Quickstart: Build your app in LUIS portal


LUIS will be retired on October 1st 2025 and starting April 1st 2023 you will not be able to create new LUIS resources. We recommend migrating your LUIS applications to conversational language understanding to benefit from continued product support and multilingual capabilities.

In this quickstart, create a LUIS app using the prebuilt home automation domain for turning lights and appliances on and off. This prebuilt domain provides intents, entities, and example utterances for you. Next, try customizing your app by adding more intents and entities. When you're finished, you'll have a LUIS endpoint running in the cloud.

Sign in to LUIS portal

A new user to LUIS needs to follow this procedure:

  1. Sign in to the LUIS portal, select your country/region and agree to the terms of use. If you see My Apps instead, a LUIS resource already exists and you should skip ahead to create an app. If not, start by using an Azure resource, this allows you to link your LUIS account with a new or existing Azure Authoring resource.
  1. In the Choose an authoring window that appears, find your Azure subscription, and LUIS authoring resource. If you don't have a resource, you can create a new one.

    Choose a type of Language Understanding authoring resource.

    When you create a new authoring resource, provide the following information:

    • Tenant name - the tenant your Azure subscription is associated with.
    • Azure subscription name - the subscription that will be billed for the resource.
    • Azure resource group name - a custom resource group name you choose or create. Resource groups allow you to group Azure resources for access and management.
    • Azure resource name - a custom name you choose, used as part of the URL for your authoring and prediction endpoint queries.
    • Pricing tier - the pricing tier determines the maximum transaction per second and month.

Select subscription and authoring resource

When you select a specific subscription and authoring resource, you will see a list of apps associated with it.

Select authoring subscription and authoring resource

Create a new app

You can create and manage your applications on My Apps.

Create an application

To create an application, click + New app.

In the window that appears, enter the following information:

Name Description
Name A name for your app. For example, "home automation".
Culture The language that your app understands and speaks.
Description A description for your app.
Prediction resource The prediction resource that will receive queries.

Select Done.


The culture cannot be changed once the application is created.

Add prebuilt domain

LUIS offers a set of prebuilt domains that can help you get started with your application. A prebuilt domain app is already populated with intents, entities and utterances.

  1. In the left navigation, select Prebuilt domains.

  2. Search for HomeAutomation.

  3. Select Add domain on the HomeAutomation card.

    Select 'Prebuilt domains' then search for 'HomeAutomation'. Select 'Add domain' on the HomeAutomation card.

    When the domain is successfully added, the prebuilt domain box displays a Remove domain button.

Check out intents and entities

  1. Select Intents in the left navigation menu to see the HomeAutomation domain intents. It has example utterances, such as HomeAutomation.QueryState and HomeAutomation.SetDevice.


    None is an intent provided by all LUIS apps. You use it to handle utterances that don't correspond to functionality your app provides.

  2. Select the HomeAutomation.TurnOff intent. The intent contains a list of example utterances that are labeled with entities.

    Screenshot of HomeAutomation.TurnOff intent

  3. If you want to view the entities for the app, select Entities. If you select one of the entities, such as HomeAutomation.DeviceName you will see a list of values associated with it.

    Image alt text

Train the LUIS app

After your application is populated with intents, entities, and utterances, you need to train the application so that the changes you made can be reflected.

  1. In the top-right side of the LUIS website, select the Train button.

    Train button

  2. Training is complete when the Train button is disabled.

Test your app

Once you've trained your app, you can test it.

  1. Select Test from the top-right navigation.

  2. Type a test utterance into the interactive test pane, and press Enter. For example, Turn off the lights.

    In this example, Turn off the lights is correctly identified as the top scoring intent of HomeAutomation.TurnOff.

    Screenshot of test panel with utterance highlighted

  3. Select Inspect to view more information about the prediction.

    Screenshot of test panel with inspection information

  4. Close the test pane.

Customize your application

Besides the prebuilt domains LUIS allows you to create your own custom applications or to customize on top of prebuilt ones.

Create Intents

To add more intents to your app

  1. Select Intents in the left navigation menu.
  2. Select Create
  3. Enter the intent name, HomeAutomation.AddDeviceAlias, and then select Done.

Create Entities

To add more entities to your app

  1. Select Entities in the left navigation menu.
  2. Select Create
  3. Enter the entity name, HomeAutomation.DeviceAlias, select machine learned from type and then select Create.

Add example utterances

Example utterances are text that a user enters in a chat bot or other client applications. They map the intention of the user's text to a LUIS intent.

