diff --git a/src/activity.rs b/src/activity.rs
index d62e255..7da1c0e 100644
--- a/src/activity.rs
+++ b/src/activity.rs
@@ -26,7 +26,7 @@ use crate::{
     base::{AnyBase, AsBase, Base, Extends},
     markers,
     object::{ApObject, AsObject, Object},
-    primitives::OneOrMany,
+    primitives::{OneOrMany, XsdAnyUri},
     unparsed::{Unparsed, UnparsedMut, UnparsedMutExt},
 };
 use std::convert::TryFrom;
@@ -431,6 +431,28 @@ pub trait ActorAndObjectRefExt: ActorAndObjectRef {
         self.actor_field_ref()
     }
 
+    /// Check if the actor's ID is `id`
+    ///
+    /// ```rust
+    /// # fn main() -> Result<(), anyhow::Error> {
+    /// # use activitystreams_new::{
+    /// #   context,
+    /// #   activity::Create,
+    /// #   primitives::XsdAnyUri
+    /// # };
+    /// # let mut create = Create::new(context(), context());
+    /// use activitystreams_new::prelude::*;
+    ///
+    /// create.set_actor("https://example.com".parse::<XsdAnyUri>()?);
+    ///
+    /// assert!(create.actor_is(&"https://example.com".parse()?));
+    /// # Ok(())
+    /// # }
+    /// ```
+    fn actor_is(&self, id: &XsdAnyUri) -> bool {
+        self.actor().is_single_id(id)
+    }
+
     /// Set the actor for the current activity
     ///
     /// This overwrites the contents of actor
@@ -531,6 +553,28 @@ pub trait ActorAndObjectRefExt: ActorAndObjectRef {
         self.object_field_ref()
     }
 
+    /// Check if the object's ID is `id`
+    ///
+    /// ```rust
+    /// # fn main() -> Result<(), anyhow::Error> {
+    /// # use activitystreams_new::{
+    /// #   context,
+    /// #   activity::Create,
+    /// #   primitives::XsdAnyUri
+    /// # };
+    /// # let mut create = Create::new(context(), context());
+    /// use activitystreams_new::prelude::*;
+    ///
+    /// create.set_object("https://example.com".parse::<XsdAnyUri>()?);
+    ///
+    /// assert!(create.object_is(&"https://example.com".parse()?));
+    /// # Ok(())
+    /// # }
+    /// ```
+    fn object_is(&self, id: &XsdAnyUri) -> bool {
+        self.object().is_single_id(id)
+    }
+
     /// Set the object for the current activity
     ///
     /// This overwrites the contents of object
diff --git a/src/base.rs b/src/base.rs
index 5df8444..1734bab 100644
--- a/src/base.rs
+++ b/src/base.rs
@@ -1125,6 +1125,27 @@ impl AnyBase {
             .or_else(|| self.as_base().and_then(|base| base.id.as_ref()))
     }
 
+    /// Check if the current object's id matches the provided id
+    ///
+    /// ```rust
+    /// # fn main() -> Result<(), anyhow::Error> {
+    /// # use activitystreams_new::{
+    /// #   object::{kind::VideoType, Video}, base::AnyBase, prelude::*,
+    /// # };
+    /// # let mut video = Video::new();
+    /// #
+    /// video.set_id("https://example.com".parse()?);
+    ///
+    /// let any_base = AnyBase::from_extended(video)?;
+    ///
+    /// assert!(any_base.is_id(&"https://example.com".parse()?));
+    /// # Ok(())
+    /// # }
+    /// ```
+    pub fn is_id(&self, id: &XsdAnyUri) -> bool {
+        self.id() == Some(id)
+    }
+
     /// Get the kind from the current object
     ///
     /// This method only produces a value if the current object is a `Base<serde_json::Value>`
@@ -1436,6 +1457,21 @@ impl OneOrMany<AnyBase> {
         self.as_one().and_then(|one| one.id())
     }
 
+    /// Check if there's only one ID, and if it equals `id`
+    ///
+    /// ```rust
+    /// # use activitystreams_new::{base::Base, primitives::{OneOrMany, XsdAnyUri}};
+    /// # let mut base = Base::<String>::new();
+    /// # let id: XsdAnyUri = "https://example.com".parse().unwrap();
+    /// # base.id = Some(id.clone());
+    /// # let base = OneOrMany::from_base(base.into_generic().unwrap().into());
+    /// #
+    /// assert!(base.is_single_id(&id));
+    /// ```
+    pub fn is_single_id(&self, id: &XsdAnyUri) -> bool {
+        self.as_single_id() == Some(id)
+    }
+
     /// Get the kind of a single object if there is only one object
     ///
     /// ```rust