Check whether a traveler holding a given passport needs a visa, and what entry & transit requirements apply, for a destination country — with official government sources. Accepts ISO 3166-1 alpha-2 codes (e.g. "US", "KE") or common country names (e.g. "United States", "Kenya"). Returns a plain-language verdict, the specific requirements by severity, deduped official source links, and a deep link to the full EasyOnward analysis. Read-only and PII-free; the analysis is generic for any citizen of the passport country.

Resolve a country name (or an existing ISO 3166-1 alpha-2 code) to its uppercase ISO 3166-1 alpha-2 code — e.g. "Kenya" → "KE". Useful before calling check_visa. Returns an error if the name can't be resolved.