diff --git a/Cargo.lock b/Cargo.lock
index 31601a41..7dcd1a99 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3093,6 +3093,7 @@ dependencies = [
  "thiserror",
  "tokio",
  "tracing",
+ "url",
 ]
 
 [[package]]
@@ -3743,6 +3744,7 @@ dependencies = [
  "form_urlencoded",
  "idna",
  "percent-encoding",
+ "serde",
 ]
 
 [[package]]
diff --git a/crates/synd_term/gql/schema.json b/crates/synd_term/gql/schema.json
index 1cd032e9..f398fdfc 100644
--- a/crates/synd_term/gql/schema.json
+++ b/crates/synd_term/gql/schema.json
@@ -345,7 +345,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "String",
+                  "name": "FeedUrl",
                   "ofType": null
                 }
               }
@@ -751,7 +751,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "String",
+                  "name": "FeedUrl",
                   "ofType": null
                 }
               }
@@ -771,7 +771,7 @@
             {
               "args": [],
               "deprecationReason": null,
-              "description": null,
+              "description": "Category of the feed",
               "isDeprecated": false,
               "name": "category",
               "type": {
@@ -828,6 +828,16 @@
           "name": "FeedType",
           "possibleTypes": null
         },
+        {
+          "description": null,
+          "enumValues": null,
+          "fields": null,
+          "inputFields": null,
+          "interfaces": null,
+          "kind": "SCALAR",
+          "name": "FeedUrl",
+          "possibleTypes": null
+        },
         {
           "description": "The `Float` scalar type represents signed double-precision fractional values as specified by [IEEE 754](https://en.wikipedia.org/wiki/IEEE_floating_point).",
           "enumValues": null,
@@ -1504,7 +1514,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "String",
+                  "name": "FeedUrl",
                   "ofType": null
                 }
               }
@@ -1741,7 +1751,7 @@
                 "name": null,
                 "ofType": {
                   "kind": "SCALAR",
-                  "name": "String",
+                  "name": "FeedUrl",
                   "ofType": null
                 }
               }
diff --git a/crates/synd_term/src/application/input_parser.rs b/crates/synd_term/src/application/input_parser.rs
index 0adc4025..f33ffcc0 100644
--- a/crates/synd_term/src/application/input_parser.rs
+++ b/crates/synd_term/src/application/input_parser.rs
@@ -76,7 +76,8 @@ mod feed {
         sequence::{delimited, Tuple},
         Finish, IResult, Parser,
     };
-    use synd_feed::types::Category;
+    use synd_feed::types::{Category, FeedUrl};
+    use url::Url;
 
     use super::NomError;
     use crate::{
@@ -129,11 +130,22 @@ mod feed {
         ))
     }
 
-    fn url(s: &str) -> IResult<&str, String> {
-        map(take_while(|c: char| !c.is_whitespace()), |s: &str| {
+    fn url(s: &str) -> IResult<&str, FeedUrl> {
+        let (remain, url) = map(take_while(|c: char| !c.is_whitespace()), |s: &str| {
             s.to_owned()
         })
-        .parse(s)
+        .parse(s)?;
+        match Url::parse(&url) {
+            Ok(url) => Ok((remain, FeedUrl::from(url))),
+            Err(err) => {
+                // TODO: represents parse error as type
+                tracing::warn!("Invalid url: {err}");
+                Err(nom::Err::Failure(nom::error::Error::new(
+                    remain,
+                    nom::error::ErrorKind::TakeWhile1,
+                )))
+            }
+        }
     }
 
     #[cfg(test)]
@@ -166,7 +178,7 @@ mod feed {
                 Ok((
                     "",
                     SubscribeFeedInput {
-                        url: "https://example.ymgyt.io/atom.xml".into(),
+                        url: "https://example.ymgyt.io/atom.xml".try_into().unwrap(),
                         requirement: Some(Requirement::MUST),
                         category: Some(Category::new("rust").unwrap())
                     }
diff --git a/crates/synd_term/src/application/mod.rs b/crates/synd_term/src/application/mod.rs
index 1621465d..24c27796 100644
--- a/crates/synd_term/src/application/mod.rs
+++ b/crates/synd_term/src/application/mod.rs
@@ -6,6 +6,7 @@ use ratatui::{style::palette::tailwind, widgets::Widget};
 use synd_auth::device_flow::{
     self, DeviceAccessTokenResponse, DeviceAuthorizationResponse, DeviceFlow,
 };
+use synd_feed::types::FeedUrl;
 use tokio::time::{Instant, Sleep};
 
 use crate::{
@@ -630,7 +631,7 @@ impl Application {
         self.jobs.futures.push(fut);
     }
 
