error "No route found for \"GET /api/orders\"" for the Postman request with HTTP Basic auth

If I try a request with GET https://myserver/api/v3/search/order I only get status “404” with “Nor route found for “GET /api/v3/search/orders””,

My goal is to get a list of all orders via the REST-API-Call. The docu isn’t right readable for me. All the example gives me “No route…” back

getting the access token via request is simple right working with my PHP snippet and with postman, too. Any tips or ideas whats wrong and how to solve. Example request with json data is welcome. Thanks.