diff --git a/.claude/skills/controller-skill/skill.md b/.claude/skills/controller-skill/skill.md
index bf8a12d..eb8b3a8 100644
--- a/.claude/skills/controller-skill/skill.md
+++ b/.claude/skills/controller-skill/skill.md
@@ -55,6 +55,11 @@ Generate a keypair and authorize a new session in a single step.
     "account": {
       "type": "string",
       "description": "Cartridge username to authorize the session for. Verifies the account exists and displays the resolved address. Also isolates session storage per account."
+    },
+    "expires": {
+      "type": "string",
+      "description": "Session expiration duration (e.g., '1min', '1hr', '1day', '7days', '1week', '1year'). Plurals supported for day/week/year. Defaults to '7days'.",
+      "default": "7days"
     }
   }
 }
@@ -72,6 +77,11 @@ controller session auth --preset loot-survivor --chain-id SN_MAIN --json
 controller session auth --preset loot-survivor --chain-id SN_MAIN --account shinobi --json
 ```
 
+**Example (custom expiration):**
+```bash
+controller session auth --preset loot-survivor --chain-id SN_MAIN --expires 1hr --json
+```
+
 **Example (policy file):**
 ```bash
 controller session auth --file policy.json --json
diff --git a/LLM_USAGE.md b/LLM_USAGE.md
index 8203e82..87453de 100644
--- a/LLM_USAGE.md
+++ b/LLM_USAGE.md
@@ -93,6 +93,8 @@ The `session auth` command combines keypair generation and session registration
 
 **`--account` flag:** Use `--account <username>` to authorize a session for a specific Cartridge account. The CLI will verify the username exists and resolve it to a controller address before proceeding. This also isolates session storage per account, enabling multiple concurrent sessions.
 
+**`--expires` flag:** Use `--expires <duration>` to set the session expiration. Accepts human-readable durations: `1min`, `1hr`, `1day`, `7days`, `1week`, `1year` (plurals supported for day/week/year). Defaults to `7days`.
+
 #### Option A: Use a Preset (Recommended)
 
 For popular games/apps, use a preset from [cartridge-gg/presets](https://github.com/cartridge-gg/presets/tree/main/configs):
@@ -113,6 +115,15 @@ controller session auth \
   --json
 ```
 
+**With custom expiration:**
+```bash
+controller session auth \
+  --preset loot-survivor \
+  --chain-id SN_MAIN \
+  --expires 1hr \
+  --json
+```
+
 Available presets: loot-survivor, influence, realms, pistols, dope-wars, and more.
 
 #### Option B: Use a Local Policy File
diff --git a/README.md b/README.md
index 8837eeb..dd463e8 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,8 @@ Or use a preset for popular games/apps:
 controller session auth --preset loot-survivor --chain-id SN_MAIN
 ```
 
+Use `--expires` to set session duration (default: `7days`). Accepts: `1min`, `1hr`, `1day`, `7days`, `1week`, `1year`.
+
 This generates a new keypair, creates an authorization URL, and automatically polls until you authorize in the browser and stores the session.
 
 ### 2. Execute Transactions
diff --git a/src/commands/session/authorize.rs b/src/commands/session/authorize.rs
index 04a5bf6..a38e871 100644
--- a/src/commands/session/authorize.rs
+++ b/src/commands/session/authorize.rs
@@ -11,6 +11,7 @@ use account_sdk::storage::{
 use serde::{Deserialize, Serialize};
 use starknet::signers::SigningKey;
 use std::fmt::Display;
+use std::time::{SystemTime, UNIX_EPOCH};
 use url::Url;
 
 #[derive(Serialize, Deserialize)]
@@ -49,12 +50,47 @@ fn default_authorized() -> bool {
     true
 }
 
