UPDATE: There is an other way
I was just reminded of another way to connect to an custom Agar.io server. And it's so incredibly simple.
Navigate your browser to the normal Agar.io address, but add a query at the end of the url like so:
http://agar.io?[ip address here]
Please note that you should not enter the
ws:// prefix. Here is an example:
And you do not prefer to do so, you may use the updated bookmarklet:
Another more user friendly bookmarklet created by @E. Sundin. It's a jumble of text, but it works:
EDIT: This no longer works
This function was removed by the dev and this is now broken.
I will keep it here for reference.
The dev has also added a new game mode,
Party. With that you can connect with your friends. At the moment it only works with FFA rules.
Of course if you want to play Any of the other modes, again you can connect to the server via the country selection as the same time as your friend.
Actually, yes there is.
Paste this into the address bar while on the Agar.io website:
Now most browsers will remove the
security measure; you just need to go back there and add it.
It will prompt you for the server IP. Please don't add
ws:// at the
start, include the whole IP with the port number.
As well you can bookmarklet the JS code. You can easily bookmarklet
the code with my bookmarklet tool located here. For more on
bookmarklets, see here.
I would also like to mention something else. When you connect to the
server on a specified port you will not always be on the same game.
The second you connect to the port, the server selects a game with the
least amount of players from that port. If the all of the games from
that port is full, it will display an error and try a different
Connecting to a server this way is not reliable, especially if you
want to join the same game as your friends. It might cause you some
The only way around this I can see is to connect to the same
server at the same time hoping that the server will select the
same game for you and your friend. Of course this is not always the