diff --git a/src/Stratis.Features.Unity3dApi/Controllers/Unity3dController.cs b/src/Stratis.Features.Unity3dApi/Controllers/Unity3dController.cs
index a9cc196c89..97f028ccd1 100644
--- a/src/Stratis.Features.Unity3dApi/Controllers/Unity3dController.cs
+++ b/src/Stratis.Features.Unity3dApi/Controllers/Unity3dController.cs
@@ -187,7 +187,7 @@ public GetUTXOsResponseModel GetUTXOsForAddress([FromQuery] string address)
         /// <response code="400">Unexpected exception occurred</response>
         [Route("getaddressbalance")]
         [HttpGet]
-        [ProducesResponseType((int)HttpStatusCode.OK)]
+        [ProducesResponseType((int)HttpStatusCode.OK, Type = typeof(GetBalanceResponseModel))]
         [ProducesResponseType((int)HttpStatusCode.BadRequest)]
         public IActionResult GetAddressBalance(string address)
         {
@@ -304,10 +304,10 @@ public RawTxModel GetRawTransaction([FromQuery] string trxid)
         /// <response code="500">Request is null</response>
         [Route("send-transaction")]
         [HttpPost]
-        [ProducesResponseType((int)HttpStatusCode.OK)]
-        [ProducesResponseType((int)HttpStatusCode.BadRequest)]
-        [ProducesResponseType((int)HttpStatusCode.Forbidden)]
-        [ProducesResponseType((int)HttpStatusCode.InternalServerError)]
+        [ProducesResponseType((int)HttpStatusCode.OK, Type = typeof(WalletSendTransactionModel))]
+        [ProducesResponseType((int)HttpStatusCode.BadRequest, Type = typeof(ErrorResult))]
+        [ProducesResponseType((int)HttpStatusCode.Forbidden, Type = typeof(ErrorResult))]
+        [ProducesResponseType((int)HttpStatusCode.InternalServerError, Type = typeof(ErrorResult))]
         public async Task<IActionResult> SendTransactionAsync([FromBody] SendTransactionRequest request,
             CancellationToken cancellationToken = default(CancellationToken))
         {
@@ -521,9 +521,9 @@ public ReceiptResponse GetReceiptAPI([FromQuery] string txHash)
         /// <response code="500">Unable to deserialize method parameters</response>
         [Route("local-call")]
         [HttpPost]
-        [ProducesResponseType((int)HttpStatusCode.OK)]
-        [ProducesResponseType((int)HttpStatusCode.BadRequest)]
-        [ProducesResponseType((int)HttpStatusCode.InternalServerError)]
+        [ProducesResponseType((int)HttpStatusCode.OK, Type = typeof(ILocalExecutionResult))]
+        [ProducesResponseType((int)HttpStatusCode.BadRequest, Type = typeof(ErrorResult))]
+        [ProducesResponseType((int)HttpStatusCode.InternalServerError, Type = typeof(ErrorResult))]
         public IActionResult LocalCallSmartContractTransaction([FromBody] LocalCallContractRequest request)
         {
             if (!this.ModelState.IsValid)
diff --git a/src/Stratis.Features.Unity3dApi/Startup.cs b/src/Stratis.Features.Unity3dApi/Startup.cs
index 446a76afe0..b9aed389e3 100644
--- a/src/Stratis.Features.Unity3dApi/Startup.cs
+++ b/src/Stratis.Features.Unity3dApi/Startup.cs
@@ -8,6 +8,9 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using Microsoft.OpenApi.Any;
+using Microsoft.OpenApi.Models;
+using NBitcoin;
 using Newtonsoft.Json.Serialization;
 using Stratis.Bitcoin;
 using Stratis.Bitcoin.Features.Api;
@@ -128,7 +131,26 @@ public void ConfigureServices(IServiceCollection services)
             services.AddTransient<IConfigureOptions<SwaggerGenOptions>, ConfigureSwaggerOptions>();
 
             // Register the Swagger generator. This will use the options we injected just above.
-            services.AddSwaggerGen();
+            services.AddSwaggerGen(options => {
+                options.MapType(typeof(Money), () => new OpenApiSchema
+                {
+                    Type = "integer",
+                    Example = new OpenApiInteger(9999)
+                });
+
+                options.MapType(typeof(uint160), () => new OpenApiSchema
+                {
+                    Type = "string",
+                    Example = new OpenApiString("ffffffffffffffffffffffffffffffffffffffff")
+                });
+
+                options.MapType(typeof(uint256), () => new OpenApiSchema
+                {
+                    Type = "string",
+                    Example = new OpenApiString("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff")
+                });
+            });
+
             services.AddSwaggerGenNewtonsoftSupport(); // Use Newtonsoft JSON serializer with swagger. Needs to be placed after AddSwaggerGen()
 
             // Hack to be able to access and modify the options object