diff --git a/docs/api.rst b/docs/api.rst
index 3c8fe008f..2bd8af88d 100644
--- a/docs/api.rst
+++ b/docs/api.rst
@@ -888,7 +888,7 @@ Functions
 .. autocfunction:: primitives.h::z_publisher_options_default
 .. autocfunction:: primitives.h::z_publisher_put_options_default
 .. autocfunction:: primitives.h::z_publisher_delete_options_default
-.. TODO: implement .. autocfunction:: primitives.h::z_reliability_default
+.. autocfunction:: primitives.h::z_reliability_default
 
 Ownership Functions
 -------------------
diff --git a/include/zenoh-pico/api/primitives.h b/include/zenoh-pico/api/primitives.h
index ab2391092..8daea5659 100644
--- a/include/zenoh-pico/api/primitives.h
+++ b/include/zenoh-pico/api/primitives.h
@@ -1404,6 +1404,7 @@ const z_loaned_encoding_t *z_sample_encoding(const z_loaned_sample_t *sample);
  */
 z_sample_kind_t z_sample_kind(const z_loaned_sample_t *sample);
 
+#ifdef Z_FEATURE_UNSTABLE_API
 /**
  * Gets the reliability a sample was received with (unstable).
  *
@@ -1413,7 +1414,6 @@ z_sample_kind_t z_sample_kind(const z_loaned_sample_t *sample);
  * Return:
  *   The reliability wrapped as a :c:type:`z_reliability_t`.
  */
-#ifdef Z_FEATURE_UNSTABLE_API
 z_reliability_t z_sample_reliability(const z_loaned_sample_t *sample);
 #endif
 
@@ -2124,6 +2124,16 @@ void z_scout_options_default(z_scout_options_t *options);
  */
 z_result_t zp_send_join(const z_loaned_session_t *zs, const zp_send_join_options_t *options);
 
+#ifdef Z_FEATURE_UNSTABLE_API
+/**
+ * Gets the default reliability value (unstable).
+ *
+ * Return:
+ *   The reliability wrapped as a :c:type:`z_reliability_t`.
+ */
+z_reliability_t z_reliability_default(void);
+#endif
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/api/api.c b/src/api/api.c
index 982fad0a3..77941f4f3 100644
--- a/src/api/api.c
+++ b/src/api/api.c
@@ -1465,3 +1465,7 @@ z_result_t zp_send_join(const z_loaned_session_t *zs, const zp_send_join_options
     (void)(options);
     return _zp_send_join(_Z_RC_IN_VAL(zs));
 }
+
+#ifdef Z_FEATURE_UNSTABLE_API
+z_reliability_t z_reliability_default(void) { return Z_RELIABILITY_DEFAULT; }
+#endif