diff --git a/src/ZB.MOM.WW.ScadaBridge.Commons/Messages/Audit/SiteCallQueries.cs b/src/ZB.MOM.WW.ScadaBridge.Commons/Messages/Audit/SiteCallQueries.cs
index 96448775..e424c60e 100644
--- a/src/ZB.MOM.WW.ScadaBridge.Commons/Messages/Audit/SiteCallQueries.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.Commons/Messages/Audit/SiteCallQueries.cs
@@ -22,6 +22,11 @@ namespace ZB.MOM.WW.ScadaBridge.Commons.Messages.Audit;
 /// Requested page size. The actor clamps this to the <c>[1, 200]</c> range, so
 /// the effective ceiling is 200 rows per page regardless of the value sent.
 /// </param>
+/// <param name="TrackedOperationIdFilter">
+/// Exact-match on one operation (the <c>?correlationId=</c> deep link from the
+/// Flow Debugger / Audit Log); <c>null</c> = no filter. Additive, trailing
+/// optional so existing positional callers are unaffected.
+/// </param>
 public sealed record SiteCallQueryRequest(
     string CorrelationId,
     string? StatusFilter,
@@ -34,7 +39,8 @@ public sealed record SiteCallQueryRequest(
     DateTime? AfterCreatedAtUtc,
     Guid? AfterId,
     int PageSize,
-    string? SourceNodeFilter = null);
+    string? SourceNodeFilter = null,
+    Guid? TrackedOperationIdFilter = null);
 
 /// <summary>
 /// A single <c>SiteCalls</c> row summarised for the Site Calls UI grid. Carries
diff --git a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Audit/SiteCallQueryFilter.cs b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Audit/SiteCallQueryFilter.cs
index 82d37a57..3258b929 100644
--- a/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Audit/SiteCallQueryFilter.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.Commons/Types/Audit/SiteCallQueryFilter.cs
@@ -31,6 +31,12 @@ namespace ZB.MOM.WW.ScadaBridge.Commons.Types.Audit;
 /// <c>"site-plant-a-node-a"</c>). Exact match; <c>null</c> means "do not
 /// constrain". Rows with NULL <c>SourceNode</c> are excluded when set.
 /// </param>
+/// <param name="TrackedOperationId">
+/// Restrict to exactly one cached call by its primary key — the
+/// <c>?correlationId=</c> deep link from the Flow Debugger / Audit Log.
+/// <c>null</c> means "do not constrain". AND-combined with every other field,
+/// so a mismatching <see cref="SourceSite"/> (etc.) still yields no rows.
+/// </param>
 public sealed record SiteCallQueryFilter(
     string? Channel = null,
     string? SourceSite = null,
@@ -39,4 +45,5 @@ public sealed record SiteCallQueryFilter(
     DateTime? FromUtc = null,
     DateTime? ToUtc = null,
     DateTime? StuckCutoffUtc = null,
-    string? SourceNode = null);
+    string? SourceNode = null,
+    Guid? TrackedOperationId = null);
diff --git a/src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/SiteCallAuditRepository.cs b/src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/SiteCallAuditRepository.cs
index de37235c..19d9f1ea 100644
--- a/src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/SiteCallAuditRepository.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Repositories/SiteCallAuditRepository.cs
@@ -294,6 +294,12 @@ WHERE TrackedOperationId = @Id
         var fromUtc = filter.FromUtc;
         var toUtc = filter.ToUtc;
         var stuckCutoff = filter.StuckCutoffUtc;
+        // TrackedOperationId is a varchar(36) column holding the "D"-format GUID
+        // string (see SiteCallEntityTypeConfiguration), so the exact-match filter
+        // is compared as a string — same shape as the @AfterId cursor below. A
+        // uniqueidentifier parameter would make SQL Server convert the COLUMN side
+        // (higher type precedence) and lose the PK seek.
+        var trackedOperationIdString = filter.TrackedOperationId?.ToString("D");
 
