spendable 
Check how much you can spend
What
Spendable is a CLI app that interacts with your Mint account data to calculate how much money you're spending on average, and how much you should be spending to meet your budget.
It lets you take a more relaxed approach than the strictly-budgeted one that Mint pushes, giving you a monthly "pool" of spendable money that any spending subtracts from, so if you go a bit over-budget on food spending, for example, but counter it by shopping less, you can still meet your "spendable" goals.
How
$ npm install -g mint-spendable
$ spendable
Configuration
TK
Security
Spendable attempts to securely store your credentials in the local keychain. If that fails for whatever reason, they may get stored in the Configuration JSON file (see above).
Why
Until recently there was an app called LevelMoney that did this very well, but after being acquired they got shut down. This app started as a very simple, hacked-together script that attempted to provide a similar view of my spending, and when I found I had some free time recently on some long flights I decided to clean it up and make it a bit fancier.