Meet Mati, a startup that recently raised a $13.5 million Series A round to build a digital reputation API that could change the way you interact with online services. Mati uses an API-first approach and lets users seamlessly share pieces of their legal identity. Investors in today’s funding round include Tribe Capital with Arjun Sethi joining the board, Jerry Murdock from Insight Partners, Sima Gandhi who is the former head of business development and strategy at Plaid and Will Hockey, the CTO of Plaid. Mati isn’t just an ID verification…