diff --git a/src/app/api/alerts/[id]/route.ts b/src/app/api/alerts/[id]/route.ts
new file mode 100644
index 0000000..018435b
--- /dev/null
+++ b/src/app/api/alerts/[id]/route.ts
@@ -0,0 +1,9 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { eq } from 'drizzle-orm'
+import { db, alerts } from '@/lib/db'
+
+export async function DELETE(_req: NextRequest, { params }: { params: Promise<{ id: string }> }) {
+  const { id } = await params
+  await db.delete(alerts).where(eq(alerts.id, id))
+  return NextResponse.json({ ok: true })
+}
diff --git a/src/app/api/alerts/route.ts b/src/app/api/alerts/route.ts
new file mode 100644
index 0000000..ac4acde
--- /dev/null
+++ b/src/app/api/alerts/route.ts
@@ -0,0 +1,39 @@
+import { NextRequest, NextResponse } from 'next/server'
+import { z } from 'zod'
+import { db, alerts } from '@/lib/db'
+
+const CreateSchema = z.object({
+  productId: z.string().uuid(),
+  type: z.enum(['target_price', 'all_time_low', 'percent_drop']),
+  config: z.record(z.string(), z.unknown()),
+})
+
+export async function POST(req: NextRequest) {
+  const body = await req.json()
+  const parsed = CreateSchema.safeParse(body)
+  if (!parsed.success) return NextResponse.json({ error: parsed.error.message }, { status: 400 })
+
+  const cfg = parsed.data.config
+  switch (parsed.data.type) {
+    case 'target_price':
+      if (typeof cfg.threshold !== 'number' || cfg.threshold <= 0) {
+        return NextResponse.json({ error: 'threshold (number > 0) required' }, { status: 400 })
+      }
+      break
+    case 'percent_drop':
+      if (typeof cfg.lookback_days !== 'number' || typeof cfg.percent !== 'number') {
+        return NextResponse.json({ error: 'lookback_days + percent required' }, { status: 400 })
+      }
+      break
+    case 'all_time_low':
+      break
+  }
+
+  const [inserted] = await db.insert(alerts).values({
+    productId: parsed.data.productId,
+    type: parsed.data.type,
+    config: parsed.data.config,
+  }).returning()
+
+  return NextResponse.json(inserted, { status: 201 })
+}