diff --git a/web-v2/src/lib/findingCatalogMerge.ts b/web-v2/src/lib/findingCatalogMerge.ts
new file mode 100644
index 0000000..28997b1
--- /dev/null
+++ b/web-v2/src/lib/findingCatalogMerge.ts
@@ -0,0 +1,62 @@
+import { apiRequest } from './api';
+
+export interface FindingCatalogMergeItem {
+  id: string;
+  categoryId: string;
+  categoryCode: string;
+  categoryName: string;
+  code: string;
+  sourceNumber: number;
+  title: string;
+  legalBasis: string | null;
+  glossary: string | null;
+  importNote: string | null;
+  suggestedSeverity: number | null;
+  revision: number;
+  isActive: boolean;
+}
+
+export interface FindingCatalogMergeAlias {
+  id: string;
+  code: string;
+  title: string;
+  reason: string;
+  mergedAt: string;
+  depth: number;
+}
+
+export interface FindingCatalogMergeStatus {
+  requested: FindingCatalogMergeItem;
+  isMerged: boolean;
+  canonical: FindingCatalogMergeItem;
+  aliases: FindingCatalogMergeAlias[];
+}
+
+export interface FindingCatalogMergeResult {
+  merge: {
+    id: string;
+    sourceItemId: string;
+    canonicalItemId: string;
+    reason: string;
+    mergedAt: string;
+    mergedBy: string;
+    requestId: string;
+  };
+  source: FindingCatalogMergeItem;
+  canonical: FindingCatalogMergeItem;
+  historyPolicy: 'EMITTED_FINDINGS_PRESERVED';
+}
+
+export function getFindingCatalogMergeStatus(itemId: string) {
+  return apiRequest<FindingCatalogMergeStatus>(`/finding-catalog/items/${itemId}/merge-status`);
+}
+
+export function mergeFindingCatalogItem(
+  sourceItemId: string,
+  input: { canonicalItemId: string; reason: string },
+) {
+  return apiRequest<FindingCatalogMergeResult>(`/finding-catalog/items/${sourceItemId}/merge`, {
+    method: 'POST',
+    body: JSON.stringify(input),
+  });
+}