Resources and Assets

To give customers more flexibility in how they speak, you can provide multiple friendly names for some capabilities or their configurations. You provide these friendly names through Resources objects. Customers can use any of the provided friendly names when speaking to Alexa. The first entry in the list is considered primary and is displayed in the Alexa app.

Resources objects

The following table describes the fields in capabilityResources, ModeResources, and presetResources objects.

Field Description Type
friendlyNames Required. An array of Label objects that customers can use for VUI and GUI interactions. The first label in the list is the primary name and is used for display in the GUI. The primary name must be unique for the endpoint. All the labels in the list are synonyms and are valid for targeting a device with VUI interactions. array of Label objects

Label object

Resources are made up of label objects. You can use labels from the global Alexa catalog, or you can upload your own catalog of labels.

The following tables describe the fields in a label object in more detail.

Label object

Field Type Description
@type string Required. The type of the object. Supported values are asset and text.
value object Required. The value of the label.

When @type is asset, contains an AssetString that references an item from a localized catalog of strings.

When @type is text, contains a TextString to represent a literal string value.

AssetString object

Field Type Description
assetId string Required. The ID of the localized string in the global or skill catalog.

TextString object

Field Type Description
text string Required. The literal representation of a string.
locale string Required. The locale in which the string is localized. Currently, the only supported value is en-US.

Assets use a namespace to identify the source catalog for their values. The Alexa namespace indicates the global catalog curated by Amazon. Other namespaces indicate vendor catalogs, and can be prefaced with the name of the catalog associated with the device, or with the My prefix to indicate a vendor catalog.


Use capabilityResources to provide a set of friendlyNames for the ToggleController, RangeController, and ModeController interfaces.

Example capabilityResources

The following example shows one way to model a fan with a "rotate" feature. The skill uses an Alexa.ToggleController and provides friendlyNames of "Rotate" and "Rotation" as plain text. This allows customers to say phrases like "Turn on rotate on the fan" or "Enable fan rotation". The skill also uses an asset of Alexa.Setting.Oscillate as an alternate, so customers can use words like oscillate, oscillation, swivel, and others defined in the Alexa.Setting.Oscillate catalog.

In the following example the first friendly name ("Rotate") is the one displayed in the Alexa mobile app. The friendly name listed first is the one displayed in the app.

  "type": "AlexaInterface",
  "interface": "Alexa.ToggleController",
  "version": "3",
  "instance": "SampleFan.Rotate",
  "capabilityResources": {
    "friendlyNames": [
        "@type": "asset",
        "value": {
          "assetId": "Alexa.Setting.Oscillate"
        "@type": "text",
        "value": {
          "text": "Rotate",
          "locale": "en-US"
        "@type": "text",
        "value": {
          "text": "Rotation",
          "locale": "en-US"


Use presetResources with RangeController to provide a set of friendlyNames for each RangeController preset.

Example presetResources

The following example shows one way to model a fan that has a speed feature. The skill models this feature with an Alexa.RangeController and provides presets for various range values. This allows customers to set the fan speed to a numeric value without using a number in their utterance. For example, the skill provides a preset for 1 with friendlyNames of Alexa.Value.Low as an asset, and "Slowest" as plain text. This allows customers to say phrases like "Set the fan speed to low" or "Set the fan speed to slowest".

In the following example the first friendly name ("Low", which is the first friendly name for the Alexa.Value.Low identifier) is the one displayed in the Alexa mobile app. The friendly name listed first is the one displayed in the app.

  "presets": [
      "rangeValue": 1,
      "presetResources": {
        "friendlyNames": [
            "@type": "asset",
            "value": {
              "assetId": "Alexa.Value.Low"
            "@type": "text",
            "value": {
              "text": "Slowest",
              "locale": "en-US"

Global Alexa catalog

You can use the global Alexa catalog for pre-defined names of devices, settings, values, and units. This catalog is localized into all the languages that Alexa supports.

You can reference the following catalog of pre-defined friendly names. Each item in the following list is an asset identifier followed by its supported friendly names. The first friendly name for each identifier (in bold) is the one displayed in the Alexa mobile app.

