diff --git a/backend/crates/integration-tests/Cargo.toml b/backend/crates/integration-tests/Cargo.toml
index 943f7e8..802d5ca 100644
--- a/backend/crates/integration-tests/Cargo.toml
+++ b/backend/crates/integration-tests/Cargo.toml
@@ -21,12 +21,15 @@ serial_test = "2.0"
 # Local crates
 api = { path = "../api" }
 application = { path = "../application" }
+cli = { path = "../cli" }
 domain = { path = "../domain" }
+memory = { path = "../memory" }
 postgres = { path = "../postgres" }
 
 # Additional test dependencies
 hyper = { version = "1.0", features = ["full"] }
 tower-http = { version = "0.5", features = ["cors", "trace"] }
+clap = { version = "4.0", features = ["derive"] }
 
 [dev-dependencies]
 serial_test = "2.0" 
\ No newline at end of file
diff --git a/backend/crates/integration-tests/src/cli_tests.rs b/backend/crates/integration-tests/src/cli_tests.rs
new file mode 100644
index 0000000..2da37b6
--- /dev/null
+++ b/backend/crates/integration-tests/src/cli_tests.rs
@@ -0,0 +1,406 @@
+/*
+ * This file is part of Sharenet.
+ * 
+ * Sharenet is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
+ * 
+ * You may obtain a copy of the license at:
+ * https://creativecommons.org/licenses/by-nc-sa/4.0/
+ * 
+ * Copyright (c) 2024 Continuist <continuist02@gmail.com>
+ */
+
+use anyhow::Result;
+use clap::Parser;
+use cli::{Cli, Commands, UserCommands, ProductCommands};
+use domain::{User, Product, CreateUser, UpdateUser, CreateProduct, UpdateProduct};
+use application::Service;
+use memory::{InMemoryUserRepository, InMemoryProductRepository};
+use postgres::{PostgresUserRepository, PostgresProductRepository};
+use sqlx::PgPool;
+use sqlx::postgres::PgPoolOptions;
+use std::env;
+use uuid::Uuid;
+use serial_test::serial;
+use application::UseCase;
+
+// Helper functions for test setup
+async fn setup_test_db() -> PgPool {
+    let database_url = env::var("DATABASE_URL")
+        .unwrap_or_else(|_| "postgres://postgres:password@localhost:5432/sharenet_test".to_string());
+    let pool = PgPoolOptions::new()
+        .max_connections(5)
+        .connect(&database_url)
+        .await
+        .expect("Failed to connect to test database");
+    sqlx::migrate!("../../migrations")
+        .run(&pool)
+        .await
+        .expect("Failed to run migrations");
+    cleanup_test_data(&pool).await;
+    pool
+}
+
+async fn cleanup_test_data(pool: &PgPool) {
+    let mut tx = pool.begin().await.expect("Failed to begin transaction");
+    sqlx::query("DELETE FROM products").execute(&mut *tx).await.expect("Failed to delete products");
+    sqlx::query("DELETE FROM users").execute(&mut *tx).await.expect("Failed to delete users");
+    tx.commit().await.expect("Failed to commit cleanup transaction");
+}
+
+fn unique_test_data(prefix: &str) -> (String, String) {
+    let id = Uuid::new_v4().to_string()[..8].to_string();
+    (format!("{}_{}", prefix, id), format!("{}_test@example.com", prefix))
+}
+
+// Test CLI with memory repository
+#[tokio::test]
+#[serial]
+async fn test_cli_with_memory_user_lifecycle() -> Result<()> {
+    let user_repo = InMemoryUserRepository::new();
+    let product_repo = InMemoryProductRepository::new();
+    let user_service = Service::new(user_repo);
+    let product_service = Service::new(product_repo);
+
+    // Test user create
+    let (username, email) = unique_test_data("test_user");
+    let cli = Cli::parse_from(&[
+        "cli", "user", "create", "--username", &username, "--email", &email
+    ]);
+    
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test user list
+    let cli = Cli::parse_from(&["cli", "user", "list"]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test user get (we need to get the ID from the list first)
+    let users = user_service.list().await?;
+    assert!(!users.is_empty());
+    let user_id = users[0].id;
+
+    let cli = Cli::parse_from(&["cli", "user", "get", "--id", &user_id.to_string()]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test user update
+    let new_username = format!("{}_updated", username);
+    let cli = Cli::parse_from(&[
