diff --git a/src/server/ApiKeyMiddleware.cs b/src/server/ApiKeyMiddleware.cs
new file mode 100644
index 0000000..81ef5a2
--- /dev/null
+++ b/src/server/ApiKeyMiddleware.cs
@@ -0,0 +1,37 @@
+using Microsoft.Extensions.Primitives;
+
+namespace server;
+
+public class ApiKeyMiddleware
+{
+    private readonly RequestDelegate _next;
+    private readonly IConfiguration _configuration;
+
+    public ApiKeyMiddleware(RequestDelegate next, IConfiguration configuration)
+    {
+        _next = next;
+        _configuration = configuration;
+    }
+
+    public async Task InvokeAsync(HttpContext context)
+    {
+        if (!context.Request.Headers.TryGetValue("X-API-KEY", out StringValues extractedApiKey))
+        {
+            context.Response.StatusCode = 401;
+            await context.Response.WriteAsync("API Key is missing.");
+            return;
+        }
+
+        var validApiKeys = _configuration.GetSection("Embeddingsearch").GetSection("ApiKeys").Get<List<string>>();
+        #pragma warning disable CS8604
+        if (validApiKeys == null || !validApiKeys.Contains(extractedApiKey)) // CS8604 extractedApiKey is not null here, but the compiler still thinks that it might be.
+        {
+            context.Response.StatusCode = 403;
+            await context.Response.WriteAsync("Invalid API Key.");
+            return;
+        }
+        #pragma warning restore CS8604
+
+        await _next(context);
+    }
+}
\ No newline at end of file
diff --git a/src/server/Controllers/EntityController.cs b/src/server/Controllers/EntityController.cs
new file mode 100644
index 0000000..528c5bb
--- /dev/null
+++ b/src/server/Controllers/EntityController.cs
@@ -0,0 +1,102 @@
+using Microsoft.AspNetCore.Mvc;
+using embeddingsearch;
+using System.Text.Json;
+using server.Models;
+
+namespace server.Controllers;
+
+[ApiController]
+[Route("[controller]")]
+public class EntityController : ControllerBase
+{
+    private readonly ILogger<EntityController> _logger;
+    private readonly IConfiguration _config;
+    private SearchomainManager _domainManager;
+
+    public EntityController(ILogger<EntityController> logger, IConfiguration config, SearchomainManager domainManager)
+    {
+        _logger = logger;
+        _config = config;
+        _domainManager = domainManager;
+    }
+
+    [HttpGet("Query")]
+    public ActionResult<EntityQueryResults> Query(string searchdomain, string query)
+    {
+        Searchdomain searchdomain_ = _domainManager.GetSearchdomain(searchdomain);
+        var results = searchdomain_.Search(query);
+        List<EntityQueryResult> queryResults = [.. results.Select(r => new EntityQueryResult
+        {
+            Name = r.Item2,
+            Value = r.Item1
+        })];
+        return Ok(new EntityQueryResults(){Results = queryResults});
+    }
+
+    [HttpGet("Index")]
+    public ActionResult<EntityIndexResult> Index(string searchdomain, string jsonEntity)
+    {
+        Searchdomain searchdomain_ = _domainManager.GetSearchdomain(searchdomain);
+        List<JSONEntity>? jsonEntities = JsonSerializer.Deserialize<List<JSONEntity>?>(jsonEntity);
+        if (jsonEntities is not null)
+        {
+            
+            List<Entity>? entities = searchdomain_.EntitiesFromJSON(jsonEntity);
+            if (entities is not null)
+            {
+                return new EntityIndexResult() {Success = true};
+            }
+            else
+            {
+                _logger.LogDebug("Unable to deserialize an entity");
+            }
+        }
+        return new EntityIndexResult() {Success = false};
+    }
+
+    [HttpGet("List")]
+    public ActionResult<EntityListResults> List(string searchdomain)
+    {
+        EntityListResults entityListResults = new() {Results = []};
+        Searchdomain searchdomain_ = _domainManager.GetSearchdomain(searchdomain);
+        foreach (Entity entity in searchdomain_.entityCache)
+        {
+            List<AttributeResult> attributeResults = [];