         // The stuck predicate (TerminalAtUtc IS NULL AND CreatedAtUtc < cutoff)
         // is pushed into SQL here — both columns are plain (no value converter)
@@ -315,6 +321,7 @@ WHERE (@Channel IS NULL OR Channel = @Channel)
   AND (@SourceNode IS NULL OR SourceNode = @SourceNode)
   AND (@Status IS NULL OR Status = @Status)
   AND (@Target IS NULL OR Target = @Target)
+  AND (@TrackedOperationId IS NULL OR TrackedOperationId = @TrackedOperationId)
   AND (@FromUtc IS NULL OR CreatedAtUtc >= @FromUtc)
   AND (@ToUtc IS NULL OR CreatedAtUtc <= @ToUtc)
   AND (@StuckCutoff IS NULL OR (TerminalAtUtc IS NULL AND CreatedAtUtc < @StuckCutoff))
@@ -338,6 +345,7 @@ OPTION (RECOMPILE);";
             Param("@SourceNode", SqlDbType.VarChar, filter.SourceNode),
             Param("@Status", SqlDbType.VarChar, filter.Status),
             Param("@Target", SqlDbType.VarChar, filter.Target),
+            Param("@TrackedOperationId", SqlDbType.VarChar, trackedOperationIdString),
             Param("@FromUtc", SqlDbType.DateTime2, fromUtc),
             Param("@ToUtc", SqlDbType.DateTime2, toUtc),
             Param("@StuckCutoff", SqlDbType.DateTime2, stuckCutoff),
diff --git a/src/ZB.MOM.WW.ScadaBridge.SiteCallAudit/SiteCallAuditActor.cs b/src/ZB.MOM.WW.ScadaBridge.SiteCallAudit/SiteCallAuditActor.cs
index a8970ebf..46d88b91 100644
--- a/src/ZB.MOM.WW.ScadaBridge.SiteCallAudit/SiteCallAuditActor.cs
+++ b/src/ZB.MOM.WW.ScadaBridge.SiteCallAudit/SiteCallAuditActor.cs
@@ -832,7 +832,8 @@ public class SiteCallAuditActor : ReceiveActor
             // keyset cursor, so the page is always honest (full pages, no empty
             // pages with a non-null next cursor).
             StuckCutoffUtc: request.StuckOnly ? stuckCutoff : null,
-            SourceNode: NullIfBlank(request.SourceNodeFilter));
+            SourceNode: NullIfBlank(request.SourceNodeFilter),
+            TrackedOperationId: request.TrackedOperationIdFilter);
 
         var pageSize = Math.Clamp(request.PageSize, 1, MaxPageSize);
         var paging = new SiteCallPaging(
diff --git a/tests/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests/Repositories/SiteCallAuditRepositoryTests.cs b/tests/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests/Repositories/SiteCallAuditRepositoryTests.cs
index f1353bb6..f389bbec 100644
--- a/tests/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests/Repositories/SiteCallAuditRepositoryTests.cs
+++ b/tests/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests/Repositories/SiteCallAuditRepositoryTests.cs
@@ -438,6 +438,40 @@ public class SiteCallAuditRepositoryTests : IClassFixture<MsSqlMigrationFixture>
         Assert.All(rows, r => Assert.Equal(siteA, r.SourceSite));
     }
 
