diff --git a/src/ReC.Application/Common/Behaviors/HeaderQueryBehavior.cs b/src/ReC.Application/Common/Behaviors/HeaderQueryBehavior.cs
index 9199da0..8149416 100644
--- a/src/ReC.Application/Common/Behaviors/HeaderQueryBehavior.cs
+++ b/src/ReC.Application/Common/Behaviors/HeaderQueryBehavior.cs
@@ -1,14 +1,35 @@
 using MediatR;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Logging;
 using ReC.Application.Common.Dto;
+using ReC.Application.Common.Interfaces;
+using System.Text.Json;
 
 namespace ReC.Application.Common.Behaviors;
 
-public class HeaderQueryBehavior<TRecAction> : IPipelineBehavior<TRecAction, Unit>
+public class HeaderQueryBehavior<TRecAction>(IRecDbContext dbContext, ILogger<HeaderQueryBehavior<TRecAction>>? logger = null) : IPipelineBehavior<TRecAction, Unit>
     where TRecAction : RecActionDto
 {
-    public Task<Unit> Handle(TRecAction action, RequestHandlerDelegate<Unit> next, CancellationToken cancel)
+    public async Task<Unit> Handle(TRecAction action, RequestHandlerDelegate<Unit> next, CancellationToken cancel)
     {
-        // Logic to process the header query can be added here
-        throw new NotImplementedException("HeaderQueryBehavior is not implemented yet.");
+        if (action.HeaderQuery is null)
+            return await next(cancel);
+
+        var result = await dbContext.HeaderQueryResults.FromSqlRaw(action.HeaderQuery).FirstOrDefaultAsync(cancel);
+
+        if(result?.RawHeader is null)
+            return await next(cancel);
+
+        var headerDict = JsonSerializer.Deserialize<Dictionary<string, JsonElement>>(result.RawHeader);
+
+        if(headerDict is null)
+        {
+            logger?.LogWarning("Failed to deserialize header query result: {RawHeader}. Profile ID: {ProfileId}, Action ID: {ActionId}", result.RawHeader, action.ProfileId, action.ActionId);
+            return await next(cancel);
+        }
+
+        action.Headers = headerDict.ToDictionary(header => header.Key, kvp => kvp.Value.ToString());
+
+        return await next(cancel);
     }
 }