diff --git a/api/rust/examples/example_config.rs b/api/rust/examples/example_config.rs
index bb312c1..53ec9cb 100644
--- a/api/rust/examples/example_config.rs
+++ b/api/rust/examples/example_config.rs
@@ -2,9 +2,6 @@ use pinnacle_api::prelude::*;
 use pinnacle_api::*;
 
 fn main() {
-    // let mut num = 5;
-    // let test = &mut num;
-
     pinnacle_api::connect().unwrap();
 
     let mod_key = Modifier::Ctrl;
@@ -13,65 +10,97 @@ fn main() {
 
     process::set_env("MOZ_ENABLE_WAYLAND", "1");
 
-    input::mousebind(&[mod_key], MouseButton::Left, MouseEdge::Press, move || {
-        window::begin_move(MouseButton::Left);
-    });
+    let mut callback_vec = CallbackVec::new();
+
+    input::mousebind(
+        &[mod_key],
+        MouseButton::Left,
+        MouseEdge::Press,
+        move |_| {
+            window::begin_move(MouseButton::Left);
+        },
+        &mut callback_vec,
+    );
 
     input::mousebind(
         &[mod_key],
         MouseButton::Right,
         MouseEdge::Press,
-        move || {
+        move |_| {
             window::begin_resize(MouseButton::Right);
         },
+        &mut callback_vec,
     );
 
-    input::keybind(&[mod_key, Modifier::Alt], 'q', pinnacle::quit);
+    input::keybind(
+        &[mod_key, Modifier::Alt],
+        'q',
+        |_| pinnacle::quit(),
+        &mut callback_vec,
+    );
 
-    input::keybind(&[mod_key, Modifier::Alt], 'c', move || {
-        if let Some(window) = window::get_focused() {
-            window.close();
-        }
-    });
+    input::keybind(
+        &[mod_key, Modifier::Alt],
+        'c',
+        move |_| {
+            if let Some(window) = window::get_focused() {
+                window.close();
+            }
+        },
+        &mut callback_vec,
+    );
 
-    input::keybind(&[mod_key], xkbcommon::xkb::keysyms::KEY_Return, move || {
-        process::spawn(vec![terminal]).unwrap();
-    });
+    input::keybind(
+        &[mod_key],
+        xkbcommon::xkb::keysyms::KEY_Return,
+        move |_| {
+            process::spawn(vec![terminal]).unwrap();
+        },
+        &mut callback_vec,
+    );
 
     input::keybind(
         &[mod_key, Modifier::Alt],
         xkbcommon::xkb::keysyms::KEY_space,
-        move || {
+        move |_| {
             if let Some(window) = window::get_focused() {
                 window.toggle_floating();
             }
         },
+        &mut callback_vec,
     );
 
-    input::keybind(&[mod_key], 'f', move || {
-        if let Some(window) = window::get_focused() {
-            window.toggle_fullscreen();
-        }
-    });
+    input::keybind(
+        &[mod_key],
+        'f',
+        move |_| {
+            if let Some(window) = window::get_focused() {
+                window.toggle_fullscreen();
+            }
+        },
+        &mut callback_vec,
+    );
 
-    input::keybind(&[mod_key], 'm', move || {
-        if let Some(window) = window::get_focused() {
-            window.toggle_maximized();
-        }
-    });
+    input::keybind(
+        &[mod_key],
+        'm',
+        move |_| {
+            if let Some(window) = window::get_focused() {
+                window.toggle_maximized();
+            }
+        },
+        &mut callback_vec,
+    );
 
     let tags = ["1", "2", "3", "4", "5"];
 
-    output::connect_for_all(move |output| {
-        tag::add(&output, tags.as_slice());
-        tag::get("1", Some(&output)).unwrap().toggle();
-    });
-
-    // let mut num = 5;
-    //
-    // input::keybind(&[mod_key], 'm', || {
-    //     num += 1;
-    // });
+    output::connect_for_all(
+        move |output, _| {
+            tag::add(&output, tags.as_slice());
+            tag::get("1", Some(&output)).unwrap().toggle();
+        },
+        &mut callback_vec,
+    );
 