-    fn unsubscribe_feed(&mut self, url: String) {
+    fn unsubscribe_feed(&mut self, url: FeedUrl) {
         let client = self.client.clone();
         let request_seq = self.in_flight.add(RequestId::UnsubscribeFeed);
         let fut = async move {
diff --git a/crates/synd_term/src/client/mod.rs b/crates/synd_term/src/client/mod.rs
index 1706db9f..1eb87a5b 100644
--- a/crates/synd_term/src/client/mod.rs
+++ b/crates/synd_term/src/client/mod.rs
@@ -27,7 +27,7 @@ pub mod query;
 #[derive(Error, Debug)]
 pub enum SubscribeFeedError {
     #[error("invalid feed url: `{feed_url}` ({message})`")]
-    InvalidFeedUrl { feed_url: String, message: String },
+    InvalidFeedUrl { feed_url: FeedUrl, message: String },
     #[error("internal error: {0}")]
     Internal(anyhow::Error),
 }
@@ -118,7 +118,7 @@ impl Client {
     }
 
     #[tracing::instrument(skip(self))]
-    pub async fn unsubscribe_feed(&self, url: String) -> anyhow::Result<()> {
+    pub async fn unsubscribe_feed(&self, url: FeedUrl) -> anyhow::Result<()> {
         let var = mutation::unsubscribe_feed::Variables {
             unsubscribe_input: mutation::unsubscribe_feed::UnsubscribeFeedInput { url },
         };
diff --git a/crates/synd_term/src/client/mutation.rs b/crates/synd_term/src/client/mutation.rs
index 50f0a37f..40653775 100644
--- a/crates/synd_term/src/client/mutation.rs
+++ b/crates/synd_term/src/client/mutation.rs
@@ -16,6 +16,7 @@ pub mod subscribe_feed {
     #[allow(dead_code)]
     type ID = String;
     type Category = crate::client::scalar::Category;
+    type FeedUrl = crate::client::scalar::FeedUrl;
     type Rfc3339Time = crate::client::scalar::Rfc3339Time;
     #[derive(Clone, Debug, Eq, PartialEq)]
     pub enum FeedType {
@@ -112,7 +113,7 @@ pub mod subscribe_feed {
     }
     #[derive(Serialize, Debug, Clone, PartialEq, Eq)]
     pub struct SubscribeFeedInput {
-        pub url: String,
+        pub url: FeedUrl,
         pub requirement: Option<Requirement>,
         pub category: Option<Category>,
     }
@@ -128,7 +129,7 @@ pub mod subscribe_feed {
         #[serde(rename = "type")]
         pub type_: FeedType,
         pub title: Option<String>,
-        pub url: String,
+        pub url: FeedUrl,
         pub updated: Option<Rfc3339Time>,
         #[serde(rename = "websiteUrl")]
         pub website_url: Option<String>,
@@ -227,6 +228,7 @@ pub mod unsubscribe_feed {
     type Int = i64;
     #[allow(dead_code)]
     type ID = String;
+    type FeedUrl = crate::client::scalar::FeedUrl;
     #[derive(Clone, Debug, Eq, PartialEq)]
     pub enum ResponseCode {
         OK,
@@ -260,7 +262,7 @@ pub mod unsubscribe_feed {
     }
     #[derive(Serialize, Debug, Clone, PartialEq, Eq)]
     pub struct UnsubscribeFeedInput {
-        pub url: String,
+        pub url: FeedUrl,
     }
     #[derive(Serialize, Debug, Clone, PartialEq, Eq)]
     pub struct Variables {
diff --git a/crates/synd_term/src/client/query.rs b/crates/synd_term/src/client/query.rs
index b9ccda0e..37fb87ac 100644
--- a/crates/synd_term/src/client/query.rs
+++ b/crates/synd_term/src/client/query.rs
@@ -16,6 +16,7 @@ pub mod subscription {
     #[allow(dead_code)]
     type ID = String;
     type Category = crate::client::scalar::Category;
+    type FeedUrl = crate::client::scalar::FeedUrl;
