Firebase Functions SDK

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01 May 2017 - 28 Feb 2026

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The Wayback Machine - https://web.archive.org/web/20210613175857/https://firebase.google.com/docs/reference/functions/

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Analytics
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Predictions
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Dynamic Links
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App Indexing

Reference Samples Libraries

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API Reference
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iOS — Swift
iOS — Objective-C
Android — Java
- Package Summary
- ads
- ads
  - Overview
  - AdError
  - AdFormat
  - AdInspectorError
    Overview
    AdInspectorErrorCode
  - AdListener
  - AdLoadCallback
  - AdLoader
    Overview
    Builder
  - AdRequest
    Overview
    Builder
  - AdSize
  - AdValue
    Overview
    PrecisionType
  - AdView
  - AdapterResponseInfo
  - BaseAdView
  - FullScreenContentCallback
  - LoadAdError
  - MediaAspectRatio
  - MediaContent
  - MediationUtils
  - MobileAds
  - MuteThisAdListener
  - MuteThisAdReason
  - OnAdInspectorClosedListener
  - OnPaidEventListener
  - OnUserEarnedRewardListener
  - RequestConfiguration
    Overview
    Builder
    MaxAdContentRating
    TagForChildDirectedTreatment
    TagForUnderAgeOfConsent
  - ResponseInfo
  - VideoController
    Overview
    VideoLifecycleCallbacks
  - VideoOptions
    Overview
    Builder
- ads.admanager
  - Overview
  - AdManagerAdRequest
    Overview
    Builder
  - AdManagerAdView
  - AdManagerInterstitialAd
  - AdManagerInterstitialAdLoadCallback
  - AppEventListener
- ads.appopen
  - Overview
  - AppOpenAd
    Overview
    AppOpenAdLoadCallback
    AppOpenAdOrientation
- ads.formats
  - Overview
  - AdManagerAdViewOptions
    Overview
    Builder
  - MediaView
  - NativeAd
    Overview
    AdChoicesInfo
    Image
  - NativeAdOptions
    Overview
    AdChoicesPlacement
    Builder
    NativeMediaAspectRatio
  - OnAdManagerAdViewLoadedListener
  - UnifiedNativeAdAssetNames
- ads.h5
- ads.initialization
  - Overview
  - AdapterStatus
    Overview
    State
  - InitializationStatus
  - OnInitializationCompleteListener
- ads.interstitial
- ads.mediation
- ads.mediation.admob
  - Overview
  - AdMobExtras
- ads.mediation.customevent
- ads.mediation.rtb
- ads.nativead
  - Overview
  - AdChoicesView
  - MediaView
  - NativeAd
    Overview
    AdChoicesInfo
    Image
    OnNativeAdLoadedListener
    UnconfirmedClickListener
  - NativeAdAssetNames
  - NativeAdOptions
    Overview
    AdChoicesPlacement
    Builder
    NativeMediaAspectRatio
  - NativeAdView
  - NativeAdViewHolder
  - NativeCustomFormatAd
    Overview
    DisplayOpenMeasurement
    OnCustomClickListener
    OnCustomFormatAdLoadedListener
- ads.rewarded
  - Overview
  - OnAdMetadataChangedListener
  - RewardItem
  - RewardedAd
  - RewardedAdLoadCallback
  - ServerSideVerificationOptions
    Overview
    Builder
- ads.rewardedinterstitial
- ads.search
  - Overview
  - DynamicHeightSearchAdRequest
    Overview
    Builder
  - SearchAdView
- appindexing
- appindexing
  - Overview
  - Action
    Overview
    Builder
  - AndroidAppUri
  - AppIndex
  - AppIndexApi
    Overview
    ActionResult
    AppIndexingLink
  - Thing
    Overview
    Builder
- firebase.appindexing
  - Overview
  - Action
    Overview
    Builder
    
    Action.Metadata
    Overview
    Builder
  - AndroidAppUri
  - FirebaseAppIndex
  - FirebaseAppIndexingException
  - FirebaseAppIndexingInvalidArgumentException
  - FirebaseAppIndexingTooManyArgumentsException
  - FirebaseUserActions
  - Indexable
    Overview
    Builder
    