+/// Parse a duration string like "1min", "1hr", "7days", "1week", "1year"
+/// and return the corresponding unix timestamp (now + duration).
+fn parse_expiration(duration: &str) -> Result<u64> {
+    let duration = duration.trim().to_lowercase();
+
+    let (num_str, unit) = duration
+        .find(|c: char| c.is_alphabetic())
+        .map(|i| (&duration[..i], &duration[i..]))
+        .ok_or_else(|| CliError::InvalidInput("Invalid duration format".to_string()))?;
+
+    let num: u64 = num_str
+        .parse()
+        .map_err(|_| CliError::InvalidInput(format!("Invalid number in duration: {num_str}")))?;
+
+    let seconds = match unit {
+        "min" | "mins" => num * 60,
+        "hr" | "hrs" => num * 3600,
+        "day" | "days" => num * 86400,
+        "week" | "weeks" => num * 604800,
+        "year" | "years" => num * 31536000,
+        _ => {
+            return Err(CliError::InvalidInput(format!(
+                "Unknown duration unit: '{unit}'. Use min, hr, day/days, week/weeks, or year/years"
+            )))
+        }
+    };
+
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .map_err(|e| CliError::InvalidInput(format!("System time error: {e}")))?;
+
+    Ok(now.as_secs() + seconds)
+}
+
 #[derive(Serialize)]
 pub struct AuthorizeOutput {
     pub authorization_url: String,
     #[serde(skip_serializing_if = "Option::is_none")]
     pub short_url: Option<String>,
     pub public_key: String,
+    pub expires: String,
     pub message: String,
 }
 
@@ -92,6 +128,7 @@ pub async fn execute(
     rpc_url: Option<String>,
     overwrite: bool,
     account: Option<&str>,
+    expires: &str,
 ) -> Result<()> {
     // Validate that either preset or file is provided
     if preset.is_none() && file.is_none() {
@@ -305,6 +342,7 @@ pub async fn execute(
     formatter.info(&format!(
         "Policies loaded: {total_contracts} contracts, {total_entrypoints} entrypoints"
     ));
+    formatter.info(&format!("Session expiration: {expires}"));
 
     // Convert to the format expected by the keychain
     let mut policies = serde_json::json!({
@@ -415,6 +453,9 @@ pub async fn execute(
         }
     };
 
+    // Parse expiration duration
+    let expires_at = parse_expiration(expires)?;
+
     // Build the authorization URL
     let mut url = Url::parse(&format!("{}/session", config.session.keychain_url))
         .map_err(|e| CliError::InvalidInput(format!("Invalid keychain URL: {e}")))?;
@@ -426,6 +467,7 @@ pub async fn execute(
             .append_pair("redirect_uri", "https://x.cartridge.gg")
             .append_pair("policies", &policies_json)
             .append_pair("rpc_url", effective_rpc_url)
+            .append_pair("expires_at", &expires_at.to_string())
             .append_pair("mode", "cli"); // Tell keychain this is CLI mode (don't include session data in redirect)
 
         if let Some(name) = account {
@@ -448,6 +490,7 @@ pub async fn execute(
         authorization_url: authorization_url.clone(),
         short_url: short_url.clone(),
         public_key: public_key.clone(),
+        expires: expires.to_string(),
         message:
             "Open this URL in your browser to authorize the session. Waiting for authorization..."
                 .to_string(),
diff --git a/src/main.rs b/src/main.rs
index 6cf2321..4f70a29 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -385,6 +385,11 @@ enum SessionCommands {
         /// Overwrite existing session without confirmation
         #[arg(long)]
         overwrite: bool,
+
+        /// Session expiration duration (e.g., '1min', '1hr', '1day', '7days', '1week', '1year')
+        /// Defaults to 7days
+        #[arg(long, default_value = "7days")]
+        expires: String,
     },
 
     /// Display current session status and information
@@ -455,6 +460,7 @@ async fn main() {
                 chain_id,
                 rpc_url,
                 overwrite,
+                expires,
             } => {
                 commands::session::authorize::execute(
                     &config,
@@ -465,6 +471,7 @@ async fn main() {
                     rpc_url,
                     overwrite,
                     account.as_deref(),
+                    &expires,
                 )
                 .await
             }