diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..5afd867
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,55 @@
+use std::{io, env, fmt, error::Error};
+use toml::{self, de};
+
+#[derive(Debug)]
+pub enum WsError {
+    Reqwest(reqwest::Error),
+    Url(url::ParseError),
+    Io(io::Error),
+    Toml(de::Error),
+    Var(env::VarError),
+}
+
+impl From<url::ParseError> for WsError {
+    fn from(value: url::ParseError) -> Self {
+        Self::Url(value)
+    }
+}
+
+impl From<reqwest::Error> for WsError {
+    fn from(value: reqwest::Error) -> Self {
+        Self::Reqwest(value)
+    }
+}
+
+impl From<io::Error> for WsError {
+    fn from(value: io::Error) -> Self {
+        Self::Io(value)
+    }
+}
+
+impl From<toml::de::Error> for WsError {
+    fn from(value: toml::de::Error) -> Self {
+        Self::Toml(value)
+    }
+}
+
+impl From<env::VarError> for WsError {
+    fn from(value: env::VarError) -> Self {
+        Self::Var(value)
+    }
+}
+
+impl Error for WsError {}
+
+impl fmt::Display for WsError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            WsError::Reqwest(e) => write!(f, "reqwest error: {}", e),
+            WsError::Url(e) => write!(f, "url error: {}", e),
+            WsError::Io(e) => write!(f, "io error: {}", e),
+            WsError::Toml(e) => write!(f, "toml error: {}", e),
+            WsError::Var(e) => write!(f, "var error: {}", e),
+        }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index bcfc123..b7e5fb2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -14,10 +14,10 @@ use prometheus::{
 };
 use reqwest::header::USER_AGENT;
 use serde::Deserialize;
+use vrchat_prometheus_adapter::WsError;
 use std::collections::HashMap;
-use std::error::Error;
 use std::sync::OnceLock;
-use std::{env, fmt, fs, io};
+use std::{env, fs};
 use url::Url;
 
 static PLAYER_COUNT: OnceLock<GaugeVec> = OnceLock::new();
@@ -26,59 +26,6 @@ static WORLD_VISITS: OnceLock<IntCounterVec> = OnceLock::new();
 static WORLD_OCCUPANTS: OnceLock<GaugeVec> = OnceLock::new();
 static WORLD_FAVORITES: OnceLock<IntCounterVec> = OnceLock::new();
 
-#[derive(Debug)]
-enum WsError {
-    Reqwest(reqwest::Error),
-    Url(url::ParseError),
-    Io(io::Error),
-    Toml(toml::de::Error),
-    Var(env::VarError),
-}
-
-impl From<url::ParseError> for WsError {
-    fn from(value: url::ParseError) -> Self {
-        Self::Url(value)
-    }
-}
-
-impl From<reqwest::Error> for WsError {
-    fn from(value: reqwest::Error) -> Self {
-        Self::Reqwest(value)
-    }
-}
-
-impl From<io::Error> for WsError {
-    fn from(value: io::Error) -> Self {
-        Self::Io(value)
-    }
-}
-
-impl From<toml::de::Error> for WsError {
-    fn from(value: toml::de::Error) -> Self {
-        Self::Toml(value)
-    }
-}
-
-impl From<env::VarError> for WsError {
-    fn from(value: env::VarError) -> Self {
-        Self::Var(value)
-    }
-}
-
-impl Error for WsError {}
-
-impl fmt::Display for WsError {
-    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
-        match self {
-            WsError::Reqwest(e) => write!(f, "reqwest error: {}", e),
-            WsError::Url(e) => write!(f, "url error: {}", e),
-            WsError::Io(e) => write!(f, "io error: {}", e),
-            WsError::Toml(e) => write!(f, "toml error: {}", e),
-            WsError::Var(e) => write!(f, "var error: {}", e),
-        }
-    }
-}
-
 #[derive(Clone, Debug, Deserialize)]
 struct Config {
     /// Groups we want to track.