    Indexable.Metadata
    Overview
    Builder
  - Scope
- firebase.appindexing.builders
- measurement
- measurement
- measurement.api
- firebase.analytics
  - Overview
  - FirebaseAnalytics
    Overview
    ConsentStatus
    ConsentType
    Event
    Param
    UserProperty
- measurement.impl
- measurement
  - Overview
  - AppMeasurementContentProvider
- firebase
- firebase
- firebase.auth
- firebase.provider
  - Overview
  - FirebaseInitProvider
- firebase.appcheck
- firebase.appcheck
- firebase.appcheck-debug
- firebase.appcheck.debug
  - Overview
  - DebugAppCheckProviderFactory
- firebase.appcheck-debug-testing
- firebase.appcheck.debug.testing
  - Overview
  - DebugAppCheckTestHelper
    Overview
    MaybeThrowingRunnable
- firebase.appcheck-safetynet
- firebase.appcheck.safetynet
  - Overview
  - SafetyNetAppCheckProviderFactory
- firebase.auth
- firebase.auth
- firebase.auth.api.model.json
  - Overview
  - JsonHelper
- firebase.crashlytics
- firebase.crashlytics
  - Overview
  - CustomKeysAndValues
    Overview
    Builder
  - FirebaseCrashlytics
- firebase.database
- firebase.database
  - Overview
  - ChildEventListener
  - DataSnapshot
  - DatabaseError
  - DatabaseException
  - DatabaseReference
    Overview
    CompletionListener
  - Exclude
  - FirebaseDatabase
  - GenericTypeIndicator
  - IgnoreExtraProperties
  - Logger
    Overview
    Level
  - MutableData
  - OnDisconnect
  - PropertyName
  - Query
  - ServerValue
  - ThrowOnExtraProperties
  - Transaction
    Overview
    Handler
    Result
  - ValueEventListener
- firebase.dynamiclinks
- firebase.dynamiclinks
  - Overview
  - DynamicLink
    Overview
    
