To make life a bit easier, I’ve written this C# .NET Core Console application to sync the asset device names to the Asset Tag so it is visible in the HaloPSA portal.

The application loops through all the devices separately, so you might want to run it not too often to prevent rate limits.

In short: Install Visual Studio Community, create a .NET Core Project, install the using packages with the NuGet package manager, and replace the variables in Bold with your specific HaloPSA and API credentials.

You can also find the source on my github.

<strong>using System;
using System.Collections.Generic;
using System.Net.Http.Headers;
using System.Net.Http;
using System.Threading.Tasks;
using Newtonsoft.Json.Linq;
using Newtonsoft.Json;
using System.Linq;
using System.Text;
using System.Net;
using System.Xml.Linq;</strong>

namespace SyncAssetTag
{
    public class SyncAssetsTags
    {
        static HttpClient client = new HttpClient();

        static Token accessToken { get; set; }

        static string <strong>apiUrl = "https://instance.halopsa.com/api/";</strong>
        internal class Token
        {
            [JsonProperty("access_token")]
            public string AccessToken { get; set; }

            [JsonProperty("token_type")]
            public string TokenType { get; set; }

            [JsonProperty("expires_in")]
            public int ExpiresIn { get; set; }

            [JsonProperty("refresh_token")]
            public string RefreshToken { get; set; }
        }
        public static async Task GetToken()
        {
            string <strong>baseAddress = "https://instance.halopsa.com/auth/token";</strong>
            client = new HttpClient();
            var form = new Dictionary<string, string>
                {
                    <strong>{"grant_type", "client_credentials"},
                    {"client_id", ""},
                    {"client_secret", ""},
                    {"scope", "all"}</strong>
                };

            HttpResponseMessage tokenResponse = await client.PostAsync(baseAddress, new FormUrlEncodedContent(form));
            var jsonContent = await tokenResponse.Content.ReadAsStringAsync();
            Token tok = JsonConvert.DeserializeObject<Token>(jsonContent);
            accessToken = tok;
            client.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", tok.AccessToken);
        }

        [STAThread]
        static async Task Main()
        {
            Console.WriteLine($"Sync executed at: {DateTime.Now}");
            
            await GetToken();

            await SyncAssets();
            client.Dispose();
            return;
        }

        public static async Task<AssetRoot> GetAssetDetails(int id)
        {
            var response = await httphaloGetAsync("Asset/" + id);
            var asset = JsonConvert.DeserializeObject<AssetRoot>(response);
            return asset;
        }

        public static async Task<string> httphaloPostAsync(string api, JArray jArray)
        {

            HttpResponseMessage response = new HttpResponseMessage();
            try
            {
                response = await client.PostAsync(apiUrl + api, new StringContent(jArray.ToString(), Encoding.UTF8, "application/json"));
                response.EnsureSuccessStatusCode();
            }
            catch (Exception ex)
            {
                Console.WriteLine($"{ex.Message}" + "  -  " + jArray.ToString());
            }

            string result = await response.Content.ReadAsStringAsync();
            return result;
        }

        public static async Task SyncAssets()
        {
            var i = 1;
            var response = "";
            while (true)
            {
                response = await httpHaloGetPage("Asset", i);
                var assetlist = JsonConvert.DeserializeObject<Root>(response);

                if (assetlist.record_count == 0)
                {
                    break;
                }

                foreach (var asset in assetlist.assets)
                {
                    var assetdetails = await GetAssetDetails(asset.id);
                    if (assetdetails == null) { continue; }
                    if (assetdetails.fields == null) { continue; }

                    asset.fields = assetdetails.fields;

                    var assetname = "";

                    assetname = asset.fields.FirstOrDefault(p => p.name == "Name")?.value;
                    if (assetname == "" || assetname == null)
                    {
                        assetname = asset.fields.FirstOrDefault(p => p?.name == "device_name")?.value;
                    }
                    if (assetname == "" || assetname == null)
                    {
                        assetname = asset.fields.FirstOrDefault(p => p?.name == "longname")?.value;
                    }

                    if (assetname == null) { continue; }

                    if (!asset.inventory_number.Equals(asset.client_id + "\\" + assetname))
                    {
                        var jarray = new JArray();
                        var jobject = new JObject();
                        jobject["id"] = asset.id;
                        jobject["inventory_number"] = asset.client_id + "\\" + assetname;
                        jarray.Add(jobject);

                        await httphaloPostAsync("Asset", jarray);
                    }
                }
                i++;
            }
        }


        public static async Task<string> httphaloGetAsync(string api)
        {
            while (true)
            {
                string result = "";
                try
                {
                    HttpResponseMessage response = await client.GetAsync(apiUrl + api);
                    if (response.StatusCode == HttpStatusCode.TooManyRequests)
                    {
                        // Retry after the specified number of seconds
                        int retryAfterSeconds = 60;
                        await Task.Delay(retryAfterSeconds * 1000);
                        continue;
                    }

                    response.EnsureSuccessStatusCode();
                    result = await response.Content.ReadAsStringAsync();

                }
                catch (Exception ex)
                {
                    Console.WriteLine($"{ex.Message}");
                }
                return result;
            }
        }

        public static async Task<string> httpHaloGetPage(string api, int pagenumber)
        {
            var responseBody = await httphaloGetAsync(api + "?pageinate=true&page_size=50&page_no=" + pagenumber);
            return responseBody;
        }
    }

