diff --git a/.github/workflows/tools.yml b/.github/workflows/tools.yml
index 2adcd6c..e0c60dc 100644
--- a/.github/workflows/tools.yml
+++ b/.github/workflows/tools.yml
@@ -7,6 +7,12 @@ on:
     branches: [ master ]
 
 jobs:
+  metadata:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v7
+    - name: Check metadata
+      run: tools/metadata.py
   csv_to_ulog:
     runs-on: ubuntu-latest
     steps:
diff --git a/flix/mavlink.ino b/flix/mavlink.ino
index 6c15f1f..fd80fae 100644
--- a/flix/mavlink.ino
+++ b/flix/mavlink.ino
@@ -268,6 +268,15 @@ int handleMavlinkCommand(const void *_m) {
 		return MAV_RESULT_ACCEPTED;
 	}
 
+	if (m.command == MAV_CMD_REQUEST_MESSAGE && m.param1 == MAVLINK_MSG_ID_COMPONENT_METADATA) {
+		mavlink_message_t response;
+		mavlink_msg_component_metadata_pack(mavlinkSysId, MAV_COMP_ID_AUTOPILOT1, &response, t * 1000,
+		2566517357, // crc
+		"https://quadcopter.dev/meta/2566517357/general.json");
+		sendMessage(&response);
+		return MAV_RESULT_ACCEPTED;
+	}
+
 	if (m.command == MAV_CMD_COMPONENT_ARM_DISARM) {
 		if (m.param1 == 1 && controlThrottle > 0.05) return MAV_RESULT_DENIED; // don't arm if throttle is not low
 		armed = m.param1 == 1;
diff --git a/tools/general.json b/tools/general.json
new file mode 100644
index 0000000..eb21de3
--- /dev/null
+++ b/tools/general.json
@@ -0,0 +1,10 @@
+{
+	"version": 1,
+	"metadataTypes": [
+		{
+			"type": 1,
+			"uri": "https://quadcopter.dev/meta/3307474483/parameters.json",
+			"fileCrc": 3307474483
+		}
+	]
+}
diff --git a/tools/metadata.py b/tools/metadata.py
new file mode 100755
index 0000000..03172b2
--- /dev/null
+++ b/tools/metadata.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python3
+
+# Script for checking the metadata files
+
+import sys
+import re
+from pathlib import Path
+import json
+import zlib
+import requests
+
+
+def mavlink_crc323(data: bytes) -> int:
+    return (zlib.crc32(data, 0xFFFFFFFF) ^ 0xFFFFFFFF) & 0xFFFFFFFF
+
+
+parameter_regexp = re.compile(r'^\s+\{"(?P<name>[^"]+)",\s*&(?P<variable>[^,]+)(.*)\},?$', re.MULTILINE)
+
+parameters_source_file = Path(__file__).parent.parent / 'flix' / 'parameters.ino'
+parameters_code = parameters_source_file.read_text()
+parameters_meta_file = Path(__file__).parent / 'parameters.json'
+parameters_meta = json.loads(parameters_meta_file.read_text())
+assert parameters_meta['version'] == 1
+
+parameters = parameter_regexp.finditer(parameters_code)
+
+for parameter in parameters:
+    name = parameter.group('name')
+    variable = parameter.group('variable')
+
+    for meta in parameters_meta['parameters']:
+        name_meta = meta['name']
+        regex = re.sub(r'\{[^\}]+\}', r'.*', name_meta) # handle {n} wildcards
+        if re.fullmatch(regex, name):
+            break
+    else:
+        raise RuntimeError(f'Parameter {name} is missing in parameters.json')
+
+general_meta_file = Path(__file__).parent / 'general.json'
+general_crc = mavlink_crc323(general_meta_file.read_bytes())
+general_data = json.loads(general_meta_file.read_text())
+
+parameters_crc = mavlink_crc323(parameters_meta_file.read_bytes())
+
+general_url = f'https://quadcopter.dev/meta/{general_crc}/general.json'
+parameters_url = f'https://quadcopter.dev/meta/{parameters_crc}/parameters.json'
+
+print(f'General CRC: {general_crc}')
+print(f'Parameters CRC: {mavlink_crc323(parameters_meta_file.read_bytes())}')
+print(f'General URL: {general_url}')
+print(f'Parameters URL: {parameters_url}')
+
+code = 0
+
+assert general_data['version'] == 1
+for meta in general_data['metadataTypes']:
+    if meta['type'] == 1:
+        if meta['uri'] != parameters_url:
+            print(f'ERROR: Parameters URI should be {parameters_url}')
