diff --git a/adapter_group.h b/adapter_group.h
new file mode 100644
index 0000000..5378598
--- /dev/null
+++ b/adapter_group.h
@@ -0,0 +1,83 @@
+// This file is under GNU General Public License 3.0
+// see LICENSE.txt
+
+#ifndef LIBPEPADAPTER_GROUP_HH
+#define LIBPEPADAPTER_GROUP_HH
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/**
+ *  <!--       query_groups()       -->
+ *
+ *  @brief          queries the list manager which groups currently exist.
+ *
+ *  @param[in]      session             associated session object
+ *  @param[out]     groups              list of pEp_identity representing
+ *                                      all group identities that currently exist.
+ *
+ *  @retval         PEP_STATUS_OK       on success
+ *                  error               on failure
+ *
+ *  @ownership      ownership of all parameters goes to the caller
+ *
+ */
+
+DYNAMIC_API PEP_STATUS query_groups(
+        PEP_SESSION session,
+        identity_list **groups
+    );
+
+/**
+ *  <!--       query_group_manager()       -->
+ *
+ *  @brief          queries the list manager for the group manager of a given group.
+ *
+ *  @param[in]      session             associated session object
+ *  @param[in]      group               pEp_Identity representing the group identity in question
+ *  @param[out]     manager             pEp_identity representing the group manager for "group"
+ *
+ *  @retval         PEP_STATUS_OK       on success
+ *                  error               on failure
+ *
+ *  @ownership      ownership of all parameters goes to the caller
+ *
+ */
+
+DYNAMIC_API PEP_STATUS query_group_manager(
+        PEP_SESSION session,
+        pEp_identity *group,
+        pEp_identity **manager
+    );
+
+/**
+ *  <!--       query_group_members()       -->
+ *
+ *  @brief          queries the list manager for all members of a given group.
+ *
+ *  @param[in]      session             associated session object
+ *  @param[in]      group               pEp_Identity representing the group identity in question
+ *  @param[out]     members             list of pEp_identity representing all the members of "group"
+ *
+ *  @retval         PEP_STATUS_OK       on success
+ *                  error               on failure
+ *
+ *  @ownership      ownership of all parameters goes to the caller
+ *
+ */
+
+DYNAMIC_API PEP_STATUS query_group_members(
+        PEP_SESSION session,
+        pEp_identity *group,
+        identity_list **members
+    );
+
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif  //LIBPEPADAPTER_GROUP_HH
\ No newline at end of file