diff --git a/src/FilterLists.Agent/Features/Urls/BuildGitHubIssueBody.cs b/src/FilterLists.Agent/Features/Urls/BuildGitHubIssueBody.cs
new file mode 100644
index 000000000..0e3249b8c
--- /dev/null
+++ b/src/FilterLists.Agent/Features/Urls/BuildGitHubIssueBody.cs
@@ -0,0 +1,50 @@
+using System.Collections.Generic;
+using System.Text;
+using FilterLists.Agent.Features.Urls.Models.ValidationResults;
+using MediatR;
+
+namespace FilterLists.Agent.Features.Urls
+{
+    public static class BuildGitHubIssueBody
+    {
+        public class Command : IRequest<string>
+        {
+            public Command(IEnumerable<DataFileUrlValidationResults> dataFileUrlValidationResults)
+            {
+                DataFileUrlValidationResults = dataFileUrlValidationResults;
+            }
+
+            public IEnumerable<DataFileUrlValidationResults> DataFileUrlValidationResults { get; }
+        }
+
+        public class Handler : RequestHandler<Command, string>
+        {
+            private const string IssueHeader =
+                "<p>This issue is auto-generated by the [FilterLists.Agent](https://github.com/collinbarrett/FilterLists/tree/master/src/FilterLists.Agent). If it is still open at 9am UTC daily, it is updated around that time.</p><p>We rely on the help of the community to ensure that the FilterLists site data remains up-to-date. The URLs listed below have been automatically flagged and may [need to be updated](https://github.com/collinbarrett/FilterLists/tree/master/data). Please consider submitting a PR against this issue updating some or all of the URLs accordingly.</p><p>Thanks for your contributions!</p>";
+
+            protected override string Handle(Command request)
+            {
+                var body = new StringBuilder();
+                body.Append(IssueHeader);
+                foreach (var fileReults in request.DataFileUrlValidationResults)
+                {
+                    body.Append($"<h1>{fileReults.DataFileName}</h1>");
+                    body.Append("<ul>");
+                    foreach (var result in fileReults.Results)
+                    {
+                        body.Append($"<li>[{result.Url.AbsolutePath}]({result.Url.AbsolutePath})");
+                        body.Append("<ul>");
+                        foreach (var message in result.Messages)
+                            body.Append($"<li>{message}</li>");
+                        body.Append("</ul>");
+                        body.Append("</li>");
+                    }
+
+                    body.Append("</ul>");
+                }
+
+                return body.ToString();
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/FilterLists.Agent/Features/Urls/CreateOrUpdateGitHubIssue.cs b/src/FilterLists.Agent/Features/Urls/CreateOrUpdateGitHubIssue.cs
index bb4472d14..86054b8ce 100644
--- a/src/FilterLists.Agent/Features/Urls/CreateOrUpdateGitHubIssue.cs
+++ b/src/FilterLists.Agent/Features/Urls/CreateOrUpdateGitHubIssue.cs
@@ -27,16 +27,18 @@ public class Handler : AsyncRequestHandler<Command>
             private const string HelpWantedLabel = "help wanted";
             private const string IssueTitle = "Url Validation Errors";
             private readonly IAgentGitHubClient _gitHubClient;
+            private readonly IMediator _mediator;
 
-            public Handler(IAgentGitHubClient agentGitHubClient)
+            public Handler(IAgentGitHubClient agentGitHubClient, IMediator mediator)
             {
                 _gitHubClient = agentGitHubClient;
+                _mediator = mediator;
             }
 
             protected override async Task Handle(Command request, CancellationToken cancellationToken)
             {
                 var issue = await GetOpenIssueOrNull() ?? await CreateBaseIssue();
-                await UpdateIssue(issue);
+                await UpdateIssue(issue, request.DataFileUrlValidationResults, cancellationToken);
             }
 
             private async Task<Issue> GetOpenIssueOrNull()
@@ -56,15 +58,15 @@ private async Task<Issue> CreateBaseIssue()
                 return await _gitHubClient.CreateIssue(newIssue);
             }
 
-            private async Task UpdateIssue(Issue issue)
+            private async Task UpdateIssue(Issue issue,
+                IEnumerable<DataFileUrlValidationResults> dataFileUrlValidationResults,
+                CancellationToken cancellationToken)
             {
                 var updateIssue = issue.ToUpdate();
                 updateIssue.AddLabel(AgentBotLabel);
                 updateIssue.AddLabel(HelpWantedLabel);
-
-                //TODO: set real body from request
-                updateIssue.Body = "Testing update of auto-issue from FilterLists.Agent.";
-
+                updateIssue.Body = await _mediator.Send(new BuildGitHubIssueBody.Command(dataFileUrlValidationResults),
+                    cancellationToken);
                 await _gitHubClient.UpdateIssue(issue.Number, updateIssue);
             }
         }