+            code = 1
+        if meta['fileCrc'] != parameters_crc:
+            print(f'ERROR: Parameters CRC shoule be {parameters_crc}')
+            code = 1
+    break
+else:
+    print('ERROR: Parameters metadata not found in general.json')
+    code = 1
+
+resp = requests.get(general_url, allow_redirects=True)
+resp.raise_for_status()
+assert resp.json() == general_data
+
+resp = requests.get(parameters_url, allow_redirects=True)
+resp.raise_for_status()
+assert resp.json() == parameters_meta
+
+if code == 0:
+    print('Everything is good')
+sys.exit(code)
diff --git a/tools/parameters.json b/tools/parameters.json
new file mode 100644
index 0000000..6c796a2
--- /dev/null
+++ b/tools/parameters.json
@@ -0,0 +1,192 @@
+{
+	"version": 1,
+	"parameters": [
+		{ "name": "CTL_RATE_R_P", "type": "Float", "group": "Control", "shortDesc": "Proportional gain for roll rate" },
+		{ "name": "CTL_RATE_R_I", "type": "Float", "group": "Control", "shortDesc": "Integral gain for roll rate" },
+		{ "name": "CTL_RATE_R_D", "type": "Float", "group": "Control", "shortDesc": "Derivative gain for roll rate" },
+		{ "name": "CTL_RATE_R_WU", "type": "Float", "group": "Control", "shortDesc": "Integral windup limit for roll rate" },
+		{ "name": "CTL_RATE_R_D_A", "type": "Float", "group": "Control", "shortDesc": "Low-pass filter alpha for roll rate" },
+		{ "name": "CTL_RATE_P_P", "type": "Float", "group": "Control", "shortDesc": "Proportional gain for pitch rate" },
+		{ "name": "CTL_RATE_P_I", "type": "Float", "group": "Control", "shortDesc": "Integral gain for pitch rate" },
+		{ "name": "CTL_RATE_P_D", "type": "Float", "group": "Control", "shortDesc": "Derivative gain for pitch rate" },
+		{ "name": "CTL_RATE_P_WU", "type": "Float", "group": "Control", "shortDesc": "Integral windup limit for pitch rate" },
+		{ "name": "CTL_RATE_P_D_A", "type": "Float", "group": "Control", "shortDesc": "Low-pass filter alpha for pitch rate" },
+		{ "name": "CTL_RATE_Y_P", "type": "Float", "group": "Control", "shortDesc": "Proportional gain for yaw rate" },
+		{ "name": "CTL_RATE_Y_I", "type": "Float", "group": "Control", "shortDesc": "Integral gain for yaw rate" },
+		{ "name": "CTL_RATE_Y_D", "type": "Float", "group": "Control", "shortDesc": "Derivative gain for yaw rate" },
+		{ "name": "CTL_RATE_Y_WU", "type": "Float", "group": "Control", "shortDesc": "Integral windup limit for yaw rate" },
+		{ "name": "CTL_RATE_Y_D_A", "type": "Float", "group": "Control", "shortDesc": "Low-pass filter alpha for yaw rate" },
+
+		{ "name": "CTL_RATE_P_MAX", "type": "Float", "group": "Control", "units": "rad/s", "shortDesc": "Maximum pitch rate for ACRO mode" },
+		{ "name": "CTL_RATE_R_MAX", "type": "Float", "group": "Control", "units": "rad/s", "shortDesc": "Maximum roll rate for ACRO mode" },
+		{ "name": "CTL_RATE_Y_MAX", "type": "Float", "group": "Control", "units": "rad/s", "shortDesc": "Maximum yaw rate for ACRO mode" },
+
+		{ "name": "CTL_ATT_R_P", "type": "Float", "group": "Control", "shortDesc": "Proportional gain for roll angle" },
+		{ "name": "CTL_ATT_P_P", "type": "Float", "group": "Control", "shortDesc": "Proportional gain for pitch angle" },
+		{ "name": "CTL_ATT_Y_P", "type": "Float", "group": "Control", "shortDesc": "Proportional gain for yaw angle" },
+		{ "name": "CTL_ATT_MAX", "type": "Float", "group": "Control", "units": "radians", "shortDesc": "Maximum tilt angle for STAB mode" },
+
+		{
+			"name": "CTL_FLT_MODE_{n}",
+			"type": "Float",
+			"group": "Control",
+			"shortDesc": "Flight mode for switch position {n}",
