Eldritch invocations

If there is a level prerequisite is it character level or warlock level for a multi class character?

I've always interpreted it as warlock level, not character level.  But that's my opinion, I haven't tried to find it in the rules.

The prerequisite is your level in the Warlock class. From the feature description:

If an eldritch invocation has prerequisites, you must meet them to learn it. You can learn the invocation at the same time that you meet its prerequisites. A level prerequisite refers to your level in this class.

Hope that helps!

Quote from Wilhelm92 >>

If there is a level prerequisite is it character level or warlock level for a multi class character?

 
Warlock level. Unless specifically stated: class features will be based on levels in that class, racial features and cantrips are character level.

EDIT: I probably should have refreshed the page before replying. 

Thank you all!

it will say some of them say warlock level if they dont its player level

Quote from asteroni >>

it will say some of them say warlock level if they dont its player level

 
Other way around.

Quote from Cyb3rM1nd >>

Quote from Wilhelm92 >>

If there is a level prerequisite is it character level or warlock level for a multi class character?

 
Warlock level. Unless specifically stated: class features will be based on levels in that class, racial features and cantrips are character level.

EDIT: I probably should have refreshed the page before replying. 

 Proficiency Bonus is also based on character level.