Does anyone use a management "software" that has an API?

I am a Real Estate Agent and I run  a Marketing Company that helps Real Estate Investors, Agents and Brokers get access to leads as well as a marketing software that helps run comparables, verify leads and do skip tracing (find the owners).

There are quite a few different property management software companies that can help organize financials and provide a rent roll option. 

@Nitin John Abraham Try Cozy, its a property management software easy to use and powerful.

I expect to use the income from flips to grow my landlord portfolio but I realize I am about to generate taxes at a new and frightening pace and want to make sure I minimize the liability as much as legally possible by being set up correctly and using the right accounting software that will allow me to track multiple flips at the same time and account for rental income.

We've been using a software called Remo- allows you to have virtual round table discussions AND have a speaker as well. 

Also, With all the resorts and casinos in a position of uncertainty right now, who knows where rents and demand for long term rentals will go. 

@Timothy Douglas You would need software to aggregate the data.

I moved to Austin back in 2012 and I was making about $30k/yr at entry level marketing job at a software company back then.

@Brad Haughton  Although not in the same domain, there is a design principle called "Separation of concern" in the world of software engineering.