     type Rfc3339Time = crate::client::scalar::Rfc3339Time;
     #[derive(Clone, Debug, Eq, PartialEq)]
     pub enum FeedType {
@@ -91,7 +92,7 @@ pub mod subscription {
         #[serde(rename = "type")]
         pub type_: FeedType,
         pub title: Option<String>,
-        pub url: String,
+        pub url: FeedUrl,
         pub updated: Option<Rfc3339Time>,
         #[serde(rename = "websiteUrl")]
         pub website_url: Option<String>,
@@ -184,6 +185,7 @@ pub mod entries {
     #[allow(dead_code)]
     type ID = String;
     type Category = crate::client::scalar::Category;
+    type FeedUrl = crate::client::scalar::FeedUrl;
     type Rfc3339Time = crate::client::scalar::Rfc3339Time;
     #[derive(Clone, Debug, Eq, PartialEq)]
     pub enum Requirement {
@@ -233,7 +235,7 @@ pub mod entries {
     #[derive(Deserialize, Debug, Clone, PartialEq, Eq)]
     pub struct FeedMeta {
         pub title: Option<String>,
-        pub url: String,
+        pub url: FeedUrl,
         pub requirement: Option<Requirement>,
         pub category: Option<Category>,
     }
@@ -288,6 +290,7 @@ pub mod export_subscription {
     type Int = i64;
     #[allow(dead_code)]
     type ID = String;
+    type FeedUrl = crate::client::scalar::FeedUrl;
     #[derive(Serialize, Debug, Clone, PartialEq, Eq)]
     pub struct Variables {
         pub after: Option<String>,
@@ -318,7 +321,7 @@ pub mod export_subscription {
     #[derive(Deserialize, Debug, Clone, PartialEq, Eq)]
     pub struct ExportSubscriptionOutputFeedsNodes {
         pub title: Option<String>,
-        pub url: String,
+        pub url: FeedUrl,
     }
 }
 impl graphql_client::GraphQLQuery for ExportSubscription {
diff --git a/crates/synd_term/src/client/scalar.rs b/crates/synd_term/src/client/scalar.rs
index 5a3dce58..6ceb42be 100644
--- a/crates/synd_term/src/client/scalar.rs
+++ b/crates/synd_term/src/client/scalar.rs
@@ -1,2 +1,3 @@
 pub type Category = synd_feed::types::Category<'static>;
+pub type FeedUrl = synd_feed::types::FeedUrl;
 pub type Rfc3339Time = String;
diff --git a/crates/synd_term/src/command.rs b/crates/synd_term/src/command.rs
index 202166df..f909976b 100644
--- a/crates/synd_term/src/command.rs
+++ b/crates/synd_term/src/command.rs
@@ -1,6 +1,6 @@
 use std::fmt::Display;
 use synd_auth::device_flow::{DeviceAccessTokenResponse, DeviceAuthorizationResponse};
-use synd_feed::types::Category;
+use synd_feed::types::{Category, FeedUrl};
 
 use crate::{
     application::{Direction, ListAction, RequestSequence},
@@ -48,14 +48,14 @@ pub enum Command {
         input: SubscribeFeedInput,
     },
     UnsubscribeFeed {
-        url: String,
+        url: FeedUrl,
     },
     CompleteSubscribeFeed {
         feed: Feed,
         request_seq: RequestSequence,
     },
     CompleteUnsubscribeFeed {
-        url: String,
+        url: FeedUrl,
         request_seq: RequestSequence,
     },
     FetchSubscription {
diff --git a/crates/synd_term/src/types/mod.rs b/crates/synd_term/src/types/mod.rs
index cf3dcae0..573bb467 100644
--- a/crates/synd_term/src/types/mod.rs
+++ b/crates/synd_term/src/types/mod.rs
@@ -1,7 +1,7 @@
 use chrono::DateTime;
 use schemars::JsonSchema;
 use serde::Serialize;
-use synd_feed::types::{Category, FeedType, Requirement};
+use synd_feed::types::{Category, FeedType, FeedUrl, Requirement};
 
