diff --git a/server/routes/pedigree.js b/server/routes/pedigree.js
index bf68b9a..3cb3861 100644
--- a/server/routes/pedigree.js
+++ b/server/routes/pedigree.js
@@ -124,8 +124,7 @@ function calculateCOI(db, sireId, damId) {
 // 'trial-pairing' as dog IDs and return 404/wrong data.
 // =====================================================================
 
-// POST /api/pedigree/trial-pairing (alias for /coi)
-router.post(['/trial-pairing', '/coi'], (req, res) => {
+const handleTrialPairing = (req, res) => {
   try {
     const { sire_id, dam_id } = req.body;
     if (!sire_id || !dam_id) {
@@ -156,7 +155,13 @@ router.post(['/trial-pairing', '/coi'], (req, res) => {
   } catch (error) {
     res.status(500).json({ error: error.message });
   }
-});
+};
+
+// POST /api/pedigree/trial-pairing
+router.post('/trial-pairing', handleTrialPairing);
+
+// POST /api/pedigree/coi
+router.post('/coi', handleTrialPairing);
 
 // GET /api/pedigree/:id/coi
 router.get('/:id/coi', (req, res) => {
diff --git a/server/test_app.js b/server/test_app.js
new file mode 100644
index 0000000..9c92902
--- /dev/null
+++ b/server/test_app.js
@@ -0,0 +1,26 @@
+const app = require('./index');
+const http = require('http');
+
+// Start temporary server
+const server = http.createServer(app);
+server.listen(3030, async () => {
+  console.log('Server started on 3030');
+  try {
+    const res = await fetch('http://localhost:3030/api/pedigree/relations/1/2');
+    const text = await res.text();
+    console.log('GET /api/pedigree/relations/1/2 RESPONSE:', res.status, text.substring(0, 150));
+
+    const postRes = await fetch('http://localhost:3030/api/pedigree/trial-pairing', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ sire_id: 1, dam_id: 2 })
+    });
+    const postText = await postRes.text();
+    console.log('POST /api/pedigree/trial-pairing RESPONSE:', postRes.status, postText.substring(0, 150));
+  } catch (err) {
+    console.error('Fetch error:', err);
+  } finally {
+    server.close();
+    process.exit(0);
+  }
+});
diff --git a/server/test_express.js b/server/test_express.js
new file mode 100644
index 0000000..7223b49
--- /dev/null
+++ b/server/test_express.js
@@ -0,0 +1,8 @@
+const express = require('express');
+const router = express.Router();
+
+router.post(['/a', '/b'], (req, res) => {
+  res.send('ok');
+});
+
+console.log('Started successfully');