    DynamicLink.AndroidParameters
    Overview
    Builder
    Builder
    
    DynamicLink.GoogleAnalyticsParameters
    Overview
    Builder
    
    DynamicLink.IosParameters
    Overview
    Builder
    
    DynamicLink.ItunesConnectAnalyticsParameters
    Overview
    Builder
    
    DynamicLink.NavigationInfoParameters
    Overview
    Builder
    
    DynamicLink.SocialMetaTagParameters
    Overview
    Builder
  - FirebaseDynamicLinks
  - PendingDynamicLinkData
  - ShortDynamicLink
    Overview
    Suffix
    Warning
- firebase.firestore
- firebase.firestore
  - Overview
  - Blob
  - CollectionReference
  - DocumentChange
    Overview
    Type
  - DocumentId
  - DocumentReference
  - DocumentSnapshot
    Overview
    ServerTimestampBehavior
  - EventListener
  - Exclude
  - FieldPath
  - FieldValue
  - FirebaseFirestore
  - FirebaseFirestoreException
    Overview
    Code
  - FirebaseFirestoreSettings
    Overview
    Builder
  - GeoPoint
  - IgnoreExtraProperties
  - ListenerRegistration
  - LoadBundleTask
  - LoadBundleTaskProgress
    Overview
    TaskState
  - MetadataChanges
  - OnProgressListener
  - PropertyName
  - Query
    Overview
    Direction
  - QueryDocumentSnapshot
  - QuerySnapshot
  - ServerTimestamp
  - SetOptions
  - SnapshotMetadata
  - Source
  - ThrowOnExtraProperties
  - Transaction
    Overview
    Function
  - WriteBatch
    Overview
    Function
- firebase.functions
- firebase.functions
  - Overview
  - FirebaseFunctions
  - FirebaseFunctionsException
    Overview
    Code
  - HttpsCallableReference
  - HttpsCallableResult
- firebase.inappmessaging
- firebase.inappmessaging
- firebase.inappmessaging.model
- firebase.inappmessaging.display
- firebase.inappmessaging.display
  - Overview
  - FirebaseInAppMessagingDisplay
- firebase.iid
- firebase.iid
- firebase.installations
- firebase.installations
  - Overview
  - FirebaseInstallations
- firebase.messaging
- firebase.messaging
  - Overview
  - FirebaseMessaging
  - FirebaseMessagingService
  - RemoteMessage
    Overview
    Builder
    MessagePriority
    Notification
  - SendException
- firebase.ml.common
- firebase.ml.common
  - Overview
  - FirebaseMLException
    Overview
    Code
- firebase.ml.common.modeldownload
  - Overview
  - FirebaseLocalModel
    Overview
    Builder
  - FirebaseModelDownloadConditions
    Overview
    Builder
  - FirebaseModelManager
  - FirebaseRemoteModel
- firebase.ml.interpreter
- firebase.ml.custom
  - Overview
  - FirebaseCustomLocalModel
    Overview
    Builder
  - FirebaseCustomRemoteModel
    Overview
    Builder
  - FirebaseModelDataType
    Overview
    DataType
  - FirebaseModelInputOutputOptions
    Overview
    Builder
  - FirebaseModelInputs
    Overview
    Builder
  - FirebaseModelInterpreter
  - FirebaseModelInterpreterOptions
    Overview
    Builder
  - FirebaseModelOutputs
- firebase.ml.modeldownloader
- firebase.ml.modeldownloader
  - Overview
  - CustomModel
  - CustomModelDownloadConditions
    Overview
    Builder
  - DownloadType
  - FirebaseMlException
    Overview
    Code
  - FirebaseModelDownloader
- firebase.ml.naturallanguage
- firebase.ml.naturallanguage
  - Overview
  - FirebaseNaturalLanguage
- firebase.ml.naturallanguage.languageid
  - Overview
  - FirebaseLanguageIdentification
  - FirebaseLanguageIdentificationOptions
    Overview
    Builder
  - IdentifiedLanguage
- firebase.ml.naturallanguage.smartreply
  - Overview
  - FirebaseSmartReply
  - FirebaseTextMessage
  - SmartReplySuggestion
  - SmartReplySuggestionResult
    Overview
    Status
- firebase.ml.naturallanguage.translate
- firebase.ml.naturallanguage.translate
  - Overview
  - FirebaseTranslateLanguage
    Overview
    TranslateLanguage
  - FirebaseTranslateRemoteModel
    Overview
    Builder
  - FirebaseTranslator
  - FirebaseTranslatorOptions
    Overview
    Builder
- firebase.ml.vision
- firebase.ml.vision
  - Overview
  - FirebaseVision
- firebase.ml.vision.automl
  - Overview
  - FirebaseAutoMLLocalModel
    Overview
    Builder
  - FirebaseAutoMLRemoteModel
    Overview
    Builder
- firebase.ml.vision.barcode
  - Overview
  - FirebaseVisionBarcode
    Overview
    
    FirebaseVisionBarcode.Address
    Overview
    AddressType
    BarcodeFormat
    BarcodeValueType
    CalendarDateTime
    CalendarEvent
    ContactInfo
    DriverLicense
    
    FirebaseVisionBarcode.Email
    Overview
    FormatType
    GeoPoint
    PersonName
    
    FirebaseVisionBarcode.Phone
    Overview
    FormatType
    Sms
    UrlBookmark
    
    FirebaseVisionBarcode.WiFi
    Overview
    EncryptionType
  - FirebaseVisionBarcodeDetector
  - FirebaseVisionBarcodeDetectorOptions
    Overview
    Builder
- firebase.ml.vision.cloud
  - Overview
  - FirebaseVisionCloudDetectorOptions
    Overview
    Builder
    ModelType
- firebase.ml.vision.cloud.landmark
- firebase.ml.vision.common
  - Overview
  - FirebaseVisionImage
  - FirebaseVisionImageMetadata
    Overview
    Builder
    ImageFormat
    Rotation
  - FirebaseVisionLatLng
  - FirebaseVisionPoint
- firebase.ml.vision.document
  - Overview
  - FirebaseVisionCloudDocumentRecognizerOptions
    Overview
    Builder
  - FirebaseVisionDocumentText
    Overview
    Block
    Paragraph
    