Asset Identifier Supported Friendly Names
Alexa.DeviceName.AirPurifier Air Purifier, Air Cleaner, Clean Air Machine
Alexa.DeviceName.Fan Fan, Blower
Alexa.DeviceName.Router Router, Internet Router, Network Router, Wifi Router, Net Router
Alexa.DeviceName.Shade Shade, Blind, Curtain, Roller, Shutter, Drape, Awning, Window shade, Interior blind
Alexa.DeviceName.Shower Shower
Alexa.DeviceName.SpaceHeater Space Heater, Portable Heater
Alexa.DeviceName.Washer Washer, Washing Machine
Alexa.Setting.2GGuestWiFi 2.4G Guest Wi-Fi, 2.4G Guest Network, Guest Network 2.4G, 2G Guest Wifi
Alexa.Setting.5GGuestWiFi 5G Guest Wi-Fi, 5G Guest Network, Guest Network 5G, 5G Guest Wifi
Alexa.Setting.Auto Auto, Automatic, Automatic Mode, Auto Mode
Alexa.Setting.Direction Direction
Alexa.Setting.DryCycle Dry Cycle, Dry Preset, Dry Setting, Dryer Cycle, Dryer Preset, Dryer Setting
Alexa.Setting.FanSpeed Fan Speed, Airflow speed, Wind Speed, Air speed, Air velocity
Alexa.Setting.GuestWiFi Guest Wi-fi, Guest Network, Guest Net
Alexa.Setting.Heat Heat
Alexa.Setting.Mode Mode
Alexa.Setting.Night Night, Night Mode
Alexa.Setting.Opening Opening, Height, Lift, Width
Alexa.Setting.Oscillate Oscillate, Swivel, Oscillation, Spin, Back and forth
Alexa.Setting.Preset Preset, Setting
Alexa.Setting.Quiet Quiet, Quiet Mode, Noiseless, Silent
Alexa.Setting.Temperature Temperature, Temp
Alexa.Setting.WashCycle Wash Cycle, Wash Preset, Wash setting
Alexa.Setting.WaterTemperature Water Temperature, Water Temp, Water Heat
Alexa.Shower.HandHeld Handheld Shower, Shower Wand, Hand Shower
Alexa.Shower.RainHead Rain Head, Overhead shower, Rain Shower, Rain Spout, Rain Faucet
Alexa.Unit.Angle.Degrees Degrees, Degree
Alexa.Unit.Angle.Radians Radians, Radian
Alexa.Unit.Distance.Feet Feet, Foot
Alexa.Unit.Distance.Inches Inches, Inch
Alexa.Unit.Distance.Kilometers Kilometers
Alexa.Unit.Distance.Meters Meters, Meter, m
Alexa.Unit.Distance.Miles Miles, Mile
Alexa.Unit.Distance.Yards Yards, Yard
Alexa.Unit.Mass.Grams Grams, Gram, g
Alexa.Unit.Mass.Kilograms Kilograms, Kilogram, kg
Alexa.Unit.Percent Percent
Alexa.Unit.Temperature.Celsius Celsius, Degrees Celsius, Degrees, C, Centigrade, Degrees Centigrade
Alexa.Unit.Temperature.Degrees Degrees, Degree
Alexa.Unit.Temperature.Fahrenheit Fahrenheit, Degrees Fahrenheit, Degrees F, Degrees, F
Alexa.Unit.Temperature.Kelvin Kelvin, Degrees Kelvin, Degrees K, Degrees, K
Alexa.Unit.Volume.CubicFeet Cubic Feet, Cubic Foot
Alexa.Unit.Volume.CubicMeters Cubic Meters, Cubic Meter, Meters Cubed
Alexa.Unit.Volume.Gallons Gallons, Gallon
Alexa.Unit.Volume.Liters Liters, Liter, L
Alexa.Unit.Volume.Pints Pints, Pint
Alexa.Unit.Volume.Quarts Quarts, Quart
Alexa.Unit.Weight.Ounces Ounces, Ounce, oz
Alexa.Unit.Weight.Pounds Pounds, Pound, lbs
Alexa.Value.Close Close
Alexa.Value.Delicate Delicates, Delicate
Alexa.Value.High High
Alexa.Value.Low Low
Alexa.Value.Maximum Maximum, Max
Alexa.Value.Medium Medium, Mid
Alexa.Value.Minimum Minimum, Min
Alexa.Value.Open Open
Alexa.Value.QuickWash Quick Wash, Fast Wash, Wash Quickly, Speed Wash

Upload your own catalog

You can also upload your own catalog with your own custom terms.

We recommend that you use catalogs for any names that require localization. For user-defined names and settings, we recommend that you use plain text strings and notify Alexa of any changes via an AddOrUpdateReport.

Names you cannot use

You cannot use any words from the following list as friendly names:

alarm, alarms, all alarms, away mode, bass, camera, date, date today, day, do not disturb, drop in, music, night light, notification, playing, sleep sounds, time, timer, today in music, treble, volume, way f. m.