

  • #2766

    Thank you for your reply, i'll keep checking back.

  • #2760

    Is there a way to get rid of: "The following unit(s) cannot be searched for while tamed: " ? Trying to help a friend find some of the rares I already tamed but doesnt work.

  • #2761

    You might need to put them in the stable, log, then clear the cache.  The message is being displayed because the game is caching them from your active pet slots and or stables, which makes it impossible for NPCScan to search for once its cached.

  • #2754

    I have been getting this error since the last patch. Addon seems to be working though.

    Message: [string "Death and Respawn Check"] line 51:    attempt to index field 'states' (a nil value) Debug:    [string "Death and Respawn Check"]:51: DeathAndRespawnCheck()    [string "Display Damage"]:23: SetHealth()    [string "Init Player Team"]:283: InitPet()    [string "Init Player Team"]:184: InitTeam()    [string "PetBattle - 0. Init and Main Loop"]:54: in main chunk Locals: pet = <function> defined =[C]:-1 forced = <function> defined @Interface\AddOns\!Swatter\Swatter.lua:226 lookAtPos = "[string "Death and Respawn Check"]:51: attempt to index field 'states' (a nil value)" deathKitID = <function> defined @Interface\AddOns\!Swatter\Swatter.lua:158

    AddOns:   Swatter, v4.4.0 (<%codename%>)   NPCScan, v5.4.2.6   NPCScanOverlay, v5.4.2.1   Altoholic, v5.4.001   Auctionator, v3.1.5   BattlePetCount, v1.7.4   CensusPlus, v6.1.0   Collectinator, v2.0.10   Coordinates, v1.13   DataStore, v5.4.001   DataStoreAchievements, v5.4.001   DataStoreAgenda, v5.4.001   DataStoreAuctions, v5.4.001   DataStoreCharacters, v5.4.001   DataStoreContainers, v5.4.001   DataStoreCrafts, v5.4.001   DataStoreCurrencies, v5.4.001   DataStoreInventory, v5.4.001   DataStoreMails, v5.4.001   DataStorePets, v5.4.001   DataStoreQuests, v5.4.001   DataStoreReputations, v5.4.001   DataStoreSpells, v5.4.001   DataStoreStats, v5.4.001   DataStoreTalents, v5.4.001   DBMCore, v   DBMPandaria, v   DBMScenarioMoP, v   DBMStatusBarTimers, v   DebugLib, v5.1.DEV.312(/embedded)   HandyNotes, v1.2.0   HandyNotesLostAndFound, v1   MiniPetQ, v2.11   MountQ, v1.8   Omen, v3.1.8   PetBattleMaster, v1.10.3   Quartz, v3.1.4   Rarity, v1.0   RarityOptions, v   Recount, v   SlideBar, v4.4.0 (<%codename%>)   Stubby, v5.13.5258 (BoldBandicoot)   BlizRuntimeLib_enUS v5.4.7.50400 <us>   (ck=445)

  • #2758

    This isn't a npcscan bug. It's a pure blizzard bug that got introduced with some recent hotfixes, and it occurs with no addons installed too. 

    It mostly happens close to spawn points, or when hovering your mouse over some class with a pet. 


  • #2755

    A lot of poeple have been getting this error, it doesnt appear to be directly related to any one addon

  • #2753

    I'm having a problem with NPCScan for a couple of weeks. I reinstalled it and now the list of the rares in the map is gone! I can see where they spawn, but cannot see who spawns where (there is no color list with their names).

    Already tried installing and uninstalling, but nothing changed.

    Please help me! (:

  • #2756

    That has to do with npcscan overlay addon

  • #2757

    Oh, I'm sorry, but thank you! I'll ask there :D

  • #2750

    For about the last week, NPCScan will only pick up rares in Pandaria. Doesn't even list the rares anywhere but Pandaria. I was in Western Plaguelands, standing right in front of a rare and the add on didn;t go off. i looked at my map and it didn't even list any of the rares there.

  • #2752

    Can you verify that there is a check next to the Rare Mobs, and Tameable Beasts tabs in the settings menu.  It sounds like they got unchecked which will cause NPCScan to not give alerts for any mob in those tabs or display them with NPCScan.Overlay.

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