+            foreach (KeyValuePair<string, string> attribute in entity.attributes)
+            {
+                attributeResults.Add(new AttributeResult() {Name = attribute.Key, Value = attribute.Value});
+            }
+            List<DatapointResult> datapointResults = [];
+            foreach (Datapoint datapoint in entity.datapoints)
+            {
+                List<EmbeddingResult> embeddingResults = [];
+                foreach ((string, float[]) embedding in datapoint.embeddings)
+                {
+                    embeddingResults.Add(new EmbeddingResult() {Model = embedding.Item1, Embeddings = embedding.Item2});
+                }
+                datapointResults.Add(new DatapointResult() {Name = datapoint.name, ProbMethod = datapoint.probMethod.Method.Name, Embeddings = embeddingResults});
+            }
+            EntityListResult entityListResult = new()
+            {
+                Name = entity.name,
+                Attributes = attributeResults,
+                Datapoints = datapointResults
+            };
+            entityListResults.Results.Add(entityListResult);
+        }
+        return entityListResults;
+    }
+
+    [HttpGet("Delete")]
+    public ActionResult<EntityDeleteResults> Delete(string searchdomain, string entity) // TODO test this
+    {
+        Searchdomain searchdomain_ = _domainManager.GetSearchdomain(searchdomain);
+        Entity? entity_ = searchdomain_.GetEntity(entity);
+        if (entity_ is null)
+        {
+            return new EntityDeleteResults() {Success = false};
+        }
+        searchdomain_.DatabaseRemoveEntity(entity);
+        return new EntityDeleteResults() {Success = true};
+    }
+}
diff --git a/src/server/Controllers/SearchdomainController.cs b/src/server/Controllers/SearchdomainController.cs
new file mode 100644
index 0000000..5f2d1d0
--- /dev/null
+++ b/src/server/Controllers/SearchdomainController.cs
@@ -0,0 +1,64 @@
+using Microsoft.AspNetCore.Mvc;
+using embeddingsearch;
+using server.Models;
+
+namespace server.Controllers;
+
+[ApiController]
+[Route("[controller]")]
+public class SearchdomainController : ControllerBase
+{
+    private readonly ILogger<SearchdomainController> _logger;
+    private readonly IConfiguration _config;
+    private SearchomainManager _domainManager;
+
+    public SearchdomainController(ILogger<SearchdomainController> logger, IConfiguration config, SearchomainManager domainManager)
+    {
+        _logger = logger;
+        _config = config;
+        _domainManager = domainManager;
+    }
+
+    [HttpGet("List")]
+    public ActionResult<SearchdomainListResults> List()
+    {
+        return Ok(_domainManager.ListSearchdomains());
+    }
+
+    [HttpGet("Create")]
+    public ActionResult<SearchdomainCreateResults> Create(string searchdomain, string settings = "{}")
+    {
+        return Ok(new SearchdomainCreateResults(){Id = _domainManager.CreateSearchdomain(searchdomain, settings)});
+    }
+
+    [HttpGet("Delete")]
+    public ActionResult<SearchdomainDeleteResults> Delete(string searchdomain)
+    {
+        bool success;
+        int deletedEntries;
+        try
+        {
+            success = true;
+            deletedEntries = _domainManager.DeleteSearchdomain(searchdomain);
+        } catch (Exception)
+        {
+            success = false;
+            deletedEntries = 0;
+        }
+        return Ok(new SearchdomainDeleteResults(){Success = success, DeletedEntities = deletedEntries});
+    }
+
+    [HttpGet("Update")]
+    public ActionResult<SearchdomainUpdateResults> Update(string searchdomain, string newName, string settings = "{}")
+    {
+        Searchdomain searchdomain_ = _domainManager.GetSearchdomain(searchdomain);
+        Dictionary<string, dynamic> parameters = new()
+        {
+            {"name", newName},
+            {"settings", settings},
+            {"id", searchdomain_.id}
+        };
+        searchdomain_.ExecuteSQLNonQuery("UPDATE searchdomain set name = @name, settings = @settings WHERE id = @id", parameters);
