diff --git a/package.json b/package.json
index 98d0fbf..3775949 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,8 @@
   "scripts": {
     "build": "tsc",
     "start": "node dist/index.js",
-    "dev": "tsx --watch src/index.ts"
+    "dev": "tsx --watch src/index.ts",
+    "seed:demo": "tsx scripts/seed-demo.ts"
   },
   "dependencies": {
     "@fastify/cors": "^11.2.0",
diff --git a/scripts/seed-demo.ts b/scripts/seed-demo.ts
new file mode 100644
index 0000000..e94fb0b
--- /dev/null
+++ b/scripts/seed-demo.ts
@@ -0,0 +1,167 @@
+import { aql } from 'arangojs'
+import { ensureGraph, getDb } from '../src/db.js'
+
+type GeoNode = {
+  _key: string
+  node_type: string
+  name: string
+  latitude: number
+  longitude: number
+  country: string
+  country_code: string
+  transport_types?: string[]
+  product_uuid?: string
+  product_name?: string
+  supplier_uuid?: string
+  supplier_name?: string
+  price_per_unit?: string
+  currency?: string
+  quantity?: string
+  unit?: string
+  synced_at: string
+}
+
+async function upsertNode(doc: GeoNode) {
+  const { _key, ...patch } = doc
+  await getDb().query(aql`
+    UPSERT { _key: ${_key} }
+    INSERT ${doc}
+    UPDATE ${patch}
+    IN ${getDb().collection('nodes')}
+  `)
+}
+
+async function upsertEdge(doc: Record<string, unknown>) {
+  const key = String(doc._key)
+  const { _key, ...patch } = doc
+  await getDb().query(aql`
+    UPSERT { _key: ${key} }
+    INSERT ${doc}
+    UPDATE ${patch}
+    IN ${getDb().collection('edges')}
+  `)
+}
+
+await ensureGraph()
+
+const now = new Date().toISOString()
+
+const hubs: GeoNode[] = [
+  {
+    _key: 'logistics-demo-hub-1',
+    node_type: 'logistics',
+    name: 'Demo Almaty Hub',
+    latitude: 43.238949,
+    longitude: 76.889709,
+    country: 'Kazakhstan',
+    country_code: 'KZ',
+    transport_types: ['AUTO', 'RAIL'],
+    synced_at: now,
+  },
+  {
+    _key: 'logistics-demo-hub-2',
+    node_type: 'logistics',
+    name: 'Demo Moscow Hub',
+    latitude: 55.755826,
+    longitude: 37.6173,
+    country: 'Russia',
+    country_code: 'RU',
+    transport_types: ['AUTO', 'RAIL'],
+    synced_at: now,
+  },
+  {
+    _key: 'logistics-demo-hub-3',
+    node_type: 'logistics',
+    name: 'Demo Urumqi Hub',
+    latitude: 43.825592,
+    longitude: 87.616848,
+    country: 'China',
+    country_code: 'CN',
+    transport_types: ['AUTO', 'RAIL'],
+    synced_at: now,
+  },
+]
+
+const offers: GeoNode[] = Array.from({ length: 24 }, (_, index) => ({
+  _key: `geo-demo-offer-${index + 1}`,
+  node_type: 'offer',
+  name: `Demo offer ${index + 1}`,
+  latitude: 43.238949 + (index % 6) * 0.12,
+  longitude: 76.889709 + Math.floor(index / 6) * 0.18,
+  country: index % 3 === 0 ? 'Kazakhstan' : index % 3 === 1 ? 'China' : 'Russia',
+  country_code: index % 3 === 0 ? 'KZ' : index % 3 === 1 ? 'CN' : 'RU',
+  product_uuid: ['55555555-1111-4111-8111-111111111111', '55555555-1111-4111-8111-222222222222', '55555555-1111-4111-8111-333333333333'][index % 3],
+  product_name: ['Copper cathode', 'Aluminum ingot', 'Wheat'][index % 3],
+  supplier_uuid: ['66666666-2222-4111-8111-111111111111', '66666666-2222-4111-8111-222222222222', '66666666-2222-4111-8111-333333333333'][index % 3],
+  supplier_name: ['Demo Supplier Almaty', 'Demo Supplier Urumqi', 'Demo Supplier Moscow'][index % 3],
+  price_per_unit: String(900 + (index % 8) * 55),
+  currency: 'USD',
+  quantity: String(500 + index * 25),
+  unit: 'ton',
+  synced_at: now,
+}))
+
+const suppliers: GeoNode[] = [
+  {
+    _key: 'geo-demo-supplier-1',
+    node_type: 'supplier',
+    name: 'Demo Supplier Almaty',
+    latitude: 43.25667,
+    longitude: 76.92861,
+    country: 'Kazakhstan',
+    country_code: 'KZ',
+    synced_at: now,
+  },
+  {
+    _key: 'geo-demo-supplier-2',
+    node_type: 'supplier',
+    name: 'Demo Supplier Urumqi',
+    latitude: 43.825592,
+    longitude: 87.616848,
+    country: 'China',
+    country_code: 'CN',
+    synced_at: now,
+  },
+  {
+    _key: 'geo-demo-supplier-3',
+    node_type: 'supplier',
+    name: 'Demo Supplier Moscow',
+    latitude: 55.755826,
+    longitude: 37.6173,
+    country: 'Russia',
+    country_code: 'RU',
+    synced_at: now,
+  },
+]
+
+for (const node of [...hubs, ...offers, ...suppliers]) {
+  await upsertNode(node)
+}
+
+await upsertEdge({
+  _key: 'geo-demo-edge-1',
+  _from: 'nodes/logistics-demo-hub-1',
+  _to: 'nodes/logistics-demo-hub-2',
+  to_uuid: 'logistics-demo-hub-2',
+  to_name: 'Demo Moscow Hub',
+  to_latitude: 55.755826,
+  to_longitude: 37.6173,
+  distance_km: 3950,
+  travel_time_seconds: 864000,
+  transport_type: 'rail',
+})
+
+await upsertEdge({
+  _key: 'geo-demo-edge-2',
+  _from: 'nodes/logistics-demo-hub-1',
+  _to: 'nodes/logistics-demo-hub-3',
+  to_uuid: 'logistics-demo-hub-3',
+  to_name: 'Demo Urumqi Hub',
+  to_latitude: 43.825592,
+  to_longitude: 87.616848,
+  distance_km: 1050,
+  travel_time_seconds: 172800,
+  transport_type: 'auto',
+})
+
+console.log(`Seeded geo demo data: hubs ${hubs.length}, offers ${offers.length}, suppliers ${suppliers.length}`)