Recover your API key from the TourSolver Back-Office:
Connect to TourSolver back office.
Click on the account icon in the right up corner
Click My subscription
Click the Copy icon to recover the API key
Cautionif you send to many requests in a short time, you may receive a 429 http code.
When it happens, that means that your request as not been treated, you will have to send it again later.