here is my request:

Final AJAX Request: {
  "url": "/meta/proxy/api-ch-gva-2.exoscale.com/v2/zone",
  "method": "GET",
  "dataType": "json",
  "headers": {
    "Authorization": "EXO2-HMAC-SHA256 credential=EXO5xxxxxxx,expires=1743686273,signature=lnMuRf6rQhZqoeXxxxxxxxxx/LxBAGMJn8Vco="
  }
}

I'm going well to the proxy and hit the right exoscale endpoint

<http://api-ch-gva-2.exoscale.com/v2/zone|api-ch-gva-2.exoscale.com/v2/zone>

Sounds the 401 come from the proxy because no log on our side I do not receive the request on the exoscale side

I did it thanks, the issue was Authorization was wrong key in header and need X-API-Auth-Header