The best way to currently check your difficulty bracket: Run Dota2 and open watch tab Select
Recent games Press Filter button Write your nickname Select skill level (low, mid or high) This way you can see which of your recent games have been in low, mid or high skill bracket.
Keep in mind that the high bracket still varies in skill greatly, so that might not be a a very accurate indication of your current ladder standing.
gaming.stackexchange.com/users/14874/JBeurer
Valve has integrated a ranking system now You can see your ranking after 1 match played in those categories (solo/team).
Getting the information: (This no longer works) After you have played 1 match you can open the ingame console and type the following: developer 1 dota_game_account_debug
The console will give you all your profile information including: Teamranking competitive_rank: and solo_competitive_rank:
Furthermore there is information how stable your ranking is: competitive_rank_uncertainty:
solo_competitive_rank_uncertainty:
Those get lower the more matches you play.
It increases the accuracy of the rank.
Comparing: 5% 110010% 150025% 200050% 225075% 273190% 320095% 390099% 4100
This table is the official from http://blog.dota2.com/2013/12/matchmaking/
How to read: 95% means that you are better/have a better ranking then 95% of all other players.
Basically it tells you that you are in the top 5% of all players.
However, this table is based on normal matchmaking for now.
Valve expects that this table will adjust with more data from ranking match (thx for pointing that out decency)
gaming.stackexchange.com/users/20751/Wandang
According to sources , the way to do it is: To check your current "ranking" you must first enable the console (which you should either know how to do or know how to google).
Then then launch game, open console and type these commands developer 1
dota_game_account_debug
i think that's the proper way to check your MMR atm.
dont forget to disable developer after you check it, since the developer mode will make u see red text
in-game However, this has been patched out, apparently.
Therefore it's no longer possible. :(
Follow up: Rank = mmr
If you picked veteran, you start at 3000 MMR.
It seems if you picked something else you start lower.
Rank uncertainty =
some kind of K factor used in determining your new MMR's after games.
gaming.stackexchange.com/users/17866/Simon
Dota 2 uses an MMR(Matchmaking Rating) system to match players.
Each player is assigned a number to represent their skill level and players are matched to people with similar MMRs.
While these were previously grouped into brackets for spectating, there are any real brackets in Dota 2.
Normally, your MMR is hidden, but in December 2013, Valve added a ranked mode.
After reaching level 13, you can play Ranked Mode to get a separate, visible MMR after 10 calibration games.
You can then view this MMR on your profile:
Currently, the average MMR is about 2250, with pro players around 5000, but this is likely to change somewhat.
gaming.stackexchange.com/users/118/Ullallulloo
You can't.
Valve is iteratively taking out all of the possible ways people have used in the past to judge a person's skill.
Currently I'm not aware of any ways and if there are any new ways discovered they will presumably be quickly removed, just as those in the past have been.
If and when Valve decides to add a public skill ranking system, you'll know.
gaming.stackexchange.com/users/11047/Decency
It's been removed to stop people being elitist over their "skill" level.
I think the only way to do it now is is through the Dota2 Web Api, you'll need some programming skills to do it.
You can also look at www.
Pubstats.me - this will show you your % of games above the normal bracket, but you'll not be able to see the bracket of individual games.
gaming.stackexchange.com/users/43914/patchandthat
Supposedly DOTA 2 matchmaking is divided into brackets.  I want to know which difficulty bracket I'm in. How can I find this information?
Where can I check which difficulty bracket I'm in?
gaming.stackexchange.com
<dota-2>
gaming.stackexchange.com/questions/45826
gaming.stackexchange.com/users/14874/JBeurer
Valve has an integrated ranking system. After level 13, you can play Ranked Mode. While the answer might not be clear, it seems that the players point out the fact that the client offers the option to check your rank. 
The community points a client update that adds the option to check ones rank. Few people seem to be unaware of a way to validate their rank.