+			"values": [{ "value": 0, "description": "RAW" }, { "value": 1, "description": "ACRO" }, { "value": 2, "description": "STAB" }, { "value": 3, "description": "AUTO" }, { "value": 4, "description": "POS" }]
+		},
+
+		{
+			"name": "IMU_MODEL",
+			"type": "Float",
+			"shortDesc": "IMU sensor model",
+			"group": "IMU",
+			"increment": 1,
+			"decimalPlaces": 0,
+			"values": [{ "value": -1, "description": "Disabled"}, { "value": 1, "description": "MPU-9250"}, { "value": 2, "description": "ICM-20948"}, { "value": 3, "description": "MPU-6050"}, { "value": 4, "description": "ICM-40609-D"}],
+			"rebootRequired": true
+		},
+		{
+			"name": "IMU_BUS",
+			"type": "Float",
+			"shortDesc": "IMU bus type",
+			"group": "IMU",
+			"values": [
+				{ "value": 0, "description": "SPI" },
+				{ "value": 1, "description": "I2C" }
+			],
+			"rebootRequired": true
+		},
+		{ "name": "IMU_PIN_SCK", "type": "Float", "group": "IMU", "shortDesc": "IMU SPI SCK pin", "min": 1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "IMU_PIN_MISO", "type": "Float", "group": "IMU", "shortDesc": "IMU SPI MISO pin", "min": 1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "IMU_PIN_MOSI", "type": "Float", "group": "IMU", "shortDesc": "IMU SPI MOSI pin", "min": 1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "IMU_PIN_CS", "type": "Float", "group": "IMU", "shortDesc": "IMU SPI CS pin", "min": 1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "IMU_PIN_SDA", "type": "Float", "group": "IMU", "shortDesc": "IMU I2C SDA pin", "min": 1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "IMU_PIN_SCL", "type": "Float", "group": "IMU", "shortDesc": "IMU I2C SCL pin", "min": 1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "IMU_PIN_INT", "type": "Float", "group": "IMU", "shortDesc": "IMU interrupt pin (-1 for using timer)", "min": -1, "increment": 1, "decimalPlaces": 0 },
+
+		{ "name": "IMU_ROT_ROLL", "type": "Float", "group": "IMU", "units": "radians", "shortDesc": "IMU roll rotation" },
+		{ "name": "IMU_ROT_PITCH", "type": "Float", "group": "IMU", "units": "radians", "shortDesc": "IMU pitch rotation" },
+		{ "name": "IMU_ROT_YAW", "type": "Float", "group": "IMU", "units": "radians", "shortDesc": "IMU yaw rotation" },
+
+		{ "name": "IMU_ACC_BIAS_X", "type": "Float", "group": "IMU (Calibration)", "units": "m/s^2", "shortDesc": "Accelerometer bias X", "volatile": true },
+		{ "name": "IMU_ACC_BIAS_Y", "type": "Float", "group": "IMU (Calibration)", "units": "m/s^2", "shortDesc": "Accelerometer bias Y", "volatile": true },
+		{ "name": "IMU_ACC_BIAS_Z", "type": "Float", "group": "IMU (Calibration)", "units": "m/s^2", "shortDesc": "Accelerometer bias Z", "volatile": true },
+
+		{ "name": "IMU_ACC_SCALE_X", "type": "Float", "group": "IMU (Calibration)", "shortDesc": "Accelerometer scale X", "volatile": true },
+		{ "name": "IMU_ACC_SCALE_Y", "type": "Float", "group": "IMU (Calibration)", "shortDesc": "Accelerometer scale Y", "volatile": true },
+		{ "name": "IMU_ACC_SCALE_Z", "type": "Float", "group": "IMU (Calibration)", "shortDesc": "Accelerometer scale Z", "volatile": true },
+
+		{ "name": "IMU_GYRO_BIAS_A", "type": "Float", "group": "IMU", "shortDesc": "Alpha for gyroscope bias estimation" },
+
+		{ "name": "EST_ACC_WEIGHT", "type": "Float", "group": "Estimation", "shortDesc": "Accelerometer weight" },
+		{ "name": "EST_LVL_WEIGHT", "type": "Float", "group": "Estimation", "shortDesc": "Level weight", "decimalPlaces": 5 },
+		{ "name": "EST_RATES_LPF_A", "type": "Float", "group": "Estimation", "shortDesc": "Low-pass filter alpha for rates" },
+		{ "name": "EST_RATES_NO_F", "type": "Float", "group": "Estimation", "units": "Hz", "shortDesc": "Notch filter center frequency for rates", "min": 0, "decimalPlaces": 0 },