    FirebaseVisionDocumentText.RecognizedBreak
    Overview
    BreakType
    Symbol
    Word
  - FirebaseVisionDocumentTextRecognizer
- firebase.ml.vision.face
  - Overview
  - FirebaseVisionFace
  - FirebaseVisionFaceContour
    Overview
    ContourType
  - FirebaseVisionFaceDetector
  - FirebaseVisionFaceDetectorOptions
    Overview
    Builder
    ClassificationMode
    ContourMode
    LandmarkMode
    PerformanceMode
  - FirebaseVisionFaceLandmark
    Overview
    LandmarkType
- firebase.ml.vision.label
  - Overview
  - FirebaseVisionCloudImageLabelerOptions
    Overview
    Builder
  - FirebaseVisionImageLabel
  - FirebaseVisionImageLabeler
    Overview
    ImageLabelerType
  - FirebaseVisionOnDeviceAutoMLImageLabelerOptions
    Overview
    Builder
  - FirebaseVisionOnDeviceImageLabelerOptions
    Overview
    Builder
- firebase.ml.vision.objects
  - Overview
  - FirebaseVisionObject
    Overview
    Category
  - FirebaseVisionObjectDetector
  - FirebaseVisionObjectDetectorOptions
    Overview
    Builder
    DetectorMode
- firebase.ml.vision.text
  - Overview
  - FirebaseVisionCloudTextRecognizerOptions
    Overview
    Builder
    CloudTextModelType
  - FirebaseVisionText
    Overview
    Element
    Line
    TextBlock
  - FirebaseVisionTextRecognizer
    Overview
    RecognizerType
  - RecognizedLanguage
- firebase.perf
- firebase.perf
  - Overview
  - FirebasePerformance
    Overview
    HttpMethod
- firebase.perf.metrics
- firebase.remoteconfig
- firebase.remoteconfig
- firebase.storage
- firebase.storage
  - Overview
  - CancellableTask
  - ControllableTask
  - FileDownloadTask
    Overview
    TaskSnapshot
  - FirebaseStorage
  - ListResult
  - OnPausedListener
  - OnProgressListener
  - StorageException
    Overview
    ErrorCode
  - StorageMetadata
    Overview
    Builder
  - StorageReference
  - StorageTask
    Overview
    ProvideError
    SnapshotBase
  - StreamDownloadTask
    Overview
    StreamProcessor
    TaskSnapshot
  - UploadTask
    Overview
    TaskSnapshot
- Inter-operational packages
- firebase.auth.internal
Android — Kotlin
- Package Summary
- firebase
- com.google.firebase
  - Overview
  - Classes
    FirebaseApp
    FirebaseOptions
    FirebaseOptions.Builder
  - Exceptions
    FirebaseNetworkException
    FirebaseTooManyRequestsException
- com.google.firebase.provider
  - Overview
  - Classes
    FirebaseInitProvider
- com.google.firebase.ktx
  - Overview
  - Objects
    Firebase
- firebase.analytics
- com.google.firebase.analytics
- com.google.firebase.analytics.ktx
  - Overview
  - Classes
    ParametersBuilder
- firebase.auth
- com.google.firebase.auth
- com.google.firebase.auth.ktx
- firebase.crashlytics
- com.google.firebase.crashlytics
  - Overview
  - Classes
    CustomKeysAndValues
    CustomKeysAndValues.Builder
    FirebaseCrashlytics
- com.google.firebase.crashlytics.ktx
  - Overview
  - Classes
    KeyValueBuilder
- firebase.database
- com.google.firebase.database
  - Overview
  - Classes
    DatabaseError
    DatabaseReference
    DataSnapshot
    FirebaseDatabase
    GenericTypeIndicator
    MutableData
    OnDisconnect
    Query
    ServerValue
    Transaction
    Transaction.Result
  - Interfaces
    ChildEventListener
    DatabaseReference.CompletionListener
    Logger
    Transaction.Handler
    ValueEventListener
  - Enums
    Logger.Level
  - Annotations
    Exclude
    IgnoreExtraProperties
    PropertyName
    ThrowOnExtraProperties
  - Exceptions
    DatabaseException
- com.google.firebase.database.ktx
