curl --request POST \
  --url https://api.klavis.ai/mcp-server/instance/set-auth \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "instanceId": "<string>",
  "authData": {
    "token": "<string>",
    "api_key": "<string>"
  }
}'

{
  "success": true,
  "message": "<string>"
}