diff --git a/core/src/requests/marks.rs b/core/src/requests/marks.rs
index e8abcbc..964d58d 100644
--- a/core/src/requests/marks.rs
+++ b/core/src/requests/marks.rs
@@ -1,4 +1,4 @@
-use crate::types::{entity, game};
+use crate::types::game;
 
 use eva::{array, data, str};
 
@@ -8,18 +8,34 @@ pub struct TextEntry<I> {
     pub text: str::CompactString,
 }
 
-pub mod add {
+pub mod add_tag {
     use super::*;
 
     #[data]
-    pub enum Args {
-        Tag(str::CompactString),
-        Badge(str::CompactString),
+    pub struct Args {
+        pub tag: str::CompactString,
     }
 
     #[data]
     pub struct Ok {
-        pub id: entity::Id,
+        pub id: game::Tag,
+    }
+
+    #[data(error, display("_"))]
+    pub enum Err {}
+}
+
+pub mod add_badge {
+    use super::*;
+
+    #[data]
+    pub struct Args {
+        pub badge: str::CompactString,
+    }
+
+    #[data]
+    pub struct Ok {
+        pub id: game::Badge,
     }
 
     #[data(error, display("_"))]
@@ -48,7 +64,7 @@ pub mod list_badges {
 
     #[data]
     pub struct Args {
-        pub query: str::CompactString,
+        pub query: Option<str::CompactString>,
     }
 
     #[data]
@@ -65,7 +81,7 @@ pub mod list_tags {
 
     #[data]
     pub struct Args {
-        pub query: str::CompactString,
+        pub query: Option<str::CompactString>,
     }
 
     #[data]
diff --git a/core/src/service/api_looks.rs b/core/src/service/api_looks.rs
index d80e1e0..b90898e 100644
--- a/core/src/service/api_looks.rs
+++ b/core/src/service/api_looks.rs
@@ -29,4 +29,8 @@ impl<S: IsSession> Session<S> {project!{
     fn messages() -> messages::Messages;
 
     fn authz() -> authz::Authentication;
+
+    fn tags() -> marks::Tags;
+    fn genres() -> marks::Genres;
+    fn badges() -> marks::Badges;
 }}
diff --git a/core/src/service/marks.rs b/core/src/service/marks.rs
new file mode 100644
index 0000000..2b3c199
--- /dev/null
+++ b/core/src/service/marks.rs
@@ -0,0 +1,27 @@
+use eva::auto_impl;
+
+use crate::{
+    requests::marks::{add_badge, add_tag, list_badges, list_genres, list_tags},
+    service::CallStep,
+};
+
+#[auto_impl(&mut)]
+pub trait Genres: Send + Sync {
+    fn list(
+        &mut self,
+    ) -> impl CallStep<list_genres::Args, Ok = list_genres::Ok, Err = list_genres::Err>;
+}
+
+#[auto_impl(&mut)]
+pub trait Badges: Send + Sync {
+    fn list(
+        &mut self,
+    ) -> impl CallStep<list_badges::Args, Ok = list_badges::Ok, Err = list_badges::Err>;
+    fn add(&mut self) -> impl CallStep<add_badge::Args, Ok = add_badge::Ok, Err = add_badge::Err>;
+}
+
+#[auto_impl(&mut)]
+pub trait Tags: Send + Sync {
+    fn list(&mut self) -> impl CallStep<list_tags::Args, Ok = list_tags::Ok, Err = list_tags::Err>;
+    fn add(&mut self) -> impl CallStep<add_tag::Args, Ok = add_tag::Ok, Err = add_tag::Err>;
+}
diff --git a/core/src/service/mod.rs b/core/src/service/mod.rs
index 2bd9af7..e650e95 100644
--- a/core/src/service/mod.rs
+++ b/core/src/service/mod.rs
@@ -6,6 +6,8 @@ pub use self::api_looks::Session;
 
 mod api_looks;
 
+pub mod marks;
+
 pub mod boards;
 pub mod messages;
 pub mod threads;
@@ -33,6 +35,9 @@ trait_set! {
         + games::Games
         + users::Users
         + authz::Authentication
+        + marks::Tags
+        + marks::Genres
+        + marks::Badges
     ;
 }
 
diff --git a/http/Cargo.toml b/http/Cargo.toml
index 474f1e4..685d832 100644
--- a/http/Cargo.toml
+++ b/http/Cargo.toml
@@ -4,7 +4,7 @@ version = "0.1.0"
 edition = "2024"
 
