diff --git a/pbs-api-types/src/lib.rs b/pbs-api-types/src/lib.rs
index f9fe5cfb..c07699d1 100644
--- a/pbs-api-types/src/lib.rs
+++ b/pbs-api-types/src/lib.rs
@@ -146,6 +146,36 @@ pub const CERT_FINGERPRINT_SHA256_SCHEMA: Schema =
         .format(&FINGERPRINT_SHA256_FORMAT)
         .schema();
 
+pub const PRUNE_SCHEMA_KEEP_DAILY: Schema = IntegerSchema::new(
+    "Number of daily backups to keep.")
+    .minimum(1)
+    .schema();
+
+pub const PRUNE_SCHEMA_KEEP_HOURLY: Schema = IntegerSchema::new(
+    "Number of hourly backups to keep.")
+    .minimum(1)
+    .schema();
+
+pub const PRUNE_SCHEMA_KEEP_LAST: Schema = IntegerSchema::new(
+    "Number of backups to keep.")
+    .minimum(1)
+    .schema();
+
+pub const PRUNE_SCHEMA_KEEP_MONTHLY: Schema = IntegerSchema::new(
+    "Number of monthly backups to keep.")
+    .minimum(1)
+    .schema();
+
+pub const PRUNE_SCHEMA_KEEP_WEEKLY: Schema = IntegerSchema::new(
+    "Number of weekly backups to keep.")
+    .minimum(1)
+    .schema();
+
+pub const PRUNE_SCHEMA_KEEP_YEARLY: Schema = IntegerSchema::new(
+    "Number of yearly backups to keep.")
+    .minimum(1)
+    .schema();
+
 pub const PROXMOX_SAFE_ID_FORMAT: ApiStringFormat =
     ApiStringFormat::Pattern(&PROXMOX_SAFE_ID_REGEX);