diff --git a/backend/sync_server/src/errors.rs b/backend/sync_server/src/errors.rs
new file mode 100644
index 0000000..4dc778d
--- /dev/null
+++ b/backend/sync_server/src/errors.rs
@@ -0,0 +1,57 @@
+use axum::{
+    http::StatusCode,
+    response::{IntoResponse, Response},
+};
+use thiserror::Error;
+
+#[derive(Error, Debug)]
+pub enum SyncServerError {
+    #[error("Initialisation error: {0}")]
+    InitError(#[source] anyhow::Error),
+
+    #[error("Client error: {0}")]
+    ClientError(#[source] anyhow::Error),
+
+    #[error("Server error: {0}")]
+    ServerError(#[source] anyhow::Error),
+
+    #[error("Not found: {0}")]
+    NotFound(#[source] anyhow::Error),
+
+    #[error("Permission denier error: {0}")]
+    PermissionDeniedError(#[source] anyhow::Error),
+}
+
+impl IntoResponse for SyncServerError {
+    fn into_response(self) -> Response {
+        let body = self.to_string();
+
+        match self {
+            Self::InitError(_) => (StatusCode::INTERNAL_SERVER_ERROR, body).into_response(),
+            Self::ClientError(_) => (StatusCode::BAD_REQUEST, body).into_response(),
+            Self::ServerError(_) => (StatusCode::INTERNAL_SERVER_ERROR, body).into_response(),
+            Self::NotFound(_) => (StatusCode::NOT_FOUND, body).into_response(),
+            Self::PermissionDeniedError(_) => (StatusCode::FORBIDDEN, body).into_response(),
+        }
+    }
+}
+
+pub fn init_error(error: anyhow::Error) -> SyncServerError {
+    SyncServerError::InitError(error)
+}
+
+pub fn server_error(error: anyhow::Error) -> SyncServerError {
+    SyncServerError::ServerError(error)
+}
+
+pub fn client_error(error: anyhow::Error) -> SyncServerError {
+    SyncServerError::ClientError(error)
+}
+
+pub fn not_found_error(error: anyhow::Error) -> SyncServerError {
+    SyncServerError::NotFound(error)
+}
+
+pub fn permission_denied_error(error: anyhow::Error) -> SyncServerError {
+    SyncServerError::PermissionDeniedError(error)
+}