     // let layout_cycler = tag.layout_cycler(&[
     //     Layout::MasterStack,
@@ -89,38 +118,46 @@ fn main() {
 
     for tag_name in tags.iter().map(|t| t.to_string()) {
         let t = tag_name.clone();
-        input::keybind(&[mod_key], tag_name.chars().next().unwrap(), move || {
-            tag::get(&t, None).unwrap().switch_to();
-        });
+        input::keybind(
+            &[mod_key],
+            tag_name.chars().next().unwrap(),
+            move |_| {
+                tag::get(&t, None).unwrap().switch_to();
+            },
+            &mut callback_vec,
+        );
         let t = tag_name.clone();
         input::keybind(
             &[mod_key, Modifier::Shift],
             tag_name.chars().next().unwrap(),
-            move || {
+            move |_| {
                 tag::get(&t, None).unwrap().toggle();
             },
+            &mut callback_vec,
         );
         let t = tag_name.clone();
         input::keybind(
             &[mod_key, Modifier::Alt],
             tag_name.chars().next().unwrap(),
-            move || {
+            move |_| {
                 if let Some(window) = window::get_focused() {
                     window.move_to_tag(&tag::get(&t, None).unwrap());
                 }
             },
+            &mut callback_vec,
         );
         let t = tag_name.clone();
         input::keybind(
             &[mod_key, Modifier::Shift, Modifier::Alt],
             tag_name.chars().next().unwrap(),
-            move || {
+            move |_| {
                 if let Some(window) = window::get_focused() {
                     window.toggle_tag(&tag::get(&t, None).unwrap());
                 }
             },
+            &mut callback_vec,
         );
     }
 
-    pinnacle_api::listen();
+    pinnacle_api::listen(callback_vec);
 }
diff --git a/api/rust/src/input.rs b/api/rust/src/input.rs
index 0dbe95b..bf636b2 100644
--- a/api/rust/src/input.rs
+++ b/api/rust/src/input.rs
@@ -6,7 +6,7 @@ use xkbcommon::xkb::Keysym;
 
 use crate::{
     msg::{Args, CallbackId, KeyIntOrString, Msg},
-    send_msg, CALLBACK_VEC,
+    send_msg, CallbackVec,
 };
 
 /// Set a keybind.
@@ -18,17 +18,22 @@ use crate::{
 ///     - [`char`]: A character of the key you want. This can be `a`, `~`, `@`, and so on.
 ///     - [`u32`]: The key in numeric form. You can use the keys defined in [`xkbcommon::xkb::keysyms`] for this.
 ///     - [`Keysym`]: The key in `Keysym` form, from [xkbcommon::xkb::Keysym].
-pub fn keybind<F>(modifiers: &[Modifier], key: impl Into<KeyIntOrString>, mut action: F)
-where
-    F: FnMut() + Send + 'static,
+///
+/// `action` takes in a `&mut `[`CallbackVec`] for use in the closure.
+pub fn keybind<'a, F>(
+    modifiers: &[Modifier],
+    key: impl Into<KeyIntOrString>,
+    mut action: F,
+    callback_vec: &mut CallbackVec<'a>,
+) where
+    F: FnMut(&mut CallbackVec) + 'a,
 {
-    let args_callback = move |_: Option<Args>| {
-        action();
+    let args_callback = move |_: Option<Args>, callback_vec: &mut CallbackVec<'_>| {
+        action(callback_vec);
     };
 
-    let mut callback_vec = CALLBACK_VEC.lock().unwrap();
-    let len = callback_vec.len();
-    callback_vec.push(Box::new(args_callback));
+    let len = callback_vec.callbacks.len();
+    callback_vec.callbacks.push(Box::new(args_callback));
 
     let key = key.into();
 
@@ -45,17 +50,23 @@ where
 ///
 /// The mousebind can happen either on button press or release, so you must
 /// specify which edge you desire.
-pub fn mousebind<F>(modifiers: &[Modifier], button: MouseButton, edge: MouseEdge, mut action: F)
-where
-    F: FnMut() + Send + 'static,
+///
+/// `action` takes in a `&mut `[`CallbackVec`] for use in the closure.
+pub fn mousebind<'a, F>(
+    modifiers: &[Modifier],
+    button: MouseButton,
+    edge: MouseEdge,
+    mut action: F,
+    callback_vec: &mut CallbackVec<'a>,
+) where
+    F: FnMut(&mut CallbackVec) + 'a,
 {
-    let args_callback = move |_: Option<Args>| {
-        action();
+    let args_callback = move |_: Option<Args>, callback_vec: &mut CallbackVec<'_>| {
+        action(callback_vec);
     };
 