 use crate::{
     client::{
@@ -92,7 +92,7 @@ impl EntryMeta {
 pub struct Feed {
     pub r#type: Option<FeedType>,
     pub title: Option<String>,
-    pub url: String,
+    pub url: FeedUrl,
     pub updated: Option<Time>,
     pub links: Vec<Link>,
     pub website_url: Option<String>,
@@ -184,7 +184,7 @@ pub struct Entry {
     pub website_url: Option<String>,
     pub summary: Option<String>,
     pub feed_title: Option<String>,
-    pub feed_url: String,
+    pub feed_url: FeedUrl,
     requirement: Option<Requirement>,
     category: Option<Category<'static>>,
 }
@@ -238,7 +238,7 @@ impl From<query::export_subscription::ExportSubscriptionOutputFeedsNodes> for Ex
     fn from(v: query::export_subscription::ExportSubscriptionOutputFeedsNodes) -> Self {
         Self {
             title: v.title,
-            url: v.url,
+            url: v.url.to_string(),
         }
     }
 }
diff --git a/crates/synd_term/src/ui/components/entries.rs b/crates/synd_term/src/ui/components/entries.rs
index bdcb88a1..60021cb1 100644
--- a/crates/synd_term/src/ui/components/entries.rs
+++ b/crates/synd_term/src/ui/components/entries.rs
@@ -18,6 +18,7 @@ use ratatui::{
         ScrollbarState, StatefulWidget, Table, TableState, Widget, Wrap,
     },
 };
+use synd_feed::types::FeedUrl;
 
 pub struct Entries {
     selected_entry_index: usize,
@@ -59,8 +60,8 @@ impl Entries {
             .collect();
     }
 
-    pub fn remove_unsubscribed_entries(&mut self, url: &str) {
-        self.entries.retain(|entry| entry.feed_url != url);
+    pub fn remove_unsubscribed_entries(&mut self, url: &FeedUrl) {
+        self.entries.retain(|entry| &entry.feed_url != url);
         self.apply_filter();
     }
 
diff --git a/crates/synd_term/src/ui/components/subscription.rs b/crates/synd_term/src/ui/components/subscription.rs
index 7e32129a..bd60a0e9 100644
--- a/crates/synd_term/src/ui/components/subscription.rs
+++ b/crates/synd_term/src/ui/components/subscription.rs
@@ -11,7 +11,7 @@ use ratatui::{
         ScrollbarOrientation, ScrollbarState, StatefulWidget, Table, TableState, Widget,
     },
 };
-use synd_feed::types::FeedType;
+use synd_feed::types::{FeedType, FeedUrl};
 
 use crate::{
     application::{Direction, IndexOutOfRange, ListAction},
@@ -45,8 +45,8 @@ impl Subscription {
         !self.feeds.is_empty()
     }
 
-    pub fn is_already_subscribed(&self, url: &str) -> bool {
-        self.feeds.iter().any(|feed| feed.url == url)
+    pub fn is_already_subscribed(&self, url: &FeedUrl) -> bool {
+        self.feeds.iter().any(|feed| &feed.url == url)
     }
 
     pub fn selected_feed(&self) -> Option<&types::Feed> {
@@ -87,8 +87,8 @@ impl Subscription {
         self.apply_filter();
     }
 
-    pub fn remove_unsubscribed_feed(&mut self, url: &str) {
-        self.feeds.retain(|feed_meta| feed_meta.url != url);
+    pub fn remove_unsubscribed_feed(&mut self, url: &FeedUrl) {
+        self.feeds.retain(|feed_meta| &feed_meta.url != url);
         self.apply_filter();
         self.move_selection(&Direction::Up);
     }