The new programme will allow developers to build custom tools for social marketers to meet their goals.
LinkedIn's ad self-service platform currently has 187 million members with close to 3 billion monthly page views.
The highly requested feature will enable these companies to increase brand awareness, drive leads and automate campaign creation on the company's platform.
LinkedIn aims for the programme to give confidence to companies who want to make sure their marketing investments are "effective, targeted and measurable."
Social media marketing firms, like Adobe, Bizo and Unified, have partnered with LinkedIn and can already build and add their LinkedIn ad capabilities to their own platforms.
Linkedin has made the majority of its revenue from recruitment based products, but the company's new offering opens the door for LinkedIn to make big bucks from advertising.
The company made $138.4m in revenue from its Talent solutions products, a dramatic increase of 95% compared to Q3 2011.
Revenue from talent solutions accounted for 55% of total revenue for the quarter.
LinkedIn's marketing solutions products totalled $64m, representing 25% of total revenue in the third quarter of 2012.
LinkedIn's projects its revenue for Q4 2012 to range between $270m to $275m with stock based compensation to range from $28m to $30m.