Visa requirements / passport visa lookup / visa-free travel checker / e-visa + visa-on-arrival lookup / passport-index / travel eligibility / Schengen + ESTA-style entry rules. Given a passport country and destination, returns whether entry is visa-free, e-visa, visa-on-arrival, or visa-required, plus permitted stay in days and a human-readable status string. Pass full_matrix to get the entire 200x200 visa matrix for the passport. Backed by the public CC-BY passport-index-dataset.