-    let mut callback_vec = CALLBACK_VEC.lock().unwrap();
-    let len = callback_vec.len();
-    callback_vec.push(Box::new(args_callback));
+    let len = callback_vec.callbacks.len();
+    callback_vec.callbacks.push(Box::new(args_callback));
 
     let msg = Msg::SetMousebind {
         modifiers: modifiers.to_vec(),
diff --git a/api/rust/src/lib.rs b/api/rust/src/lib.rs
index 83ce972..da92307 100644
--- a/api/rust/src/lib.rs
+++ b/api/rust/src/lib.rs
@@ -46,8 +46,6 @@ use msg::{Args, CallbackId, IncomingMsg, Msg, Request, RequestResponse};
 use crate::msg::RequestId;
 
 static STREAM: OnceLock<Mutex<UnixStream>> = OnceLock::new();
-#[allow(clippy::type_complexity)]
-static CALLBACK_VEC: Mutex<Vec<Box<dyn FnMut(Option<Args>) + Send>>> = Mutex::new(Vec::new());
 lazy_static::lazy_static! {
     static ref UNREAD_CALLBACK_MSGS: Mutex<HashMap<CallbackId, IncomingMsg>> = Mutex::new(HashMap::new());
     static ref UNREAD_REQUEST_MSGS: Mutex<HashMap<RequestId, IncomingMsg>> = Mutex::new(HashMap::new());
@@ -157,7 +155,7 @@ pub fn connect() -> anyhow::Result<()> {
 /// Begin listening for messages coming from Pinnacle.
 ///
 /// This needs to be called at the very end of your `setup` function.
-pub fn listen() -> Infallible {
+pub fn listen(mut callback_vec: CallbackVec) -> Infallible {
     loop {
         let mut unread_callback_msgs = UNREAD_CALLBACK_MSGS.lock().unwrap();
 
@@ -168,11 +166,18 @@ pub fn listen() -> Infallible {
             let IncomingMsg::CallCallback { callback_id, args } = entry.remove() else {
                 unreachable!();
             };
-            let mut callback_vec = CALLBACK_VEC.lock().unwrap();
-            let Some(callback) = callback_vec.get_mut(callback_id.0 as usize) else {
-                unreachable!();
-            };
-            callback(args);
+
+            // Take the callback out and replace it with a dummy callback
+            // to allow callback_vec to be used mutably below.
+            let mut callback = std::mem::replace(
+                &mut callback_vec.callbacks[callback_id.0 as usize],
+                Box::new(|_, _| {}),
+            );
+
+            callback(args, &mut callback_vec);
+
+            // Put it back.
+            callback_vec.callbacks[callback_id.0 as usize] = callback;
         }
 
         let incoming_msg = read_msg(None);
@@ -181,11 +186,43 @@ pub fn listen() -> Infallible {
             unreachable!();
         };
 
-        let mut callback_vec = CALLBACK_VEC.lock().unwrap();
-        let Some(callback) = callback_vec.get_mut(callback_id.0 as usize) else {
-            unreachable!();
-        };
+        let mut callback = std::mem::replace(
+            &mut callback_vec.callbacks[callback_id.0 as usize],
+            Box::new(|_, _| {}),
+        );
 
-        callback(args);
+        callback(args, &mut callback_vec);
+
+        callback_vec.callbacks[callback_id.0 as usize] = callback;
+    }
+}
+
+/// A wrapper around a vector that holds all of your callbacks.
+///
+/// You will need to create this before you can start calling config functions
+/// that require callbacks.
+///
+/// Because your callbacks can capture things, we need a non-static way to hold them.
+/// That's where this struct comes in.
+///
+/// Every function that needs you to provide a callback will also need you to
+/// provide a `&mut CallbackVec`. This will insert the callback for use in [`listen`].
+///
+/// Additionally, all callbacks will also take in `&mut CallbackVec`. This is so you can
+/// call functions that need it inside of other callbacks.
+///
+/// At the end of your config, you will need to call [`listen`] to begin listening for
+/// messages from Pinnacle that will call your callbacks. Here, you must in pass your
+/// `CallbackVec`.
+#[derive(Default)]
+pub struct CallbackVec<'a> {
+    #[allow(clippy::type_complexity)]
+    pub(crate) callbacks: Vec<Box<dyn FnMut(Option<Args>, &mut CallbackVec) + 'a>>,
+}
+
+impl<'a> CallbackVec<'a> {
+    /// Create a new, empty `CallbackVec`.
+    pub fn new() -> Self {
+        Default::default()
     }
 }
diff --git a/api/rust/src/output.rs b/api/rust/src/output.rs
index 4d1b07a..e94dc20 100644
--- a/api/rust/src/output.rs
+++ b/api/rust/src/output.rs
@@ -4,7 +4,7 @@ use crate::{
     msg::{Args, CallbackId, Msg, Request, RequestResponse},
     request, send_msg,
     tag::TagHandle,
-    CALLBACK_VEC,
+    CallbackVec,
 };
 