    // Root myDeserializedClass = JsonConvert.DeserializeObject<Root>(myJsonResponse);
    public class Asset
    {
        public List<Field> fields { get; set; }
        public int id { get; set; }
        public string inventory_number { get; set; }
        public string key_field { get; set; }
        public string key_field2 { get; set; }
        public string key_field3 { get; set; }
        public int client_id { get; set; }
        public string client_name { get; set; }
        public int site_id { get; set; }
        public string site_name { get; set; }
        public int business_owner_id { get; set; }
        public int business_owner_cab_id { get; set; }
        public int technical_owner_id { get; set; }
        public int technical_owner_cab_id { get; set; }
        public int assettype_id { get; set; }
        public string assettype_name { get; set; }
        public string colour { get; set; }
        public bool inactive { get; set; }
        public string contract_ref { get; set; }
        public int supplier_id { get; set; }
        public int supplier_contract_id { get; set; }
        public int supplier_sla_id { get; set; }
        public int supplier_priority_id { get; set; }
        public int itemstock_id { get; set; }
        public int item_id { get; set; }
        public bool non_consignable { get; set; }
        public int reserved_salesorder_id { get; set; }
        public int reserved_salesorder_line_id { get; set; }
        public string use { get; set; }
        public int device_number { get; set; }
        public int status_id { get; set; }
        public int third_party_id { get; set; }
        public int automate_id { get; set; }
        public int ninjarmm_id { get; set; }
        public int syncroid { get; set; }
        public string itglue_url { get; set; }
        public int defaultsequence { get; set; }
        public int datto_alternate_id { get; set; }
        public int snow_id { get; set; }
        public int passportal_id { get; set; }
        public string auvik_device_id { get; set; }
        public string datto_id { get; set; }
        public string addigy_id { get; set; }
        public int issue_consignment_line_id { get; set; }
        public string item_name { get; set; }
        public string datto_url { get; set; }
        public int ncentral_details_id { get; set; }
    }

    public class Root
    {
        public int page_no { get; set; }
        public int page_size { get; set; }
        public int record_count { get; set; }
        public List<Asset> assets { get; set; }
    }

    public class Field
    {
        public int id { get; set; }
        public string name { get; set; }
        public string validate { get; set; }
        public string value { get; set; }
        public string display { get; set; }
        public bool mandatory { get; set; }
        public bool showonactivity { get; set; }
        public int lookup { get; set; }
        public int systemuse { get; set; }
        public int parenttype_id { get; set; }
        public string url { get; set; }
        public int access_level { get; set; }
        public int typeinfo_id { get; set; }
        public int tab_id { get; set; }
        public string tab_name { get; set; }
        public int techdetail { get; set; }
        public int userdetail { get; set; }
    }

    public class AssetRoot
    {
        public int id { get; set; }
        public string inventory_number { get; set; }
        public string key_field { get; set; }
        public string key_field2 { get; set; }
        public string key_field3 { get; set; }
        public int client_id { get; set; }
        public string client_name { get; set; }
        public int site_id { get; set; }
        public string site_name { get; set; }
        public int business_owner_id { get; set; }
        public string business_owner_name { get; set; }
        public int business_owner_cab_id { get; set; }
        public int technical_owner_id { get; set; }
        public string technical_owner_name { get; set; }
        public int technical_owner_cab_id { get; set; }
        public int assettype_id { get; set; }
        public string assettype_name { get; set; }
        public string colour { get; set; }
        public bool inactive { get; set; }
        public string contract_ref { get; set; }
        public int supplier_id { get; set; }
        public string supplier_name { get; set; }
        public int supplier_contract_id { get; set; }
        public string supplier_contract_ref { get; set; }
        public int supplier_sla_id { get; set; }
        public int supplier_priority_id { get; set; }
        public List<Field> fields { get; set; }
        public List<object> customfields { get; set; }
        public List<object> custombuttons { get; set; }
        public int itemstock_id { get; set; }
        public int item_id { get; set; }
        public bool non_consignable { get; set; }
        public int reserved_salesorder_id { get; set; }
        public int reserved_salesorder_line_id { get; set; }
        public int sla_id { get; set; }
        public int priority_id { get; set; }
        public int contract_id { get; set; }
        public int goodsin_po_id { get; set; }
        public int commissioned { get; set; }
        public string intune_id { get; set; }
        public int prtg_id { get; set; }
        public int device42_id { get; set; }
        public string ateraid { get; set; }
        public string lansweeper_id { get; set; }
        public string lansweeper_url { get; set; }
        public DateTime dlastupdate { get; set; }
        public double item_cost { get; set; }
        public string itglue_id { get; set; }
        public bool bookmarked { get; set; }
        public string auvik_network_id { get; set; }
        public string qualys_id { get; set; }
        public string azureTenantId { get; set; }
        public string use { get; set; }
        public int device_number { get; set; }
        public int status_id { get; set; }
        public int third_party_id { get; set; }
        public int automate_id { get; set; }
        public int ninjarmm_id { get; set; }
        public int syncroid { get; set; }
        public string itglue_url { get; set; }
        public int datto_alternate_id { get; set; }
        public int snow_id { get; set; }
        public int passportal_id { get; set; }
        public string auvik_device_id { get; set; }
        public string datto_id { get; set; }
        public string addigy_id { get; set; }
        public int issue_consignment_line_id { get; set; }
        public string datto_url { get; set; }
        public int ncentral_details_id { get; set; }
    }
}Code language: PHP (php)