i have a big problem with CS-Cart API. In particular if i use a external tool (for example trackingmore or orderhive) i can't sync my website with this services (unfortnely error not displaying).
There is a particular server config or cs-cart config that blocking use of api from externale services?
Then either credentials or permissions are incorrect for the request.
Have you tried something simple like a list orders? Suggest you do this with a tool active where you can monitor the request/resposne to see what's happening. There's not enough info in what you've provided to really help.
[error] 29254#0: *99568 "/var/www/vhosts/mywebsite/httpdocs/api/orders/index.html" is not found (2: No such file or directory), client: xxx.xxx.xxx.xxx, server: mywesite, request: "GET /api/orders/ HTTP/1.1", host: