Required Real Estate license in C.R

Since your anticipated participation in the Costa Rican real estate market would be in direct competition with native agents, it would be a violation of the terms of your tourist visa and your temporary residency. In short, a non-Costa Rican cannot compete for employment with a Costa Rican citizen. The only exception would be if you bring unique skills not found in the local employment pool and if you can then get a work permit. That's highly unlikely.

as of this date there is no license for real estate agents

many lawyers, accountants, engineers, architects (especially those who work as appraisers) are licensed

you can see info on angela jimenez rocha licensed appraiser in costa rica on the site orbitcostarica