+        return Ok(new SearchdomainUpdateResults(){Success = true});
+    }
+}
diff --git a/src/server/Models/EntityModels.cs b/src/server/Models/EntityModels.cs
new file mode 100644
index 0000000..573bf8d
--- /dev/null
+++ b/src/server/Models/EntityModels.cs
@@ -0,0 +1,55 @@
+namespace server.Models;
+
+
+public class EntityQueryResults
+{
+    public required List<EntityQueryResult> Results { get; set; }
+}
+
+public class EntityQueryResult
+{
+    public required string Name { get; set; }
+    public float Value { get; set; }
+}
+
+public class EntityIndexResult
+{
+    public required bool Success { get; set; }
+}
+
+public class EntityListResults
+{
+    public required List<EntityListResult> Results { get; set; }
+}
+
+public class EntityListResult
+{
+    public required string Name { get; set; }
+    public required List<AttributeResult> Attributes { get; set; }
+    public required List<DatapointResult> Datapoints { get; set; }
+}
+
+public class AttributeResult
+{
+    public required string Name { get; set; }
+    public required string Value { get; set; }
+}
+
+public class DatapointResult
+{
+    public required string Name { get; set; }
+    public required string ProbMethod { get; set; }
+    public required List<EmbeddingResult> Embeddings { get; set; } 
+}
+
+public class EmbeddingResult
+{
+    public required string Model { get; set; }
+    public required float[] Embeddings { get; set; }
+}
+
+public class EntityDeleteResults
+{
+    public required bool Success { get; set; }
+}
+
diff --git a/src/server/Models/SearchdomainModels.cs b/src/server/Models/SearchdomainModels.cs
new file mode 100644
index 0000000..fe88c4f
--- /dev/null
+++ b/src/server/Models/SearchdomainModels.cs
@@ -0,0 +1,24 @@
+namespace server.Models
+{
+    public class SearchdomainListResults
+    {
+        public required List<string> Searchdomains { get; set; }
+    }
+
+    public class SearchdomainCreateResults
+    {
+        public required int Id { get; set; }
+    }
+
+    public class SearchdomainUpdateResults
+    {
+        public required bool Success { get; set; }
+    }
+
+    public class SearchdomainDeleteResults
+    {
+        public required bool Success { get; set; }
+        public required int DeletedEntities { get; set; }
+    }
+
+}
diff --git a/src/server/Program.cs b/src/server/Program.cs
new file mode 100644
index 0000000..d4681c7
--- /dev/null
+++ b/src/server/Program.cs
@@ -0,0 +1,31 @@
+using server;
+
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+
+builder.Services.AddControllers();
+// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
+builder.Services.AddEndpointsApiExplorer();
+builder.Services.AddSwaggerGen();
+
+builder.Services.AddSingleton<SearchomainManager>();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+else
+{
+    app.UseMiddleware<ApiKeyMiddleware>();
+}
+
+app.UseAuthorization();
+
+app.MapControllers();
+
+app.Run();
diff --git a/src/server/SearchdomainManager.cs b/src/server/SearchdomainManager.cs
new file mode 100644
index 0000000..c14666c
--- /dev/null
+++ b/src/server/SearchdomainManager.cs
@@ -0,0 +1,116 @@
+using embeddingsearch;
+using MySql.Data.MySqlClient;
+using System.Data.Common;
+using OllamaSharp;
+
+namespace server;
+
+public class SearchomainManager
+{
+    private Dictionary<string, Searchdomain> searchdomains = [];
+    private readonly ILogger<SearchomainManager> _logger;
+    private readonly IConfiguration _config;
+    private readonly string ollamaURL;
+    private readonly string connectionString;
+    private OllamaApiClient client;
+    private MySqlConnection connection;
+
+    public SearchomainManager(ILogger<SearchomainManager> logger, IConfiguration config)
+    {
+        _logger = logger;
+        _config = config;
+        ollamaURL = _config.GetSection("Embeddingsearch")["OllamaURL"] ?? "";
+        connectionString = _config.GetSection("Embeddingsearch").GetConnectionString("SQL") ?? "";
+        client = new(new Uri(ollamaURL));
+        connection = new MySqlConnection(connectionString);
