Mercedes-Benz vs RevCarData

Mercedes-Benz's connected-vehicle API platform exposes telematics data, remote vehicle commands, a car configurator, and dealer-locator lookups behind an OAuth2 client-credentials/authorization-code flow — its own docs describe exchanging a Base64-encoded Client ID/Secret for a bearer token, correcting the stored auth from "API Key" to "OAuth". A live unauthenticated GET against the real api.mercedes-benz.com gateway returned no Access-Control-Allow-Origin header on any endpoint tested, reconfirming cors "no" — consistent with Mercedes-Benz's own documentation that the API doesn't support direct browser calls; https was reconfirmed. The platform offers a free sandbox/BYOCAR tier for testing against simulated and real vehicles, plus paid production tiers per API product — freemium.

RevCarData is a global Year-Make-Model-Trim vehicle database covering EU, US, and Asian markets, exposing 38 structured spec fields — MSRP, powertrain, dimensions, and EV/battery metrics — via a REST API and CSV export. A live GET against its real API host, api.revcardata.com/api/v1/vehicles, returned a 401 "Missing X-API-Key header" error carrying access-control-allow-origin echoing the request Origin — reconfirming auth "API Key" and cors "yes" — over HTTPS. Its site offers a free sign-up-and-get-a-key tier alongside paid plans for higher volume — freemium.