All projects matching “postal country codes”

Check whether a postal / ZIP code is well-formed for a country (ISO 3166-1 alpha-2). A malformed code is a successful result with `valid:false`, not an error — only an unsupported country or empty code is a 400.

Postal code lookup via api.zippopotam.us (keyless). Country + postal → places (name/state/lat/lon).