+		{ "name": "EST_RATES_NO_BW", "type": "Float", "group": "Estimation", "units": "Hz", "shortDesc": "Notch filter bandwidth for rates", "min": 0, "decimalPlaces": 0 },
+
+		{ "name": "MOT_PIN_FL", "type": "Float", "group": "Motors", "shortDesc": "Front-left motor pin (-1 to disabled)", "min": -1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "MOT_PIN_FR", "type": "Float", "group": "Motors", "shortDesc": "Front-right motor pin (-1 to disabled)", "min": -1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "MOT_PIN_RL", "type": "Float", "group": "Motors", "shortDesc": "Rear-left motor pin (-1 to disabled)", "min": -1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "MOT_PIN_RR", "type": "Float", "group": "Motors", "shortDesc": "Rear-right motor pin (-1 to disabled)", "min": -1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "MOT_PWM_FREQ", "type": "Float", "group": "Motors", "units": "Hz", "shortDesc": "PWM frequency", "min": 0, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "MOT_PWM_RES", "type": "Float", "group": "Motors", "units": "bits", "shortDesc": "PWM resolution", "min": 1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "MOT_PWM_STOP", "type": "Float", "group": "Motors", "units": "μs", "shortDesc": "PWM for stopping the motors (brushless motors)", "min": 0, "decimalPlaces": 0 },
+		{ "name": "MOT_PWM_MIN", "type": "Float", "group": "Motors", "units": "μs", "shortDesc": "PWM for minimum throttle (brushless motors)", "min": 0, "decimalPlaces": 0 },
+		{ "name": "MOT_PWM_MAX", "type": "Float", "group": "Motors", "units": "μs", "shortDesc": "PWM for maximum throttle (-1 for brushed motors)", "min": -1, "decimalPlaces": 0 },
+
+		{ "name": "RC_RX_PIN", "type": "Float", "group": "RC", "shortDesc": "RC receiver RX pin (-1 for disabled)", "min": -1, "increment": 1, "decimalPlaces": 0 },
+		{
+			"name": "RC_ZERO_{n}",
+			"type": "Float",
+			"group": "RC (Calibration)",
+			"shortDesc": "RC channel {n} zero PWM",
+			"units": "μs",
+			"min": 0,
+			"decimalPlaces": 0
+		},
+		{
+			"name": "RC_MAX_{n}",
+			"type": "Float",
+			"group": "RC (Calibration)",
+			"shortDesc": "RC channel {n} maximum PWM",
+			"units": "μs",
+			"min": 0,
+			"decimalPlaces": 0
+		},
+
+		{ "name": "RC_ROLL", "type": "Float", "group": "RC (Calibration)", "shortDesc": "RC roll channel", "min": 0, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "RC_PITCH", "type": "Float", "group": "RC (Calibration)", "shortDesc": "RC pitch channel", "min": 0, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "RC_THROTTLE", "type": "Float", "group": "RC (Calibration)", "shortDesc": "RC throttle channel", "min": 0, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "RC_YAW", "type": "Float", "group": "RC (Calibration)", "shortDesc": "RC yaw channel", "min": 0, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "RC_MODE", "type": "Float", "group": "RC (Calibration)", "shortDesc": "RC mode switch channel", "min": 0, "increment": 1, "decimalPlaces": 0 },
+
+		{
+			"name": "WIFI_MODE",
+			"type": "Float",
+			"group": "Wi-Fi",
+			"shortDesc": "Wi-Fi mode",
+			"values": [
+				{ "value": 0, "description": "Disabled" },
+				{ "value": 1, "description": "Access point (AP)" },
+				{ "value": 2, "description": "Client (STA)" },
+				{ "value": 3, "description": "ESP-NOW" }
+			]
+		},
+		{ "name": "WIFI_PORT_LOC", "type": "Float", "group": "Wi-Fi", "shortDesc": "Local UDP port", "min": 0, "max": 65535, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "WIFI_PORT_REM", "type": "Float", "group": "Wi-Fi", "shortDesc": "Remote UDP port", "min": 0, "max": 65535, "increment": 1, "decimalPlaces": 0 },