+        "cli", "user", "update", "--id", &user_id.to_string(), "--username", &new_username
+    ]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test user delete
+    let cli = Cli::parse_from(&["cli", "user", "delete", "--id", &user_id.to_string()]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    Ok(())
+}
+
+#[tokio::test]
+#[serial]
+async fn test_cli_with_memory_product_lifecycle() -> Result<()> {
+    let user_repo = InMemoryUserRepository::new();
+    let product_repo = InMemoryProductRepository::new();
+    let user_service = Service::new(user_repo);
+    let product_service = Service::new(product_repo);
+
+    // Test product create
+    let (name, description) = unique_test_data("test_product");
+    let cli = Cli::parse_from(&[
+        "cli", "product", "create", "--name", &name, "--description", &description
+    ]);
+    
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test product list
+    let cli = Cli::parse_from(&["cli", "product", "list"]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test product get (we need to get the ID from the list first)
+    let products = product_service.list().await?;
+    assert!(!products.is_empty());
+    let product_id = products[0].id;
+
+    let cli = Cli::parse_from(&["cli", "product", "get", "--id", &product_id.to_string()]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test product update
+    let new_name = format!("{}_updated", name);
+    let cli = Cli::parse_from(&[
+        "cli", "product", "update", "--id", &product_id.to_string(), "--name", &new_name
+    ]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test product delete
+    let cli = Cli::parse_from(&["cli", "product", "delete", "--id", &product_id.to_string()]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    Ok(())
+}
+
+#[tokio::test]
+#[serial]
+async fn test_cli_with_memory_mixed_operations() -> Result<()> {
+    let user_repo = InMemoryUserRepository::new();
+    let product_repo = InMemoryProductRepository::new();
+    let user_service = Service::new(user_repo);
+    let product_service = Service::new(product_repo);
+
+    // Create multiple users and products
+    for i in 1..=3 {
+        let (username, email) = unique_test_data(&format!("user_{}", i));
+        let cli = Cli::parse_from(&[
+            "cli", "user", "create", "--username", &username, "--email", &email
+        ]);
+        cli.run(user_service.clone(), product_service.clone()).await?;
+
+        let (name, description) = unique_test_data(&format!("product_{}", i));
+        let cli = Cli::parse_from(&[
+            "cli", "product", "create", "--name", &name, "--description", &description
+        ]);
+        cli.run(user_service.clone(), product_service.clone()).await?;
+    }
+
+    // List all users and products
+    let cli = Cli::parse_from(&["cli", "user", "list"]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    let cli = Cli::parse_from(&["cli", "product", "list"]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Verify counts
+    let users = user_service.list().await?;
+    let products = product_service.list().await?;
+    assert_eq!(users.len(), 3);
+    assert_eq!(products.len(), 3);
+
+    Ok(())
+}
+
+// Test CLI with PostgreSQL repository
+#[tokio::test]
+#[serial]
+async fn test_cli_with_postgres_user_lifecycle() -> Result<()> {
+    let pool = setup_test_db().await;
+    let user_repo = PostgresUserRepository::new(pool.clone());
+    let product_repo = PostgresProductRepository::new(pool.clone());
+    let user_service = Service::new(user_repo);
+    let product_service = Service::new(product_repo);
+
+    // Test user create
+    let (username, email) = unique_test_data("test_user");
+    let cli = Cli::parse_from(&[
+        "cli", "user", "create", "--username", &username, "--email", &email
+    ]);
+    
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test user list
+    let cli = Cli::parse_from(&["cli", "user", "list"]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test user get (we need to get the ID from the list first)
+    let users = user_service.list().await?;