 [features]
-default = ["server", "client"]
+default = []
 client = ["dep:reqwest"]
 server = [
     "dep:axum",
diff --git a/http/src/client/marks.rs b/http/src/client/marks.rs
new file mode 100644
index 0000000..140528e
--- /dev/null
+++ b/http/src/client/marks.rs
@@ -0,0 +1,45 @@
+use super::*;
+
+use crate::requests::marks as requests;
+
+use viendesu_core::requests::marks::{add_badge, add_tag, list_badges, list_genres, list_tags};
+
+impl Genres for HttpClient {
+    fn list(
+        &mut self,
+    ) -> impl CallStep<list_genres::Args, Ok = list_genres::Ok, Err = list_genres::Err> {
+        self.do_call(Method::GET, |list_genres::Args {}| {
+            ("/genres".into(), requests::ListGenres {})
+        })
+    }
+}
+
+impl Tags for HttpClient {
+    fn list(&mut self) -> impl CallStep<list_tags::Args, Ok = list_tags::Ok, Err = list_tags::Err> {
+        self.do_call(Method::GET, |list_tags::Args { query }| {
+            ("/tags".into(), requests::ListTags { query })
+        })
+    }
+
+    fn add(&mut self) -> impl CallStep<add_tag::Args, Ok = add_tag::Ok, Err = add_tag::Err> {
+        self.do_call(Method::POST, |add_tag::Args { tag }| {
+            ("/tags".into(), requests::AddTag { text: tag })
+        })
+    }
+}
+
+impl Badges for HttpClient {
+    fn list(
+        &mut self,
+    ) -> impl CallStep<list_badges::Args, Ok = list_badges::Ok, Err = list_badges::Err> {
+        self.do_call(Method::GET, |list_badges::Args { query }| {
+            ("/badges".into(), requests::ListBadges { query })
+        })
+    }
+
+    fn add(&mut self) -> impl CallStep<add_badge::Args, Ok = add_badge::Ok, Err = add_badge::Err> {
+        self.do_call(Method::POST, |add_badge::Args { badge }| {
+            ("/badges".into(), requests::AddBadge { text: badge })
+        })
+    }
+}
diff --git a/http/src/client/mod.rs b/http/src/client/mod.rs
index 7239a54..f4ecdca 100644
--- a/http/src/client/mod.rs
+++ b/http/src/client/mod.rs
@@ -10,8 +10,15 @@ use viendesu_core::{
     errors::{self, Aux},
     requests::Response,
     service::{
-        CallStep, Session, SessionMaker, authors::Authors, authz::Authentication, boards::Boards,
-        games::Games, messages::Messages, threads::Threads, users::Users,
+        CallStep, Session, SessionMaker,
+        authors::Authors,
+        authz::Authentication,
+        boards::Boards,
+        games::Games,
+        marks::{Badges, Genres, Tags},
+        messages::Messages,
+        threads::Threads,
+        users::Users,
     },
     types::session,
 };
@@ -28,6 +35,8 @@ mod authors;
 mod games;
 mod users;
 
+mod marks;
+
 struct DoRequest<'c, P> {
     client: &'c mut HttpClient,
     method: Method,
diff --git a/http/src/requests/marks.rs b/http/src/requests/marks.rs
new file mode 100644
index 0000000..a3c2e64
--- /dev/null
+++ b/http/src/requests/marks.rs
@@ -0,0 +1,48 @@
+use eva::{data, str::CompactString};
+
+use crate::requests::status_code;
+
+use viendesu_core::requests::marks as reqs;
+
+#[data]
+pub struct AddBadge {
+    pub text: CompactString,
+}
+
+impl_req!(AddBadge => [reqs::add_badge::Ok; reqs::add_badge::Err]);
+status_code::direct!(reqs::add_badge::Ok => CREATED);
+status_code::map!(reqs::add_badge::Err => []);
+
+#[data]
+pub struct AddTag {
+    pub text: CompactString,
+}
+
+impl_req!(AddTag => [reqs::add_tag::Ok; reqs::add_tag::Err]);
+status_code::direct!(reqs::add_tag::Ok => CREATED);
+status_code::map!(reqs::add_tag::Err => []);
+
+#[data]
+pub struct ListGenres {}
+
+impl_req!(ListGenres => [reqs::list_genres::Ok; reqs::list_genres::Err]);
+status_code::direct!(reqs::list_genres::Ok => OK);
+status_code::map!(reqs::list_genres::Err => []);
+
+#[data]
+pub struct ListTags {
+    pub query: Option<CompactString>,
+}
+
+impl_req!(ListTags => [reqs::list_tags::Ok; reqs::list_tags::Err]);
+status_code::direct!(reqs::list_tags::Ok => OK);
+status_code::map!(reqs::list_tags::Err => []);
+
+#[data]
+pub struct ListBadges {
+    pub query: Option<CompactString>,
+}
+
+impl_req!(ListBadges => [reqs::list_badges::Ok; reqs::list_badges::Err]);
+status_code::direct!(reqs::list_badges::Ok => OK);
+status_code::map!(reqs::list_badges::Err => []);
diff --git a/http/src/requests/mod.rs b/http/src/requests/mod.rs
index 61f58bd..5c1f75a 100644
--- a/http/src/requests/mod.rs
+++ b/http/src/requests/mod.rs
@@ -24,6 +24,7 @@ macro_rules! impl_req {
     };
 }
 