- firebase.dynamiclinks
- com.google.firebase.dynamiclinks
- com.google.firebase.dynamiclinks.ktx
- firebase.firestore
- com.google.firebase
  - Overview
  - Classes
    Timestamp
- com.google.firebase.firestore
- com.google.firebase.firestore.ktx
- firebase.functions
- com.google.firebase.functions
  - Overview
  - Classes
    FirebaseFunctions
    HttpsCallableReference
    HttpsCallableResult
  - Enums
    FirebaseFunctionsException.Code
  - Exceptions
    FirebaseFunctionsException
- com.google.firebase.functions.ktx
- firebase.inappmessaging
- com.google.firebase.inappmessaging
- com.google.firebase.inappmessaging.model
  - Overview
  - Classes
    Action
    BannerMessage
    Button
    CampaignMetadata
    CardMessage
    ImageData
    ImageOnlyMessage
    InAppMessage
    ModalMessage
    Text
  - Enums
    MessageType
- com.google.firebase.inappmessaging.ktx
- firebase.inappmessaging.display
- com.google.firebase.inappmessaging.display
  - Overview
  - Classes
    FirebaseInAppMessagingDisplay
- com.google.firebase.inappmessaging.display.ktx
- firebase.installations
- com.google.firebase.installations
  - Overview
  - Classes
    FirebaseInstallations
- com.google.firebase.installations.ktx
- firebase.messaging
- com.google.firebase.messaging.ktx
- com.google.firebase.messaging
  - Overview
  - Classes
    FirebaseMessaging
    FirebaseMessagingService
    RemoteMessage
    RemoteMessage.Builder
    RemoteMessage.Notification
  - Annotations
    RemoteMessage.MessagePriority
  - Exceptions
    SendException
- firebase.ml.modeldownloader
- com.google.firebase.ml.modeldownloader.ktx
- com.google.firebase.ml.modeldownloader
  - Overview
  - Classes
    CustomModel
    CustomModelDownloadConditions
    CustomModelDownloadConditions.Builder
    FirebaseModelDownloader
  - Enums
    DownloadType
  - Annotations
    FirebaseMlException.Code
  - Exceptions
    FirebaseMlException
- firebase.perf
- com.google.firebase.perf
  - Overview
  - Classes
    FirebasePerformance
  - Annotations
    FirebasePerformance.HttpMethod
- com.google.firebase.perf.metrics
  - Overview
  - Classes
    HttpMetric
    Trace
  - Annotations
    AddTrace
- com.google.firebase.perf.ktx
- firebase.remoteconfig
- com.google.firebase.remoteconfig
- com.google.firebase.remoteconfig.ktx
- firebase.storage
- com.google.firebase.storage
- com.google.firebase.storage.ktx
JavaScript - version 8
- Overview
- firebase
  - Overview
  - FirebaseError
- firebase.app
  - Overview
  - App
- firebase.analytics
- firebase.auth
- firebase.database
- firebase.firestore
- firebase.functions
- firebase.installations
  - Overview
  - Installations
- firebase.messaging
- firebase.performance
- firebase.remoteconfig
- firebase.storage
JavaScript — version 9
Node.js (Client)
C++
- Overview
- firebase
  - Overview
  - Classes
    App
    AppOptions
    Future
    FutureBase
    FutureHandle
    ModuleInitializer
    Timestamp
    Variant
- firebase::admob
- firebase::admob::rewarded_video
  - Overview
  - Classes
    Listener
    PollableRewardListener
  - Structs
    RewardItem
- firebase::analytics
  - Overview
  - Structs
    Parameter
- firebase::auth
- firebase::database
  - Overview
  - Classes
    ChildListener
    Database
    DatabaseReference
    DataSnapshot
    DisconnectionHandler
    MutableData
    Query
    ValueListener
- firebase::dynamic_links
- firebase::firestore
  - Overview
  - Classes
    CollectionReference
    DocumentChange
    DocumentReference
    DocumentSnapshot
    EventListener< void >