+    assert!(!users.is_empty());
+    let user_id = users[0].id;
+
+    let cli = Cli::parse_from(&["cli", "user", "get", "--id", &user_id.to_string()]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test user update
+    let new_username = format!("{}_updated", username);
+    let cli = Cli::parse_from(&[
+        "cli", "user", "update", "--id", &user_id.to_string(), "--username", &new_username
+    ]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test user delete
+    let cli = Cli::parse_from(&["cli", "user", "delete", "--id", &user_id.to_string()]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    Ok(())
+}
+
+#[tokio::test]
+#[serial]
+async fn test_cli_with_postgres_product_lifecycle() -> Result<()> {
+    let pool = setup_test_db().await;
+    let user_repo = PostgresUserRepository::new(pool.clone());
+    let product_repo = PostgresProductRepository::new(pool.clone());
+    let user_service = Service::new(user_repo);
+    let product_service = Service::new(product_repo);
+
+    // Test product create
+    let (name, description) = unique_test_data("test_product");
+    let cli = Cli::parse_from(&[
+        "cli", "product", "create", "--name", &name, "--description", &description
+    ]);
+    
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test product list
+    let cli = Cli::parse_from(&["cli", "product", "list"]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test product get (we need to get the ID from the list first)
+    let products = product_service.list().await?;
+    assert!(!products.is_empty());
+    let product_id = products[0].id;
+
+    let cli = Cli::parse_from(&["cli", "product", "get", "--id", &product_id.to_string()]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test product update
+    let new_name = format!("{}_updated", name);
+    let cli = Cli::parse_from(&[
+        "cli", "product", "update", "--id", &product_id.to_string(), "--name", &new_name
+    ]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Test product delete
+    let cli = Cli::parse_from(&["cli", "product", "delete", "--id", &product_id.to_string()]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    Ok(())
+}
+
+#[tokio::test]
+#[serial]
+async fn test_cli_with_postgres_mixed_operations() -> Result<()> {
+    let pool = setup_test_db().await;
+    let user_repo = PostgresUserRepository::new(pool.clone());
+    let product_repo = PostgresProductRepository::new(pool.clone());
+    let user_service = Service::new(user_repo);
+    let product_service = Service::new(product_repo);
+
+    // Create multiple users and products
+    for i in 1..=3 {
+        let (username, email) = unique_test_data(&format!("user_{}", i));
+        let cli = Cli::parse_from(&[
+            "cli", "user", "create", "--username", &username, "--email", &email
+        ]);
+        cli.run(user_service.clone(), product_service.clone()).await?;
+
+        let (name, description) = unique_test_data(&format!("product_{}", i));
+        let cli = Cli::parse_from(&[
+            "cli", "product", "create", "--name", &name, "--description", &description
+        ]);
+        cli.run(user_service.clone(), product_service.clone()).await?;
+    }
+
+    // List all users and products
+    let cli = Cli::parse_from(&["cli", "user", "list"]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    let cli = Cli::parse_from(&["cli", "product", "list"]);
+    cli.run(user_service.clone(), product_service.clone()).await?;
+
+    // Verify counts
+    let users = user_service.list().await?;
+    let products = product_service.list().await?;
+    assert_eq!(users.len(), 3);
+    assert_eq!(products.len(), 3);
+
+    Ok(())
+}
+
+// Test error handling
+#[tokio::test]
+#[serial]
+async fn test_cli_error_handling() -> Result<()> {
+    let user_repo = InMemoryUserRepository::new();
+    let product_repo = InMemoryProductRepository::new();
+    let user_service = Service::new(user_repo);
+    let product_service = Service::new(product_repo);
+
+    // Test getting non-existent user
+    let non_existent_id = Uuid::new_v4();