+        connection.Open();
+    }
+
+    public Searchdomain GetSearchdomain(string searchdomain)
+    {
+        if (searchdomains.TryGetValue(searchdomain, out Searchdomain? value))
+        {
+            return value;
+        }
+        try
+        {
+            return SetSearchdomain(searchdomain, new Searchdomain(searchdomain, connectionString, client));
+        } catch (MySqlException)
+        {
+            _logger.LogError("Unable to find the searchdomain {searchdomain}", searchdomain);
+            throw new Exception($"Unable to find the searchdomain {searchdomain}");
+        }
+    }
+
+    public List<string> ListSearchdomains()
+    {
+        DbDataReader reader = ExecuteSQLCommand("SELECT name FROM searchdomain", []);
+        List<string> results = [];
+        while (reader.Read())
+        {
+            results.Add(reader.GetString(0));
+        }
+        reader.Close();
+        return results;
+    }
+
+    public int CreateSearchdomain(string searchdomain, string settings = "{}")
+    {
+        Dictionary<string, dynamic> parameters = new()
+        {
+            { "name", searchdomain },
+            { "settings", settings}
+        };
+        return ExecuteSQLCommandGetInsertedID("INSERT INTO searchdomain (name, settings) VALUES (@name, @settings)", parameters);
+    }
+
+    public int DeleteSearchdomain(string searchdomain)
+    {
+        Searchdomain searchdomain_ = GetSearchdomain(searchdomain);
+        int counter = 0;
+        foreach (Entity entity in searchdomain_.entityCache)
+        {
+            searchdomain_.DatabaseRemoveEntity(entity.name);
+            counter += 1;
+        }
+        _logger.LogDebug($"Number of entities deleted as part of deleting the searchdomain \"{searchdomain}\": {counter}");
+        searchdomain_.ExecuteSQLNonQuery("DELETE FROM entity WHERE id_searchdomain = @id", new() {{"id", searchdomain_.id}}); // Cleanup // TODO add rows affected
+        searchdomain_.ExecuteSQLNonQuery("DELETE FROM searchdomain WHERE name = @name", new() {{"name", searchdomain}});
+        searchdomains.Remove(searchdomain);
+        _logger.LogDebug($"Searchdomain has been successfully removed");
+        return counter;
+    }
+
+    public DbDataReader ExecuteSQLCommand(string query, Dictionary<string, dynamic> parameters)
+    {
+        using MySqlCommand command = connection.CreateCommand();
+        command.CommandText = query;
+        foreach (KeyValuePair<string, dynamic> parameter in parameters)
+        {
+            command.Parameters.AddWithValue($"@{parameter.Key}", parameter.Value);
+        }
+        return command.ExecuteReader();
+    }
+
+    public int ExecuteSQLCommandGetInsertedID(string query, Dictionary<string, dynamic> parameters)
+    {
+        using MySqlCommand command = connection.CreateCommand();
+
+        command.CommandText = query;
+        foreach (KeyValuePair<string, dynamic> parameter in parameters)
+        {
+            command.Parameters.AddWithValue($"@{parameter.Key}", parameter.Value);
+        }
+        command.ExecuteNonQuery();
+        command.CommandText = "SELECT LAST_INSERT_ID();";
+        return Convert.ToInt32(command.ExecuteScalar());
+    }
+
+    private Searchdomain SetSearchdomain(string name, Searchdomain searchdomain)
+    {
+        searchdomains[name] = searchdomain;
+        return searchdomain;
+    }
+
+
+}
diff --git a/src/server/appsettings.json b/src/server/appsettings.json
new file mode 100644
index 0000000..4d56694
--- /dev/null
+++ b/src/server/appsettings.json
@@ -0,0 +1,9 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}
diff --git a/src/server/server.csproj b/src/server/server.csproj
new file mode 100644
index 0000000..4b546bb
--- /dev/null
+++ b/src/server/server.csproj
@@ -0,0 +1,17 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Swashbuckle.AspNetCore" Version="6.6.2" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\embeddingsearch\embeddingsearch.csproj" />
+  </ItemGroup>
+
+</Project>