    FieldPath
    FieldValue
    Firestore
    GeoPoint
    ListenerRegistration
    Query
    QuerySnapshot
    SetOptions
    Settings
    SnapshotMetadata
    Transaction
    TransactionFunction
    WriteBatch
- firebase::functions
  - Overview
  - Classes
    Functions
    HttpsCallableReference
    HttpsCallableResult
- firebase::installations
  - Overview
  - Classes
    Installations
- firebase::instance_id
  - Overview
  - Classes
    InstanceId
- firebase::messaging
  - Overview
  - Classes
    Listener
    PollableListener
  - Structs
    AndroidNotificationParams
    Message
    MessagingOptions
    Notification
- firebase::remote_config
  - Overview
  - Classes
    RemoteConfig
  - Structs
    ConfigInfo
    ConfigKeyValue
    ConfigKeyValueVariant
    ConfigSettings
    ValueInfo
- firebase::storage
  - Overview
  - Classes
    Controller
    Listener
    Metadata
    Storage
    StorageReference
- std
  - Overview
  - Structs
    FieldPath >
- Modules
- Namespaces
  - google_play_services
- Related Pages
  - Deprecated List
Unity
- Overview
- Firebase
  - Overview
  - Classes
    AppOptions
    FirebaseApp
    FirebaseApp.EnableModuleParams
    FirebaseException
    InitializationException
- Firebase.Analytics
  - Overview
  - Classes
    FirebaseAnalytics
    Parameter
- Firebase.Auth
- Firebase.Crashlytics
  - Overview
  - Classes
    Crashlytics
- Firebase.Database
  - Overview
  - Classes
    ChildChangedEventArgs
    DatabaseError
    DatabaseException
    DatabaseReference
    DataSnapshot
    FirebaseDatabase
    MutableData
    OnDisconnect
    Query
    ServerValue
    TransactionResult
    ValueChangedEventArgs
- Firebase.DynamicLinks
  - Overview
  - Classes
    AndroidParameters
    DynamicLinkComponents
    DynamicLinkOptions
    DynamicLinks
    GoogleAnalyticsParameters
    IOSParameters
    ITunesConnectAnalyticsParameters
    ReceivedDynamicLink
    ReceivedDynamicLinkEventArgs
    ShortDynamicLink
    SocialMetaTagParameters
- Firebase.Extensions
  - Overview
  - Classes
    TaskExtension
- Firebase.Firestore
- Firebase.Functions
  - Overview
  - Classes
    FirebaseFunctions
    FunctionsException
    HttpsCallableReference
    HttpsCallableResult
- Firebase.Installations
  - Overview
  - Classes
    FirebaseInstallations
- Firebase.InstanceId
  - Overview
  - Classes
    FirebaseInstanceId
- Firebase.Messaging
  - Overview
  - Classes
    AndroidNotificationParams
    FirebaseMessage
    FirebaseMessaging
    FirebaseNotification
    MessageReceivedEventArgs
    MessagingOptions
    TokenReceivedEventArgs
- Firebase.RemoteConfig
  - Overview
  - Classes
    ConfigInfo
    FirebaseRemoteConfig
    FirebaseRemoteConfigDeprecated
  - Structs
    ConfigSettings
    ConfigValue
- Firebase.Storage
  - Overview
  - Classes
    DownloadState
    FirebaseStorage
    MetadataChange
    StorageException
    StorageMetadata
    StorageProgress< T >
    StorageReference
    UploadState
- System.Threading.Tasks
  - Overview
  - Classes
    Task
    Task< T >
- Namespaces
  - System
  - System.Threading
- Related Pages
  - Deprecated List
Cloud Functions
- Overview
- functions
- functions.config
- functions.function-configuration
- functions.analytics
- functions.auth
- functions.firestore
- functions.database
- functions.https
- functions.logger
  - Overview
  - LogEntry
- functions.pubsub
- functions.remoteconfig
- functions.storage
- functions.testLab
- functions.handler
  - Overview
  - HandlerBuilder
Admin SDK
- Overview
- Error handling
- Node.js