On the Intents page for HomeAutomation.AddDeviceAlias, add the following example utterances under Example Utterance,

# Example utterances
1 Add alias to my fan to be wind machine
2 Alias lights to illumination
3 nickname living room speakers to our speakers a new fan
4 rename living room tv to main tv

For best results make sure that example utterances vary in the following ways:

  • Utterance length
  • punctuation
  • Word choice
  • Verb tense (is, was, will be)
  • Word order

Label example utterances

Labeling your utterances is needed because you added an ML entity. Labeling is used by your application to learn how to extract the ML entities you created.

To label your utterances, you have two options: Entity palette labeling and inline labeling.

Entity palette labeling

When you select the @ icon on top right, the entity palette opens in the right side of the page.

  1. Select the entity you want to start labeling.

    labelling an entity using the entity palette

  2. Highlight the text you want to label with this entity.

    label an entity using the entity palette

Inline labeling

  1. Highlight the text you want to label.

  2. Select the entity you want to label the text with from the menu that pops up.

    menu for label the text

Create Prediction resource

At this point, you have completed authoring your application. You need to create a prediction resource to publish your application in order to receive predictions in a chat bot or other client applications through the prediction endpoint

To create a Prediction resource from the LUIS portal

  1. Go to the Manage tab in your application.

  2. In the left navigation, select Azure Resources.

  3. select Add Prediction resource button.

    Add Prediction resource from portal

    If you already have a prediction resource, add it. Otherwise, select Create a new prediction resource.

    Add Prediction resource from portal-2

Publish the app to get the endpoint URL

In order to receive a LUIS prediction in a chat bot or other client applications, you need to publish the app to the prediction endpoint.

  1. Select Publish in the top-right navigation.

    A screenshot of the button for publishing to the endpoint.

  2. Select the Production slot, then select Done.

    A screenshot of LUIS publishing to the endpoint.

  3. Select Access your endpoint URLs in the notification to go to the Azure Resources page. You will only be able to see the URLs if you have a prediction resource associated with the app. You can also find the Azure Resources page by clicking Manage.

    A screenshot of a message showing the app has been published.

Query the V3 API prediction endpoint

  1. In the LUIS portal, in the Manage section (top-right menu), on the Azure Resources page (left menu), on the Prediction Resources tab, copy the Example Query at the bottom of the page. The URL has your app ID, key, and slot name. The V3 prediction endpoint URL has the form of: https://YOUR-RESOURCE-NAME.api.cognitive.microsoft.com/luis/prediction/v3.0/apps/APP-ID/slots/SLOT-NAME/predict?subscription-key=YOUR-PREDICTION-KEY&<optional-name-value-pairs>&query=YOUR_QUERY_HERE

    example query in the prediction resources section

    Paste the URL into a new browser tab. If you don't see the URL, you don't have a prediction resource and will need to create one.

  1. In the browser address bar, for the query string, make sure the following values are in the URL. If they are not in the query string, add them:

    • verbose=true
    • show-all-intents=true
  2. In the browser address bar, go to the end of the URL and enter turn off the living room light for the query string, then press Enter.

        "query": "turn off the living room light",
        "prediction": {
            "topIntent": "HomeAutomation.TurnOff",
            "intents": {
                "HomeAutomation.TurnOff": {
                    "score": 0.969448864
                "HomeAutomation.QueryState": {
                    "score": 0.0122336326
                "HomeAutomation.TurnUp": {
                    "score": 0.006547436
                "HomeAutomation.TurnDown": {
                    "score": 0.0050634006
                "HomeAutomation.SetDevice": {
                    "score": 0.004951761
                "HomeAutomation.TurnOn": {
                    "score": 0.00312553928
                "None": {
                    "score": 0.000552945654
            "entities": {
                "HomeAutomation.Location": [
                    "living room"
                "HomeAutomation.DeviceName": [
                        "living room light"
                "HomeAutomation.DeviceType": [
                "$instance": {
                    "HomeAutomation.Location": [
                            "type": "HomeAutomation.Location",
                            "text": "living room",
                            "startIndex": 13,
                            "length": 11,
                            "score": 0.902181149,
                            "modelTypeId": 1,
                            "modelType": "Entity Extractor",
                            "recognitionSources": [
                    "HomeAutomation.DeviceName": [
                            "type": "HomeAutomation.DeviceName",
                            "text": "living room light",
                            "startIndex": 13,
                            "length": 17,
                            "modelTypeId": 5,
                            "modelType": "List Entity Extractor",
                            "recognitionSources": [
                    "HomeAutomation.DeviceType": [
                            "type": "HomeAutomation.DeviceType",
                            "text": "light",
                            "startIndex": 25,
                            "length": 5,
                            "modelTypeId": 5,
                            "modelType": "List Entity Extractor",
                            "recognitionSources": [

Clean up resources

When no longer needed, delete the LUIS app. To do so, select My apps from the top left menu. Select the ellipsis (...) to the right of the app name in the app list, select Delete. On the pop-up dialog Delete app?, select Ok.

Next steps