Ok, so I noticed that there does not seem to be one comprehensive place that describes all the castle age links available in the game and what all the little bits and pieces mean. So I'm going to put together a guide with my own research and maybe some of your input as well.
(NOTE: Castle age recently made a change to the user= link it is now casuser= I do not know if this is everywhere or just on monsters... will update later)
Frequently Used Links
1. Monster Links - You can use these links to direct players to your battles without them spending any stamina.
Boss Monsters: "http://apps.facebook.com/castle_age/battle_monster.php?user=FBID&mpool=1"
Team Monsters: "http://apps.facebook.com/castle_age/battle_monster.php?user=FBID&mpool=2"
World Monsters: "http://apps.facebook.com/castle_age/battle_monster.php?user=FBID&mpool=3"
Lazy and need to post a monster link to your monster besides doing a CTA? Use the DSU Link Generator
2. Elite Guard Links - These links will allow you to join other's Elite Guard.
2b. Arena guard:
3. Keep Links - These will allow you to look at a players units, items, generals and land. If they are not in your army it will also allow you to duel or invade them. These are the thinks people use when they "bookmark" a player.
4. Friend Links - The first link can be used after accepting a friend request to join them to your army without sending them a gift. Use the second link if you want to remove a player from your army.
5. Accept Gift Link - Use this to accept a gift shown in Castle Age but not on your requests page
If someone leaves a message on your castle age wall you can check it with this link:
Link Structure Explained
1. Monster Link Structure
Monster links come if a few different flavors. The first as was mentioned earlier in this post simply takes you to a users monster, but what about those world monster or boss links? Using Cronus as an example.
Cronus - "http://apps.facebook.com/castle_age/battle_monster.php?twt2=hydra&user=FBID&action=doO bjective&mpool=3&lka=FBID&ref=nf"
As you can see by the example there is a lot more info here than in a simple monster link. Now let me break it down for you.
Looking at the first part of the link the first thing we see is:
If you notice it tells you what kind of monster twt2=hydra (Cronus) ; twt2=corc_4 (DTC), etc, and who &user=FBID (FBID) summoned it. This is useful information to make sure you are following the right link either in this forum or anywhere else besides your CA news feed. The twt= part can be safely removed, but the user=FBID is required so don't remove it.
Next "&action=doObjective" we see by the doObjective that if we click this link we will be using 1 stamina point. (you can remove &action=doObjective if you need to get to a monster without assisting on the siege weapon) As we get further you will see action= has a few more options.
Following doObjective is &mpool=3 This just tells us it is a world monster. You can look back up at the basic monster links to see if this number was 1 or 2 that if would be a boss or team monster. This is also an essential part of the link, don't remove it.
Last we have &lka=FBID&ref=nf - lka= will almost always be identical to user=FBID but can be changed to any value even to invalid ID numbers and can also be completely omitted with no apparent problems. ref= most likely a flag for internal documentation or link tracking, can be omitted with no apparent problems. (So basically this whole part can be removed with no effect on the link)
Since I have seen all the complaints about RTF links not fitting in the comments box I will address this issue. These are the only required parts needed for a return the favor links. These can also be used to share your monster on assist boards or among your friends.
These can be used on your monster link to directly spend a specific amount of stamina or energy on a monster.
NOTE: Posting these links in the forum and in assist groups will likely get you permanently banned and will not help your cause, so please only use the following for yourself.
Basic structure: "http://apps.facebook.com/castle_age/battle_monster.php?user=FBID&mpool=#&action=************Specific&attack_key=#"
Basic structure: "http://apps.facebook.com/castle_age/battle_monster.php?user=FBID&mpool=#&action=classSecondary&attack_key=#"
Now that you are armed with this knowledge you are set to interpret links, properly post links, and just have an easier time with Castle Age tasks.
Direct Gift Links & Navigation Links have been moved Here for space reasons
If you think I missed or need to add something please message me and I will try and update this guide.
NOTE: All these links were copied directly from Castle Age and may contain unnecessary pieces that I left intact for the sake of completeness.