diff --git a/app/api/inbox/batch/route.ts b/app/api/inbox/batch/route.ts
new file mode 100644
index 0000000..f84c0f3
--- /dev/null
+++ b/app/api/inbox/batch/route.ts
@@ -0,0 +1,170 @@
+/**
+ * POST /api/inbox/batch
+ *
+ * Recebe múltiplas notificações do app Android (sync offline).
+ * Requer autenticação via API token.
+ */
+
+import { validateApiToken, extractBearerToken } from "@/lib/auth/api-token";
+import { db } from "@/lib/db";
+import { apiTokens, inboxItems } from "@/db/schema";
+import { eq, and, isNull } from "drizzle-orm";
+import { NextResponse } from "next/server";
+import { inboxBatchSchema } from "@/lib/schemas/inbox";
+import { z } from "zod";
+
+// Rate limiting simples em memória
+const rateLimitMap = new Map<string, { count: number; resetAt: number }>();
+const RATE_LIMIT = 20; // 20 batch requests
+const RATE_WINDOW = 60 * 1000; // por minuto
+
+function checkRateLimit(userId: string): boolean {
+  const now = Date.now();
+  const userLimit = rateLimitMap.get(userId);
+
+  if (!userLimit || userLimit.resetAt < now) {
+    rateLimitMap.set(userId, { count: 1, resetAt: now + RATE_WINDOW });
+    return true;
+  }
+
+  if (userLimit.count >= RATE_LIMIT) {
+    return false;
+  }
+
+  userLimit.count++;
+  return true;
+}
+
+interface BatchResult {
+  clientId?: string;
+  serverId?: string;
+  success: boolean;
+  error?: string;
+}
+
+export async function POST(request: Request) {
+  try {
+    // Extrair token do header
+    const authHeader = request.headers.get("Authorization");
+    const token = extractBearerToken(authHeader);
+
+    if (!token) {
+      return NextResponse.json(
+        { error: "Token não fornecido" },
+        { status: 401 }
+      );
+    }
+
+    // Validar JWT
+    const payload = validateApiToken(token);
+
+    if (!payload) {
+      return NextResponse.json(
+        { error: "Token inválido ou expirado" },
+        { status: 401 }
+      );
+    }
+
+    // Verificar se token não foi revogado
+    const tokenRecord = await db.query.apiTokens.findFirst({
+      where: and(
+        eq(apiTokens.id, payload.tokenId),
+        eq(apiTokens.userId, payload.sub),
+        isNull(apiTokens.revokedAt)
+      ),
+    });
+
+    if (!tokenRecord) {
+      return NextResponse.json(
+        { error: "Token revogado ou não encontrado" },
+        { status: 401 }
+      );
+    }
+
+    // Rate limiting
+    if (!checkRateLimit(payload.sub)) {
+      return NextResponse.json(
+        { error: "Limite de requisições excedido", retryAfter: 60 },
+        { status: 429 }
+      );
+    }
+
+    // Validar body
+    const body = await request.json();
+    const { items } = inboxBatchSchema.parse(body);
+
+    // Processar cada item
+    const results: BatchResult[] = [];
+
+    for (const item of items) {
+      try {
+        const [inserted] = await db
+          .insert(inboxItems)
+          .values({
+            userId: payload.sub,
+            sourceApp: item.sourceApp,
+            sourceAppName: item.sourceAppName,
+            deviceId: item.deviceId || payload.deviceId,
+            originalTitle: item.originalTitle,
+            originalText: item.originalText,
+            notificationTimestamp: item.notificationTimestamp,
+            parsedName: item.parsedName,
+            parsedAmount: item.parsedAmount?.toString(),
+            parsedDate: item.parsedDate,
+            parsedCardLastDigits: item.parsedCardLastDigits,
+            parsedTransactionType: item.parsedTransactionType,
+            status: "pending",
+          })
+          .returning({ id: inboxItems.id });
+
+        results.push({
+          clientId: item.clientId,
+          serverId: inserted.id,
+          success: true,
+        });
+      } catch (error) {
+        results.push({
+          clientId: item.clientId,
+          success: false,
+          error: error instanceof Error ? error.message : "Erro desconhecido",
+        });
+      }
+    }
+
+    // Atualizar último uso do token
+    await db
+      .update(apiTokens)
+      .set({
+        lastUsedAt: new Date(),
+        lastUsedIp: request.headers.get("x-forwarded-for") || request.headers.get("x-real-ip"),
+      })
+      .where(eq(apiTokens.id, payload.tokenId));
+
+    const successCount = results.filter((r) => r.success).length;
+    const failCount = results.filter((r) => !r.success).length;
+
+    return NextResponse.json(
+      {
+        message: `${successCount} notificações processadas${failCount > 0 ? `, ${failCount} falharam` : ""}`,
+        total: items.length,
+        success: successCount,
+        failed: failCount,
+        results,
+      },
+      { status: 201 }
+    );
+  } catch (error) {
+    if (error instanceof z.ZodError) {
+      return NextResponse.json(
+        { error: error.issues[0]?.message ?? "Dados inválidos" },
+        { status: 400 }
+      );
+    }
+
+    console.error("[API] Error creating batch inbox items:", error);
+    return NextResponse.json(
+      { error: "Erro ao processar notificações" },
+      { status: 500 }
+    );
+  }
+}
diff --git a/app/api/inbox/route.ts b/app/api/inbox/route.ts
new file mode 100644
index 0000000..3b11afa
--- /dev/null
+++ b/app/api/inbox/route.ts
@@ -0,0 +1,140 @@
+/**
+ * POST /api/inbox
+ *
+ * Recebe uma notificação do app Android.