+    [SkippableFact]
+    public async Task QueryAsync_FilterByTrackedOperationId_ReturnsExactlyThatRow()
+    {
+        // Flow Debugger follow-ups Task 2: SiteCallQueryFilter.TrackedOperationId is
+        // an exact PK match (the ?correlationId= deep link). The column is varchar(36)
+        // holding the "D"-format GUID string, so the predicate must compare as a
+        // string — a uniqueidentifier parameter would convert the column side and
+        // defeat the PK seek.
+        Skip.IfNot(_fixture.Available, _fixture.SkipReason);
+
+        var site = NewSiteId();
+        await using var context = CreateContext();
+        var repo = new SiteCallAuditRepository(context);
+
+        var idA = TrackedOperationId.New();
+        var idB = TrackedOperationId.New();
+        var t0 = new DateTime(2026, 9, 6, 10, 0, 0, DateTimeKind.Utc);
+        await repo.UpsertAsync(NewRow(idA, sourceSite: site, createdAtUtc: t0));
+        await repo.UpsertAsync(NewRow(idB, sourceSite: site, createdAtUtc: t0.AddMinutes(1)));
+
+        var rows = await repo.QueryAsync(
+            new SiteCallQueryFilter(TrackedOperationId: idA.Value),
+            new SiteCallPaging(PageSize: 10));
+
+        var row = Assert.Single(rows);
+        Assert.Equal(idA, row.TrackedOperationId);
+
+        // Composes with the other predicates: a mismatching site yields nothing.
+        var none = await repo.QueryAsync(
+            new SiteCallQueryFilter(SourceSite: NewSiteId(), TrackedOperationId: idA.Value),
+            new SiteCallPaging(PageSize: 10));
+        Assert.Empty(none);
+    }
+
     [SkippableFact]
     public async Task QueryAsync_KeysetPaging_NoOverlap()
     {
diff --git a/tests/ZB.MOM.WW.ScadaBridge.SiteCallAudit.Tests/SiteCallAuditActorTests.cs b/tests/ZB.MOM.WW.ScadaBridge.SiteCallAudit.Tests/SiteCallAuditActorTests.cs
index e08ef198..c001ebf9 100644
--- a/tests/ZB.MOM.WW.ScadaBridge.SiteCallAudit.Tests/SiteCallAuditActorTests.cs
+++ b/tests/ZB.MOM.WW.ScadaBridge.SiteCallAudit.Tests/SiteCallAuditActorTests.cs
@@ -268,6 +268,45 @@ public class SiteCallAuditActorTests : TestKit, IClassFixture<MsSqlMigrationFixt
         Assert.Equal("Attempted", response.SiteCalls[0].Status);
     }
 
+    [SkippableFact]
+    public async Task SiteCallQueryRequest_FilterByTrackedOperationId_ReturnsOnlyThatRow()
+    {
+        // Flow Debugger follow-ups Task 2: the ?correlationId= deep link pushes
+        // one operation id into SiteCallQueryRequest.TrackedOperationIdFilter —
+        // the actor must thread it onto SiteCallQueryFilter.TrackedOperationId
+        // so the page returns exactly that row and nothing else from the site.
+        Skip.IfNot(_fixture.Available, _fixture.SkipReason);
+
+        var siteId = NewSiteId();
+        await using var context = CreateContext();
+        var repo = new SiteCallAuditRepository(context);
+        var actor = CreateActor(repo);
+
+        var t0 = new DateTime(2026, 9, 6, 14, 0, 0, DateTimeKind.Utc);
+        var rowA = NewRow(TrackedOperationId.New(), siteId, status: "Attempted", createdAtUtc: t0);
+        var rowB = NewRow(
+            TrackedOperationId.New(), siteId, status: "Delivered",
+            createdAtUtc: t0.AddMinutes(1), terminal: true);
+        await repo.UpsertAsync(rowA);
+        await repo.UpsertAsync(rowB);
+
+        actor.Tell(
+            new SiteCallQueryRequest(
+                "corr-op", StatusFilter: null, SourceSiteFilter: siteId, ChannelFilter: null,
+                TargetKeyword: null, StuckOnly: false, FromUtc: null, ToUtc: null,
+                AfterCreatedAtUtc: null, AfterId: null, PageSize: 50,
+                TrackedOperationIdFilter: rowA.TrackedOperationId.Value),
+            TestActor);
+
+        var response = ExpectMsg<SiteCallQueryResponse>(TimeSpan.FromSeconds(10));
+        Assert.True(response.Success);
+        Assert.Single(response.SiteCalls);
+        Assert.Equal(rowA.TrackedOperationId.Value, response.SiteCalls[0].TrackedOperationId);
+        Assert.Equal("Attempted", response.SiteCalls[0].Status);
+        // No further page — the exact-match filter yields at most one row.
+        Assert.Equal(rowA.TrackedOperationId.Value, response.NextAfterId);
+    }
+
     [SkippableFact]
     public async Task SiteCallQueryRequest_KeysetPaging_AdvancesViaCursor()
     {