+		{
+			"name": "WIFI_LONG_RANGE",
+			"type": "Float",
+			"group": "Wi-Fi",
+			"shortDesc": "Long-range WiFi mode",
+			"values": [
+				{ "value": 0, "description": "Off" },
+				{ "value": 1, "description": "On" }
+			]
+		},
+		{
+			"name": "WIFI_BROADCAST",
+			"type": "Float",
+			"group": "Wi-Fi",
+			"shortDesc": "Always broadcast UDP",
+			"values": [
+				{ "value": 0, "description": "Off" },
+				{ "value": 1, "description": "On" }
+			]
+		},
+
+		{ "name": "ESPNOW_CHANNEL", "type": "Float", "group": "ESP-NOW", "shortDesc": "ESP-NOW channel", "min": 1, "max": 13, "increment": 1, "decimalPlaces": 0 },
+
+		{ "name": "MAV_SYS_ID", "type": "Float", "group": "MAVLink", "shortDesc": "MAVLink system ID", "min": 1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "MAV_RATE_SLOW", "type": "Float", "group": "MAVLink", "units": "Hz", "shortDesc": "Rate for heartbeats and battery state", "min": 0, "decimalPlaces": 0 },
+		{ "name": "MAV_RATE_FAST", "type": "Float", "group": "MAVLink", "units": "Hz", "shortDesc": "Rate for attitude, RC channels and motors state", "min": 0, "decimalPlaces": 0 },
+		{ "name": "MAV_RATE_EXTRA", "type": "Float", "group": "MAVLink", "units": "Hz", "shortDesc": "Rate for IMU data and exposed log topic", "min": 0, "decimalPlaces": 0 },
+		{ "name": "MAV_RATE_ATT", "type": "Float", "group": "MAVLink", "units": "Hz", "shortDesc": "Rate for attitude", "min": 0, "decimalPlaces": 0 },
+		{ "name": "MAV_RATE_ATT_TG", "type": "Float", "group": "MAVLink", "units": "Hz", "shortDesc": "Rate for attitude target", "min": 0, "decimalPlaces": 0 },
+		{ "name": "MAV_RATE_RC", "type": "Float", "group": "MAVLink", "units": "Hz", "shortDesc": "Rate for RC channels", "min": 0, "decimalPlaces": 0 },
+		{ "name": "MAV_RATE_MOT", "type": "Float", "group": "MAVLink", "units": "Hz", "shortDesc": "Rate for motors state", "min": 0, "decimalPlaces": 0 },
+		{ "name": "MAV_RATE_IMU", "type": "Float", "group": "MAVLink", "units": "Hz", "shortDesc": "Rate for IMU data", "min": 0, "decimalPlaces": 0 },
+		{ "name": "MAV_RATE_TOPIC", "type": "Float", "group": "MAVLink", "units": "Hz", "shortDesc": "Rate for exposed log topic", "min": 0, "decimalPlaces": 0 },
+
+		{
+			"name": "LOG_MEMORY",
+			"type": "Float",
+			"group": "Log",
+			"shortDesc": "Memory type for logging",
+			"values": [
+				{ "value": -1, "description": "Disabled" },
+				{ "value": 0, "description": "RAM" },
+				{ "value": 1, "description": "PSRAM" }
+			]
+		},
+		{ "name": "LOG_USAGE", "type": "Float", "group": "Log", "units": "norm", "shortDesc": "Percentage of memory to use for logging" },
+		{ "name": "LOG_RATE_{n}", "type": "Float", "group": "Log", "units": "Hz", "shortDesc": "Log topic {n} rate", "min": 0, "decimalPlaces": 0 },
+
+		{ "name": "PWR_VOLT_PIN", "type": "Float", "group": "Power", "shortDesc": "Voltage ADC input pin (-1 for disabled)", "min": -1, "increment": 1, "decimalPlaces": 0 },
+		{ "name": "PWR_VOLT_SCALE", "type": "Float", "group": "Power", "shortDesc": "Voltage divider scale factor" },
+		{ "name": "PWR_VOLT_LPF_A", "type": "Float", "group": "Power", "shortDesc": "Low-pass filter alpha for battery voltage" },
+
+		{ "name": "SF_RC_LOSS_TIME", "type": "Float", "group": "Safety", "units": "s", "shortDesc": "RC signal loss timeout in seconds", "min": 0, "decimalPlaces": 1 },
+		{ "name": "SF_DESCEND_TIME", "type": "Float", "group": "Safety", "units": "s", "shortDesc": "Automatic descent timeout in seconds", "min": 0, "decimalPlaces": 1 },
+		{ "name": "SF_DISARM_TILT", "type": "Float", "group": "Safety", "units": "radians", "shortDesc": "Tilt angle above which auto-disarm triggers" }
+	]
+}