This morning Codat, a startup that provides APIs to link small-business fintech data to external services, announced that it has closed a $40 million round led by Tiger Global. The company raised $10 million in a Series A around a year ago that Index led; Codat also raised some strategic capital in the interim, but declined in an interview to provide more detail. The company also declined to provide any guidance regarding how much its valuation changed in the last year between lettered rounds. That Codat managed to raise more…