Vehicle registration plate from one or more countries

What it covers

Returns a realistic registration plate drawn from a mix of countries, each in that country's real format — its mask, national alphabet, region codes and reserved series. Pass `countries` as a comma-separated list of ISO codes (`?countries=pl,de,it`); omit it to draw from all 29 — the 27 EU member states plus the US and Canada. `type` is the **shared** plate category, not a national name: the countries call their kinds different things (`standard` vs `passenger`, `oldtimer` vs `vintage` vs `museum`), so `?type=historic` reaches all fifteen countries that issue a veteran plate and each record reports both its `category` and the `type` its own country uses. A `type` narrows the pool to the countries that issue it; combining it with a `countries` pool that cannot serve it is a 400 rather than a silent substitution. Each record also reports its `country` and, where the country has one, its `region` — which is load-bearing for the US and Canada, whose plates encode no jurisdiction. For a country's full record (era, district, individual part) and its own `format`, use that country’s endpoint.