diff --git a/scripts/daily-cost-snapshot.sh b/scripts/daily-cost-snapshot.sh
new file mode 100755
index 0000000..509c0f5
--- /dev/null
+++ b/scripts/daily-cost-snapshot.sh
@@ -0,0 +1,56 @@
+#!/bin/bash
+# Daily LiteLLM cost snapshot — cron at midnight
+# Writes to /var/log/litellm/costs.csv on CT 116
+
+MASTER="sk-litellm-7f96080dd99b15c36bd4b333b58a6796"
+BASE="http://127.0.0.1:4001"
+CSV="/var/log/litellm/costs.csv"
+DATE=$(date -I)
+YESTERDAY=$(date -I -d yesterday)
+
+# Fetch yesterday's spend by key
+RESP=$(curl -s "${BASE}/global/spend/logs?start_date=${YESTERDAY}T00:00:00&end_date=${YESTERDAY}T23:59:59&page_size=1000" \
+  -H "Authorization: Bearer $MASTER" 2>/dev/null)
+
+# Parse total spend
+TOTAL=$(echo "$RESP" | python3 -c "
+import sys, json
+data = json.load(sys.stdin)
+total = sum(r.get('spend', 0) or 0 for r in data.get('data', []))
+print(f'{total:.6f}')
+" 2>/dev/null)
+
+# Parse per-model spend
+PER_MODEL=$(echo "$RESP" | python3 -c "
+import sys, json
+from collections import defaultdict
+data = json.load(sys.stdin)
+spend = defaultdict(float)
+for r in data.get('data', []):
+    model = r.get('model', 'unknown')
+    spend[model] += r.get('spend', 0) or 0
+for model, cost in sorted(spend.items()):
+    print(f'{model}:{cost:.6f}')
+" 2>/dev/null)
+
+# Per-key spend
+PER_KEY=$(echo "$RESP" | python3 -c "
+import sys, json
+from collections import defaultdict
+data = json.load(sys.stdin)
+spend = defaultdict(float)
+for r in data.get('data', []):
+    key = r.get('api_key', 'unknown')[:20]
+    spend[key] += r.get('spend', 0) or 0
+for key, cost in sorted(spend.items()):
+    print(f'{key}:{cost:.6f}')
+" 2>/dev/null)
+
+# Write CSV
+mkdir -p $(dirname "$CSV")
+if [ ! -f "$CSV" ]; then
+  echo "date,total_cost,per_model,per_key" > "$CSV"
+fi
+echo "${DATE},${TOTAL},\"${PER_MODEL}\",\"${PER_KEY}\"" >> "$CSV"
+
+echo "Snapshot: ${DATE} | Total: \$${TOTAL}"