One key, one base URL, and your first call

Create a key on your account page; it is shown once, so keep it then. Send it as a bearer token to https://api.truckaurbus.com/v1 and everything answers JSON. A key starts on the free tier with no card: 50 calls a day, 10 a minute.

Every response carries its rate-limit headers, so your own code can see what it has used rather than discovering the ceiling by hitting it. Every response also carries an attribution header with the exact text a free-tier app should show.

Languages are en, hi and ta throughout, so a page you build can speak the language your reader already chose rather than the one the data happened to arrive in.