+    let cli = Cli::parse_from(&["cli", "user", "get", "--id", &non_existent_id.to_string()]);
+    let result = cli.run(user_service.clone(), product_service.clone()).await;
+    assert!(result.is_err());
+
+    // Test getting non-existent product
+    let cli = Cli::parse_from(&["cli", "product", "get", "--id", &non_existent_id.to_string()]);
+    let result = cli.run(user_service.clone(), product_service.clone()).await;
+    assert!(result.is_err());
+
+    // Test updating non-existent user
+    let cli = Cli::parse_from(&[
+        "cli", "user", "update", "--id", &non_existent_id.to_string(), "--username", "new_name"
+    ]);
+    let result = cli.run(user_service.clone(), product_service.clone()).await;
+    assert!(result.is_err());
+
+    // Test deleting non-existent user
+    let cli = Cli::parse_from(&["cli", "user", "delete", "--id", &non_existent_id.to_string()]);
+    let result = cli.run(user_service.clone(), product_service.clone()).await;
+    assert!(result.is_err());
+
+    Ok(())
+}
+
+// Test edge cases
+#[tokio::test]
+#[serial]
+async fn test_cli_edge_cases() -> Result<()> {
+    let user_repo = InMemoryUserRepository::new();
+    let product_repo = InMemoryProductRepository::new();
+    let user_service = Service::new(user_repo);
+    let product_service = Service::new(product_repo);
+
+    // Test empty strings (currently allowed by domain layer)
+    let cli = Cli::parse_from(&[
+        "cli", "user", "create", "--username", "", "--email", ""
+    ]);
+    let result = cli.run(user_service.clone(), product_service.clone()).await;
+    // Note: Empty strings are currently allowed by the domain layer
+    // This test documents the current behavior
+
+    let cli = Cli::parse_from(&[
+        "cli", "product", "create", "--name", "", "--description", ""
+    ]);
+    let result = cli.run(user_service.clone(), product_service.clone()).await;
+    // Note: Empty strings are currently allowed by the domain layer
+    // This test documents the current behavior
+
+    // Test very long strings
+    let long_string = "a".repeat(1000);
+    let cli = Cli::parse_from(&[
+        "cli", "user", "create", "--username", &long_string, "--email", "test@example.com"
+    ]);
+    let result = cli.run(user_service.clone(), product_service.clone()).await;
+    // Note: Very long strings are currently allowed by the domain layer
+    // This test documents the current behavior
+
+    let cli = Cli::parse_from(&[
+        "cli", "product", "create", "--name", &long_string, "--description", "test"
+    ]);
+    let result = cli.run(user_service.clone(), product_service.clone()).await;
+    // Note: Very long strings are currently allowed by the domain layer
+    // This test documents the current behavior
+
+    // Test special characters
+    let special_chars = "!@#$%^&*()_+-=[]{}|;':\",./<>?";
+    let cli = Cli::parse_from(&[
+        "cli", "user", "create", "--username", special_chars, "--email", "test@example.com"
+    ]);
+    let result = cli.run(user_service.clone(), product_service.clone()).await;
+    // Note: Special characters are currently allowed by the domain layer
+    // This test documents the current behavior
+
+    Ok(())
+}
+
+// Test no command provided
+#[tokio::test]
+#[serial]
+async fn test_cli_no_command() -> Result<()> {
+    let user_repo = InMemoryUserRepository::new();
+    let product_repo = InMemoryProductRepository::new();
+    let user_service = Service::new(user_repo);
+    let product_service = Service::new(product_repo);
+
+    let cli = Cli::parse_from(&["cli"]);
+    cli.run(user_service, product_service).await?;
+
+    Ok(())
+} 
\ No newline at end of file
diff --git a/backend/crates/integration-tests/src/lib.rs b/backend/crates/integration-tests/src/lib.rs
index 0e9545d..c5caf05 100644
--- a/backend/crates/integration-tests/src/lib.rs
+++ b/backend/crates/integration-tests/src/lib.rs
@@ -12,6 +12,8 @@
 #[cfg(test)]
 pub mod api_postgres_tests;
 #[cfg(test)]
+pub mod cli_tests;
+#[cfg(test)]
 pub mod migration_tests;
 #[cfg(test)]
 pub mod performance_tests; 
\ No newline at end of file