diff --git a/src/main/core/config-ext.c b/src/main/core/config-ext.c
index e79448f..51efe63 100644
--- a/src/main/core/config-ext.c
+++ b/src/main/core/config-ext.c
@@ -129,4 +129,269 @@ void bt_core_config_ext_net_addr_get(const bt_core_config_t *config, const char
     if (!net_str_parse(buffer, addr)) {
         log_fatal("Cannot parse server address: %s", buffer);
     }
+}
+
+bool bt_core_config_ext_s8_optional_get(
+    const bt_core_config_t *config, const char *path, int8_t *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_s8_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    }
+}
+
+bool bt_core_config_ext_u8_optional_get(
+    const bt_core_config_t *config, const char *path, uint8_t *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_u8_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_s16_optional_get(
+    const bt_core_config_t *config, const char *path, int16_t *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_s16_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_u16_optional_get(
+    const bt_core_config_t *config, const char *path, uint16_t *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_u16_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_s32_optional_get(
+    const bt_core_config_t *config, const char *path, int32_t *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_s32_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_u32_optional_get(
+    const bt_core_config_t *config, const char *path, uint32_t *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_u32_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_s64_optional_get(
+    const bt_core_config_t *config, const char *path, int64_t *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_s64_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_u64_optional_get(
+    const bt_core_config_t *config, const char *path, uint64_t *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_u64_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_float_optional_get(
+    const bt_core_config_t *config, const char *path, float *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_float_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_double_optional_get(
+    const bt_core_config_t *config, const char *path, double *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_double_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_bool_optional_get(
+    const bt_core_config_t *config, const char *path, bool *value)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_bool_get(config, path, value);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_bin_optional_get(
+    const bt_core_config_t *config, const char *path, void *value, size_t len)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_bin_get(config, path, value, len);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_str_optional_get(
+    const bt_core_config_t *config, const char *path, char *value, size_t len)
+{
+    bt_core_config_result_t result;
+
+    result = bt_core_config_str_get(config, path, value, len);
+
+    switch (result) {
+        case BT_CORE_CONFIG_RESULT_SUCCESS:
+            return true;
+        case BT_CORE_CONFIG_RESULT_VALUE_NOT_FOUND:
+            return false;
+        default:
+            bt_core_config_fatal_on_error(result, path);
+            // Should not reach
+            return false;
+    } 
+}
+
+bool bt_core_config_ext_net_addr_optional_get(const bt_core_config_t *config, const char *path, struct net_addr *addr)
+{
+    char buffer[1024];
+    bool result;
+
+    result = bt_core_config_ext_str_optional_get(config, path, buffer, sizeof(buffer));
+
+    if (!result) {
+        return false;
+    }
+
+    if (!net_str_parse(buffer, addr)) {
+        log_fatal("Cannot parse server address: %s", buffer);
+    }
+
+    return true;
 }
\ No newline at end of file
diff --git a/src/main/core/config-ext.h b/src/main/core/config-ext.h
index 09acf46..e6063ce 100644
--- a/src/main/core/config-ext.h
+++ b/src/main/core/config-ext.h
@@ -33,4 +33,32 @@ void bt_core_config_ext_str_get(
     const bt_core_config_t *config, const char *path, char *value, size_t len);
 void bt_core_config_ext_net_addr_get(const bt_core_config_t *config, const char *path, struct net_addr *addr);
 
+bool bt_core_config_ext_s8_optional_get(
+    const bt_core_config_t *config, const char *path, int8_t *value);
+bool bt_core_config_ext_u8_optional_get(
+    const bt_core_config_t *config, const char *path, uint8_t *value);
+bool bt_core_config_ext_s16_optional_get(
+    const bt_core_config_t *config, const char *path, int16_t *value);
+bool bt_core_config_ext_u16_optional_get(
+    const bt_core_config_t *config, const char *path, uint16_t *value);
+bool bt_core_config_ext_s32_optional_get(
+    const bt_core_config_t *config, const char *path, int32_t *value);
+bool bt_core_config_ext_u32_optional_get(
+    const bt_core_config_t *config, const char *path, uint32_t *value);
+bool bt_core_config_ext_s64_optional_get(
+    const bt_core_config_t *config, const char *path, int64_t *value);
+bool bt_core_config_ext_u64_optional_get(
+    const bt_core_config_t *config, const char *path, uint64_t *value);
+bool bt_core_config_ext_float_optional_get(
+    const bt_core_config_t *config, const char *path, float *value);
+bool bt_core_config_ext_double_optional_get(
+    const bt_core_config_t *config, const char *path, double *value);
+bool bt_core_config_ext_bool_optional_get(
+    const bt_core_config_t *config, const char *path, bool *value);
+bool bt_core_config_ext_bin_optional_get(
+    const bt_core_config_t *config, const char *path, void *value, size_t len);
+bool bt_core_config_ext_str_optional_get(
+    const bt_core_config_t *config, const char *path, char *value, size_t len);
+bool bt_core_config_ext_net_addr_optional_get(const bt_core_config_t *config, const char *path, struct net_addr *addr);
+
 #endif
\ No newline at end of file