+pub mod marks;
 pub mod users;
 
 pub mod authors;
diff --git a/http/src/server/routes.rs b/http/src/server/routes.rs
index aec09a7..df0e823 100644
--- a/http/src/server/routes.rs
+++ b/http/src/server/routes.rs
@@ -21,10 +21,90 @@ pub fn make<T: Types>(router: RouterScope<T>) -> RouterScope<T> {
         .nest("/messages", messages)
         .nest("/uploads", uploads)
         .nest("/files", files)
+        .nest("/tags", tags)
+        .nest("/badges", badges)
+        .nest("/genres", genres)
 }
 
 // == Routes ==
 
+fn genres<T: Types>(router: RouterScope<T>) -> RouterScope<T> {
+    use crate::requests::marks::ListGenres;
+
+    use viendesu_core::{requests::marks::list_genres, service::marks::Genres as _};
+
+    router.route(
+        "/",
+        get(
+            async move |mut session: SessionOf<T>, ctx: Ctx<ListGenres>| {
+                let ListGenres {} = ctx.request;
+
+                session.genres().list().call(list_genres::Args {}).await
+            },
+        ),
+    )
+}
+
+fn badges<T: Types>(router: RouterScope<T>) -> RouterScope<T> {
+    use crate::requests::marks::{AddBadge, ListBadges};
+
+    use viendesu_core::{
+        requests::marks::{add_badge, list_badges},
+        service::marks::Badges as _,
+    };
+
+    router
+        .route(
+            "/",
+            get(
+                async move |mut session: SessionOf<T>, ctx: Ctx<ListBadges>| {
+                    let ListBadges { query } = ctx.request;
+                    session
+                        .badges()
+                        .list()
+                        .call(list_badges::Args { query })
+                        .await
+                },
+            ),
+        )
+        .route(
+            "/",
+            post(async move |mut session: SessionOf<T>, ctx: Ctx<AddBadge>| {
+                let AddBadge { text } = ctx.request;
+                session
+                    .badges()
+                    .add()
+                    .call(add_badge::Args { badge: text })
+                    .await
+            }),
+        )
+}
+
+fn tags<T: Types>(router: RouterScope<T>) -> RouterScope<T> {
+    use crate::requests::marks::{AddTag, ListTags};
+
+    use viendesu_core::{
+        requests::marks::{add_tag, list_tags},
+        service::marks::Tags as _,
+    };
+
+    router
+        .route(
+            "/",
+            get(async move |mut session: SessionOf<T>, ctx: Ctx<ListTags>| {
+                let ListTags { query } = ctx.request;
+                session.tags().list().call(list_tags::Args { query }).await
+            }),
+        )
+        .route(
+            "/",
+            post(async move |mut session: SessionOf<T>, ctx: Ctx<AddTag>| {
+                let AddTag { text } = ctx.request;
+                session.tags().add().call(add_tag::Args { tag: text }).await
+            }),
+        )
+}
+
 fn users<T: Types>(router: RouterScope<T>) -> RouterScope<T> {
     use crate::requests::users::{
         BeginAuth, CheckAuth, ConfirmSignUp, FinishAuth, Get, SignIn, SignUp, Update,