diff --git a/src/client/connection/response/input.rs b/src/client/connection/response/input.rs
index 549b13e..0cd9857 100644
--- a/src/client/connection/response/input.rs
+++ b/src/client/connection/response/input.rs
@@ -48,6 +48,16 @@ impl Input {
         }
     }
 
+    /// Get optional message for `Self`
+    /// * if the optional message not provided by the server, return children `DEFAULT_MESSAGE`
+    pub fn message_or_default(&self) -> &str {
+        match self {
+            Self::Default(default) => default.message_or_default(),
+            Self::Sensitive(sensitive) => sensitive.message_or_default(),
+        }
+    }
+
+    /// Get header string of `Self`
     pub fn as_str(&self) -> &str {
         match self {
             Self::Default(default) => default.as_str(),
@@ -55,6 +65,7 @@ impl Input {
         }
     }
 
+    /// Get header bytes of `Self`
     pub fn as_bytes(&self) -> &[u8] {
         match self {
             Self::Default(default) => default.as_bytes(),
diff --git a/src/client/connection/response/input/default.rs b/src/client/connection/response/input/default.rs
index 93143f7..9b9f096 100644
--- a/src/client/connection/response/input/default.rs
+++ b/src/client/connection/response/input/default.rs
@@ -4,6 +4,11 @@ pub use error::Error;
 /// [Input Expected](https://geminiprotocol.net/docs/protocol-specification.gmi#status-10) status code
 pub const CODE: &[u8] = b"10";
 
+/// Default message if the optional value was not provided by the server
+/// * useful to skip match cases in external applications,
+///   by using `super::message_or_default` method.
+pub const DEFAULT_MESSAGE: &str = "Input expected";
+
 /// Hold header `String` for [Input Expected](https://geminiprotocol.net/docs/protocol-specification.gmi#status-10) status code
 /// * this response type does not contain body data
 /// * the header member is closed to require valid construction
@@ -34,10 +39,18 @@ impl Default {
         self.0.get(2..).map(|s| s.trim()).filter(|x| !x.is_empty())
     }
 
+    /// Get optional message for `Self`
+    /// * if the optional message not provided by the server, return `DEFAULT_MESSAGE`
+    pub fn message_or_default(&self) -> &str {
+        self.message().unwrap_or(DEFAULT_MESSAGE)
+    }
+
+    /// Get header string of `Self`
     pub fn as_str(&self) -> &str {
         &self.0
     }
 
+    /// Get header bytes of `Self`
     pub fn as_bytes(&self) -> &[u8] {
         self.0.as_bytes()
     }
@@ -48,14 +61,17 @@ fn test() {
     // ok
     let default = Default::from_utf8("10 Default\r\n".as_bytes()).unwrap();
     assert_eq!(default.message(), Some("Default"));
+    assert_eq!(default.message_or_default(), "Default");
     assert_eq!(default.as_str(), "10 Default\r\n");
+    assert_eq!(default.as_bytes(), "10 Default\r\n".as_bytes());
 
     let default = Default::from_utf8("10\r\n".as_bytes()).unwrap();
     assert_eq!(default.message(), None);
+    assert_eq!(default.message_or_default(), DEFAULT_MESSAGE);
     assert_eq!(default.as_str(), "10\r\n");
+    assert_eq!(default.as_bytes(), "10\r\n".as_bytes());
 
     // err
-    // @TODO assert!(Default::from_utf8("10Fail\r\n".as_bytes()).is_err());
     assert!(Default::from_utf8("13 Fail\r\n".as_bytes()).is_err());
     assert!(Default::from_utf8("Fail\r\n".as_bytes()).is_err());
     assert!(Default::from_utf8("Fail".as_bytes()).is_err());
diff --git a/src/client/connection/response/input/sensitive.rs b/src/client/connection/response/input/sensitive.rs
index 9219d39..4646776 100644
--- a/src/client/connection/response/input/sensitive.rs
+++ b/src/client/connection/response/input/sensitive.rs
@@ -4,6 +4,11 @@ pub use error::Error;
 /// [Sensitive Input](https://geminiprotocol.net/docs/protocol-specification.gmi#status-11-sensitive-input) status code
 pub const CODE: &[u8] = b"11";
 
+/// Default message if the optional value was not provided by the server
+/// * useful to skip match cases in external applications,
+///   by using `super::message_or_default` method.
+pub const DEFAULT_MESSAGE: &str = "Sensitive input expected";
+
 /// Hold header `String` for [Sensitive Input](https://geminiprotocol.net/docs/protocol-specification.gmi#status-11-sensitive-input) status code
 /// * this response type does not contain body data
 /// * the header member is closed to require valid construction
@@ -34,10 +39,18 @@ impl Sensitive {
         self.0.get(2..).map(|s| s.trim()).filter(|x| !x.is_empty())
     }
 
+    /// Get optional message for `Self`
+    /// * if the optional message not provided by the server, return `DEFAULT_MESSAGE`
+    pub fn message_or_default(&self) -> &str {
+        self.message().unwrap_or(DEFAULT_MESSAGE)
+    }
+
+    /// Get header string of `Self`
     pub fn as_str(&self) -> &str {
         &self.0
     }
 
+    /// Get header bytes of `Self`
     pub fn as_bytes(&self) -> &[u8] {
         self.0.as_bytes()
     }
@@ -48,14 +61,17 @@ fn test() {
     // ok
     let sensitive = Sensitive::from_utf8("11 Sensitive\r\n".as_bytes()).unwrap();
     assert_eq!(sensitive.message(), Some("Sensitive"));
+    assert_eq!(sensitive.message_or_default(), "Sensitive");
     assert_eq!(sensitive.as_str(), "11 Sensitive\r\n");
+    assert_eq!(sensitive.as_bytes(), "11 Sensitive\r\n".as_bytes());
 
     let sensitive = Sensitive::from_utf8("11\r\n".as_bytes()).unwrap();
     assert_eq!(sensitive.message(), None);
+    assert_eq!(sensitive.message_or_default(), DEFAULT_MESSAGE);
     assert_eq!(sensitive.as_str(), "11\r\n");
+    assert_eq!(sensitive.as_bytes(), "11\r\n".as_bytes());
 
     // err
-    // @TODO assert!(Sensitive::from_utf8("11Fail\r\n".as_bytes()).is_err());
     assert!(Sensitive::from_utf8("13 Fail\r\n".as_bytes()).is_err());
     assert!(Sensitive::from_utf8("Fail\r\n".as_bytes()).is_err());
     assert!(Sensitive::from_utf8("Fail".as_bytes()).is_err());