Api suddenly returns "nothing" for any call.

[linnsystems]

Api suddenly returns "nothing" for any call.

[neekfenwick]

When you say the API returns 'nothing' do you mean you get an empty array response like [], or a completely blank response body? It would help greatly if you showed the exact way you're calling the functions, with what arguments, and exactly what you get back.

I have found the API to have some really weird calling patterns, if you get the syntax slightly wrong it can just return zero results, then you fix one of the query parameters slightly, for example specify an ordering for the results, and it can start working. It's been a year or more since I worked against the API in much detail but here's some PHP code I wrote to call the API through my helper (which basically just uses GuzzleHttp, a standard HTTP request library, to send the request) as documented at https://apps.linnworks.net/Api/Method/Inventory-GetStockItemIdsBySKU:

$lw_api->genericAPICall('POST', 'api/Inventory/GetStockItemIdsBySKU',
        [ 'request' => '{
          "SKUS": [
            "' . $sku . '"
          ]
        }' ]);

I couldn't quite believe that's actually what the body has to look like, but there it is :) It's one of the weirder APIs I've worked with.