 /// A unique identifier for an output.
@@ -58,6 +58,10 @@ pub fn get_focused() -> Option<OutputHandle> {
 /// When called, `connect_for_all` will run `func` with all currently connected outputs.
 /// If a new output is connected, `func` will also be called with it.
 ///
+/// `func` takes in two parameters:
+/// - `0`: An [`OutputHandle`] you can act on.
+/// - `1`: A `&mut `[`CallbackVec`] for use in the closure.
+///
 /// This will *not* be called if it has already been called for a given connector.
 /// This means turning your monitor off and on or unplugging and replugging it *to the same port*
 /// won't trigger `func`. Plugging it in to a new port *will* trigger `func`.
@@ -66,19 +70,18 @@ pub fn get_focused() -> Option<OutputHandle> {
 /// Please note: this function will be run *after* Pinnacle processes your entire config.
 /// For example, if you define tags in `func` but toggle them directly after `connect_for_all`,
 /// nothing will happen as the tags haven't been added yet.
-pub fn connect_for_all<F>(mut func: F)
+pub fn connect_for_all<'a, F>(mut func: F, callback_vec: &mut CallbackVec<'a>)
 where
-    F: FnMut(OutputHandle) + Send + 'static,
+    F: FnMut(OutputHandle, &mut CallbackVec) + 'a,
 {
-    let args_callback = move |args: Option<Args>| {
+    let args_callback = move |args: Option<Args>, callback_vec: &mut CallbackVec<'_>| {
         if let Some(Args::ConnectForAllOutputs { output_name }) = args {
-            func(OutputHandle(OutputName(output_name)));
+            func(OutputHandle(OutputName(output_name)), callback_vec);
         }
     };
 
-    let mut callback_vec = CALLBACK_VEC.lock().unwrap();
-    let len = callback_vec.len();
-    callback_vec.push(Box::new(args_callback));
+    let len = callback_vec.callbacks.len();
+    callback_vec.callbacks.push(Box::new(args_callback));
 
     let msg = Msg::ConnectForAllOutputs {
         callback_id: CallbackId(len as u32),
diff --git a/api/rust/src/process.rs b/api/rust/src/process.rs
index c6c3830..3f7de02 100644
--- a/api/rust/src/process.rs
+++ b/api/rust/src/process.rs
@@ -2,7 +2,7 @@
 
 use crate::{
     msg::{Args, CallbackId, Msg},
-    send_msg, CALLBACK_VEC,
+    send_msg, CallbackVec,
 };
 
 /// Spawn a process.
@@ -26,11 +26,18 @@ pub fn spawn(command: Vec<&str>) -> anyhow::Result<()> {
 ///  - `1`: The process's stderr printed this line.
 ///  - `2`: The process exited with this code.
 ///  - `3`: The process exited with this message.
-pub fn spawn_with_callback<F>(command: Vec<&str>, mut callback: F) -> anyhow::Result<()>
+///  - `4`: A `&mut `[`CallbackVec`] for use inside the closure.
+///
+/// You must also pass in a mutable reference to a [`CallbackVec`] in order to store your callback.
+pub fn spawn_with_callback<'a, F>(
+    command: Vec<&str>,
+    mut callback: F,
+    callback_vec: &mut CallbackVec<'a>,
+) -> anyhow::Result<()>
 where
-    F: FnMut(Option<String>, Option<String>, Option<i32>, Option<String>) + Send + 'static,
+    F: FnMut(Option<String>, Option<String>, Option<i32>, Option<String>, &mut CallbackVec) + 'a,
 {
-    let args_callback = move |args: Option<Args>| {
+    let args_callback = move |args: Option<Args>, callback_vec: &mut CallbackVec<'_>| {
         if let Some(Args::Spawn {
             stdout,
             stderr,
@@ -38,13 +45,12 @@ where
             exit_msg,
         }) = args
         {
-            callback(stdout, stderr, exit_code, exit_msg);
+            callback(stdout, stderr, exit_code, exit_msg, callback_vec);
         }
     };
 
-    let mut callback_vec = CALLBACK_VEC.lock().unwrap();
-    let len = callback_vec.len();
-    callback_vec.push(Box::new(args_callback));
+    let len = callback_vec.callbacks.len();
+    callback_vec.callbacks.push(Box::new(args_callback));
 
     let msg = Msg::Spawn {
         command: command.into_iter().map(|s| s.to_string()).collect(),