diff --git a/pbs-api-types/src/lib.rs b/pbs-api-types/src/lib.rs
index 50072bf4..cc5103f4 100644
--- a/pbs-api-types/src/lib.rs
+++ b/pbs-api-types/src/lib.rs
@@ -1,5 +1,8 @@
 //! Basic API types used by most of the PBS code.
 
+use serde::{Deserialize, Serialize};
+
+use proxmox::api::api;
 use proxmox::api::schema::{ApiStringFormat, Schema, StringSchema};
 use proxmox::const_regex;
 
@@ -37,6 +40,7 @@ pub use userid::{Username, UsernameRef};
 pub use userid::{PROXMOX_GROUP_ID_SCHEMA, PROXMOX_TOKEN_ID_SCHEMA, PROXMOX_TOKEN_NAME_SCHEMA};
 
 pub mod upid;
+pub use upid::UPID;
 
 const_regex! {
     pub BACKUP_TYPE_REGEX = concat!(r"^(", BACKUP_TYPE_RE!(), r")$");
@@ -84,3 +88,56 @@ pub const SINGLE_LINE_COMMENT_SCHEMA: Schema = StringSchema::new("Comment (singl
     .schema();
 
 pub const BACKUP_ID_FORMAT: ApiStringFormat = ApiStringFormat::Pattern(&BACKUP_ID_REGEX);
+
+#[api(
+    properties: {
+        "upid": {
+            optional: true,
+            type: UPID,
+        },
+    },
+)]
+#[derive(Clone, Serialize, Deserialize)]
+#[serde(rename_all = "kebab-case")]
+/// Garbage collection status.
+pub struct GarbageCollectionStatus {
+    pub upid: Option<String>,
+    /// Number of processed index files.
+    pub index_file_count: usize,
+    /// Sum of bytes referred by index files.
+    pub index_data_bytes: u64,
+    /// Bytes used on disk.
+    pub disk_bytes: u64,
+    /// Chunks used on disk.
+    pub disk_chunks: usize,
+    /// Sum of removed bytes.
+    pub removed_bytes: u64,
+    /// Number of removed chunks.
+    pub removed_chunks: usize,
+    /// Sum of pending bytes (pending removal - kept for safety).
+    pub pending_bytes: u64,
+    /// Number of pending chunks (pending removal - kept for safety).
+    pub pending_chunks: usize,
+    /// Number of chunks marked as .bad by verify that have been removed by GC.
+    pub removed_bad: usize,
+    /// Number of chunks still marked as .bad after garbage collection.
+    pub still_bad: usize,
+}
+
+impl Default for GarbageCollectionStatus {
+    fn default() -> Self {
+        GarbageCollectionStatus {
+            upid: None,
+            index_file_count: 0,
+            index_data_bytes: 0,
+            disk_bytes: 0,
+            disk_chunks: 0,
+            removed_bytes: 0,
+            removed_chunks: 0,
+            pending_bytes: 0,
+            pending_chunks: 0,
+            removed_bad: 0,
+            still_bad: 0,
+        }
+    }
+}