diff --git a/feed/mt76-vendor/src/capi.c b/feed/mt76-vendor/src/capi.c
new file mode 100644
index 0000000..5f4837c
--- /dev/null
+++ b/feed/mt76-vendor/src/capi.c
@@ -0,0 +1,108 @@
+/* Copyright (C) 2021 Mediatek Inc. */
+#define _GNU_SOURCE
+
+#include "mt76-vendor.h"
+
+static int mt76_ap_rfeatures_set_attr(struct nl_msg *msg, int argc, char **argv)
+{
+	char *val;
+
+	val = strchr(argv[0], '=');
+	if (val)
+		*(val++) = 0;
+
+	if (!strncmp(argv[0], "he_gi", 5)) {
+		nla_put_u8(msg, MTK_VENDOR_ATTR_RFEATURE_CTRL_HE_GI, strtoul(val, NULL, 0));
+	} else if (!strncmp(argv[0], "he_ltf", 6)) {
+		nla_put_u8(msg, MTK_VENDOR_ATTR_RFEATURE_CTRL_HE_LTF, strtoul(val, NULL, 0));
+	}
+
+	return 0;
+}
+
+int mt76_ap_rfeatures_set(int idx, int argc, char **argv)
+{
+	struct nl_msg *msg;
+	void *data;
+	int ret;
+
+	if (argc < 1)
+		return 1;
+
+	if (unl_genl_init(&unl, "nl80211") < 0) {
+		fprintf(stderr, "Failed to connect to nl80211\n");
+		return 2;
+	}
+
+	msg = unl_genl_msg(&unl, NL80211_CMD_VENDOR, false);
+
+	if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, idx) ||
+	    nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, MTK_NL80211_VENDOR_ID) ||
+	    nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD, MTK_NL80211_VENDOR_SUBCMD_RFEATURE_CTRL))
+		return false;
+
+	data = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA | NLA_F_NESTED);
+
+	mt76_ap_rfeatures_set_attr(msg, argc, argv);
+
+	nla_nest_end(msg, data);
+
+	ret = unl_genl_request(&unl, msg, NULL, NULL);
+	if (ret)
+		fprintf(stderr, "nl80211 call failed: %s\n", strerror(-ret));
+
+	unl_free(&unl);
+
+	return ret;
+}
+
+static int mt76_ap_wireless_set_attr(struct nl_msg *msg, int argc, char **argv)
+{
+	char *val;
+
+	val = strchr(argv[0], '=');
+	if (val)
+		*(val++) = 0;
+
+	if (!strncmp(argv[0], "fixed_mcs", 9)) {
+		nla_put_u8(msg, MTK_VENDOR_ATTR_WIRELESS_CTRL_FIXED_MCS, strtoul(val, NULL, 0));
+	}
+
+	return 0;
+}
+
+int mt76_ap_wireless_set(int idx, int argc, char **argv)
+{
+	struct nl_msg *msg;
+	void *data;
+	int ret;
+
+	if (argc < 1)
+		return 1;
+
+	if (unl_genl_init(&unl, "nl80211") < 0) {
+		fprintf(stderr, "Failed to connect to nl80211\n");
+		return 2;
+	}
+
+	msg = unl_genl_msg(&unl, NL80211_CMD_VENDOR, false);
+
+	if (nla_put_u32(msg, NL80211_ATTR_IFINDEX, idx) ||
+	    nla_put_u32(msg, NL80211_ATTR_VENDOR_ID, MTK_NL80211_VENDOR_ID) ||
+	    nla_put_u32(msg, NL80211_ATTR_VENDOR_SUBCMD, MTK_NL80211_VENDOR_SUBCMD_WIRELESS_CTRL))
+		return false;
+
+	data = nla_nest_start(msg, NL80211_ATTR_VENDOR_DATA | NLA_F_NESTED);
+
+	mt76_ap_wireless_set_attr(msg, argc, argv);
+
+	nla_nest_end(msg, data);
+
+	ret = unl_genl_request(&unl, msg, NULL, NULL);
+	if (ret)
+		fprintf(stderr, "nl80211 call failed: %s\n", strerror(-ret));
+
+	unl_free(&unl);
+
+	return ret;
+}