+ * Requer autenticação via API token.
+ */
+
+import { validateApiToken, extractBearerToken } from "@/lib/auth/api-token";
+import { db } from "@/lib/db";
+import { apiTokens, inboxItems } from "@/db/schema";
+import { eq, and, isNull } from "drizzle-orm";
+import { NextResponse } from "next/server";
+import { inboxItemSchema } from "@/lib/schemas/inbox";
+import { z } from "zod";
+
+// Rate limiting simples em memória (em produção, use Redis)
+const rateLimitMap = new Map<string, { count: number; resetAt: number }>();
+const RATE_LIMIT = 100; // 100 requests
+const RATE_WINDOW = 60 * 1000; // por minuto
+
+function checkRateLimit(userId: string): boolean {
+  const now = Date.now();
+  const userLimit = rateLimitMap.get(userId);
+
+  if (!userLimit || userLimit.resetAt < now) {
+    rateLimitMap.set(userId, { count: 1, resetAt: now + RATE_WINDOW });
+    return true;
+  }
+
+  if (userLimit.count >= RATE_LIMIT) {
+    return false;
+  }
+
+  userLimit.count++;
+  return true;
+}
+
+export async function POST(request: Request) {
+  try {
+    // Extrair token do header
+    const authHeader = request.headers.get("Authorization");
+    const token = extractBearerToken(authHeader);
+
+    if (!token) {
+      return NextResponse.json(
+        { error: "Token não fornecido" },
+        { status: 401 }
+      );
+    }
+
+    // Validar JWT
+    const payload = validateApiToken(token);
+
+    if (!payload) {
+      return NextResponse.json(
+        { error: "Token inválido ou expirado" },
+        { status: 401 }
+      );
+    }
+
+    // Verificar se token não foi revogado
+    const tokenRecord = await db.query.apiTokens.findFirst({
+      where: and(
+        eq(apiTokens.id, payload.tokenId),
+        eq(apiTokens.userId, payload.sub),
+        isNull(apiTokens.revokedAt)
+      ),
+    });
+
+    if (!tokenRecord) {
+      return NextResponse.json(
+        { error: "Token revogado ou não encontrado" },
+        { status: 401 }
+      );
+    }
+
+    // Rate limiting
+    if (!checkRateLimit(payload.sub)) {
+      return NextResponse.json(
+        { error: "Limite de requisições excedido", retryAfter: 60 },
+        { status: 429 }
+      );
+    }
+
+    // Validar body
+    const body = await request.json();
+    const data = inboxItemSchema.parse(body);
+
+    // Inserir item na inbox
+    const [inserted] = await db
+      .insert(inboxItems)
+      .values({
+        userId: payload.sub,
+        sourceApp: data.sourceApp,
+        sourceAppName: data.sourceAppName,
+        deviceId: data.deviceId || payload.deviceId,
+        originalTitle: data.originalTitle,
+        originalText: data.originalText,
+        notificationTimestamp: data.notificationTimestamp,
+        parsedName: data.parsedName,
+        parsedAmount: data.parsedAmount?.toString(),
+        parsedDate: data.parsedDate,
+        parsedCardLastDigits: data.parsedCardLastDigits,
+        parsedTransactionType: data.parsedTransactionType,
+        status: "pending",
+      })
+      .returning({ id: inboxItems.id });
+
+    // Atualizar último uso do token
+    await db
+      .update(apiTokens)
+      .set({
+        lastUsedAt: new Date(),
+        lastUsedIp: request.headers.get("x-forwarded-for") || request.headers.get("x-real-ip"),
+      })
+      .where(eq(apiTokens.id, payload.tokenId));
+
+    return NextResponse.json(
+      {
+        id: inserted.id,
+        clientId: data.clientId,
+        message: "Notificação recebida",
+      },
+      { status: 201 }
+    );
+  } catch (error) {
+    if (error instanceof z.ZodError) {
+      return NextResponse.json(
+        { error: error.issues[0]?.message ?? "Dados inválidos" },
+        { status: 400 }
+      );
+    }
+
+    console.error("[API] Error creating inbox item:", error);
+    return NextResponse.json(
+      { error: "Erro ao processar notificação" },
+      { status: 500 }
+    );
+  }
+}