Moments API (now Context API)

Moments API has been renamed to Context API. For full product documentation, see About Context API.

The Context API provides a unique endpoint that can be integrated into your mobile applications for personalized user experiences. This guide covers the steps to implement the Context API using Swift for iOS and Kotlin for Android.

Supported Platforms

Prerequisites

Before you begin, ensure that you have the following:

A Tealium account with access to the Context API.

How it Works

The Context API retrieves visitor data from AudienceStream, which can be used for in-app personalization.

Use Cases

In-App Personalization

Fetch updated visitor information whenever required to power personalized content within your app.

Pass Consented Visitor Data To Other SDKs

Pass specific attributes from the visitor profile to other SDKs present in your app, which can be used to enable personalized messaging, or to run A/B tests for particular user segments.

Initialization

Step 1: Initialize Tealium with Context API Module

import TealiumCore
import TealiumMomentsAPI

let config = TealiumConfig(account: "your_account",
                           profile: "your_profile",
                           environment: "dev",
                           modules: [Collectors.MomentsAPI])

let tealium = Tealium(config: config)

import com.tealium.core.Tealium
import com.tealium.core.TealiumConfig
import com.tealium.core.Environment
import com.tealium.core.modules

val config = TealiumConfig(application, 
                           "your_account",
                           "your_profile",
                           Environment.DEV, 
                           modules = mutableSetOf(Modules.MomentsApi))

val tealium = Tealium.create("your_instance_name", config)

Step 2: Set the Context API Region

Set the momentsAPIRegion property to the region where your AudienceStream profile resides. This must match exactly. If unsure, check with your account manager.

config.momentsAPIRegion = .us_east // Example region

config.momentsApiRegion = MomentsApiRegion.UsEast // Example region

The Custom option is for future use and should not be used without explicit instructions from your Tealium Account Manager.

config.momentsAPIRegion = .custom("custom_region_placeholder")

config.momentsApiRegion = MomentsApiRegion.Custom("custom_region_placeholder")

The following table shows the available regions:

Swift	Kotlin	Underlying value
germany	MomentsApiRegion.Germany	eu-central-1
us_east	MomentsApiRegion.UsEast	us-east-1
sydney	MomentsApiRegion.Sydney	ap-southeast-2
oregon	MomentsApiRegion.Oregon	us-west-2
tokyo	MomentsApiRegion.Tokyo	ap-northeast-1
hong_kong	MomentsApiRegion.HongKong	ap-east-1
custom	MomentsApiRegion.Custom	Custom String

Step 3: Set the Referrer for Added Security

The referrer option can be used for added security. It must match the “Domain Allow List” in the Tealium UI.

config.momentsAPIReferrer = "https://your.custom.referrer.url"

config.momentsApiReferrer = "https://your.custom.referrer.url"

Step 4: Fetch Engine Response

Implement a function to fetch the Context API engine response. Call this method any time you need to retrieve the latest information about the app user.

The Tealium Visitor ID of the current app user is automatically sent as part of the Context API request.

import TealiumMomentsAPI

func fetchMoments(engineId: String, completion: @escaping (Result<EngineResponse, Error>) -> Void) {
    tealium?.momentsAPI?.fetchEngineResponse(
        engineID: engineId,
        completion: { engineResponse in
            switch engineResponse {
            case .success(let response):
                print("String attributes: \(response.strings ?? [])")
                print("Boolean attributes: \(response.booleans ?? [])")
                print("Audiences: \(response.audiences ?? [])")
                print("Date attributes: \(response.dates ?? [:])")
                print("Badges: \(response.badges ?? [])")
                print("Numbers: \(response.numbers ?? [:])")
            case .failure(let error):
                print("Error fetching moments: \(error.localizedDescription)")
            }
            completion(engineResponse)
        }
    )
}

import android.util.Log
import com.tealium.momentsapi.EngineResponse
import com.tealium.momentsapi.ErrorCode
import com.tealium.momentsapi.ResponseListener
import com.tealium.core.Tealium

fun fetchMoments(engineId: String, responseListener: ResponseListener<EngineResponse>) {
    val tealiumInstance = Tealium["your_instance_name"]
    tealiumInstance?.momentsApi?.fetchEngineResponse(engineId, object : ResponseListener<EngineResponse> {
        override fun success(data: EngineResponse) {
            Log.d("MomentsAPI", "String attributes: ${data.strings}")
            Log.d("MomentsAPI", "Boolean attributes: ${data.booleans}")
            Log.d("MomentsAPI", "Audiences: ${data.audiences}")
            Log.d("MomentsAPI", "Date attributes: ${data.dates}")
            Log.d("MomentsAPI", "Badges: ${data.badges}")
            Log.d("MomentsAPI", "Numbers: ${data.numbers}")

            responseListener.success(data)
        }

        override fun failure(errorCode: ErrorCode, message: String) {
            Log.e("MomentsAPI", "Error fetching moments: $errorCode - $message")
            responseListener.failure(errorCode, message)
        }
    })
}