diff --git a/Sources/BraintreeCore/Analytics/FPTIBatchData.swift b/Sources/BraintreeCore/Analytics/FPTIBatchData.swift
index 0284172c3..d4fe4845e 100644
--- a/Sources/BraintreeCore/Analytics/FPTIBatchData.swift
+++ b/Sources/BraintreeCore/Analytics/FPTIBatchData.swift
@@ -53,9 +53,10 @@ struct FPTIBatchData: Codable {
         /// Used for linking events from the client to server side request
         /// This value will be PayPal Order ID, Payment Token, EC token, Billing Agreement, or Venmo Context ID depending on the flow
         let payPalContextID: String?
-
         /// UTC millisecond timestamp when a networking task started requesting a resource. See [Apple's docs](https://developer.apple.com/documentation/foundation/urlsessiontasktransactionmetrics#3162615).
         let requestStartTime: Int?
+        /// This value should be the shopper session ID returned from your server SDK request
+        let sessionID: String?
         /// UTC millisecond timestamp when a networking task initiated.
         let startTime: Int?
         let timestamp = String(Date().utcTimestampMilliseconds)
@@ -76,6 +77,7 @@ struct FPTIBatchData: Codable {
             paymentMethodsDisplayed: String? = nil,
             payPalContextID: String? = nil,
             requestStartTime: Int? = nil,
+            sessionID: String? = nil,
             startTime: Int? = nil
         ) {
             self.appSwitchURL = appSwitchURL?.absoluteString
@@ -92,6 +94,7 @@ struct FPTIBatchData: Codable {
             self.paymentMethodsDisplayed = paymentMethodsDisplayed
             self.payPalContextID = payPalContextID
             self.requestStartTime = requestStartTime
+            self.sessionID = sessionID
             self.startTime = startTime
         }
 
@@ -110,6 +113,7 @@ struct FPTIBatchData: Codable {
             case requestStartTime = "request_start_time"
             case timestamp = "t"
             case tenantName = "tenant_name"
+            case sessionID = "session_id"
             case startTime = "start_time"
             case endTime = "end_time"
             case endpoint = "endpoint"
diff --git a/Sources/BraintreeCore/BTAPIClient.swift b/Sources/BraintreeCore/BTAPIClient.swift
index 1d3b04f4d..787f8d2bf 100644
--- a/Sources/BraintreeCore/BTAPIClient.swift
+++ b/Sources/BraintreeCore/BTAPIClient.swift
@@ -311,7 +311,8 @@ import Foundation
         linkType: LinkType? = nil,
         paymentMethodsDisplayed: String? = nil,
         payPalContextID: String? = nil,
-        appSwitchURL: URL? = nil
+        appSwitchURL: URL? = nil,
+        sessionID: String? = nil
     ) {
         analyticsService.sendAnalyticsEvent(
             FPTIBatchData.Event(
@@ -324,7 +325,8 @@ import Foundation
                 linkType: linkType?.rawValue,
                 merchantExperiment: merchantExperiment,
                 paymentMethodsDisplayed: paymentMethodsDisplayed,
-                payPalContextID: payPalContextID
+                payPalContextID: payPalContextID,
+                sessionID: sessionID
             )
         )
     }
diff --git a/Sources/BraintreeShopperInsights/BTShopperInsightsClient.swift b/Sources/BraintreeShopperInsights/BTShopperInsightsClient.swift
index e5dc83a6c..60ce1cc3c 100644
--- a/Sources/BraintreeShopperInsights/BTShopperInsightsClient.swift
+++ b/Sources/BraintreeShopperInsights/BTShopperInsightsClient.swift
@@ -17,6 +17,9 @@ public class BTShopperInsightsClient {
     // MARK: - Private Properties
     
     private let apiClient: BTAPIClient
+
+    /// This value should be the shopper session ID returned from your server SDK request
+    private let shopperSessionID: String? = ""
     
     /// Creates a `BTShopperInsightsClient`
     /// - Parameter apiClient: A `BTAPIClient` instance.
@@ -127,7 +130,8 @@ public class BTShopperInsightsClient {
     private func notifySuccess(with result: BTShopperInsightsResult, for experiment: String?) -> BTShopperInsightsResult {
         apiClient.sendAnalyticsEvent(
             BTShopperInsightsAnalytics.recommendedPaymentsSucceeded,
-            merchantExperiment: experiment
+            merchantExperiment: experiment,
+            sessionID: shopperSessionID
         )
         return result
     }
@@ -136,7 +140,8 @@ public class BTShopperInsightsClient {
         apiClient.sendAnalyticsEvent(
             BTShopperInsightsAnalytics.recommendedPaymentsFailed,
             errorDescription: error.localizedDescription,
-            merchantExperiment: experiment
+            merchantExperiment: experiment,
+            sessionID: shopperSessionID
         )
         return error
     }
diff --git a/UnitTests/BraintreeCoreTests/Analytics/FPTIBatchData_Tests.swift b/UnitTests/BraintreeCoreTests/Analytics/FPTIBatchData_Tests.swift
index 72b5f2b5d..d985810cd 100644
--- a/UnitTests/BraintreeCoreTests/Analytics/FPTIBatchData_Tests.swift
+++ b/UnitTests/BraintreeCoreTests/Analytics/FPTIBatchData_Tests.swift
@@ -28,6 +28,7 @@ final class FPTIBatchData_Tests: XCTestCase {
             linkType: LinkType.universal.rawValue,
             payPalContextID: "fake-order-id",
             requestStartTime: 456,
+            sessionID: "123456",
             startTime: 999888777666
         ),
         FPTIBatchData.Event(
@@ -42,16 +43,17 @@ final class FPTIBatchData_Tests: XCTestCase {
             linkType: nil,
             payPalContextID: "fake-order-id-2",
             requestStartTime: nil,
+            sessionID: nil,
             startTime: nil
         )
     ]
-    
+
     override func setUp() {
         super.setUp()
         
         sut = FPTIBatchData(metadata: batchMetadata, events: eventParams)
     }
-    
+
     func testInit_formatsJSONBody() throws {
         let jsonBody = try sut.toDictionary()
         
@@ -59,12 +61,12 @@ final class FPTIBatchData_Tests: XCTestCase {
             XCTFail("JSON body missing top level `events` key.")
             return
         }
-        
+
         guard let eventParams = events[0]["event_params"] as? [[String: Any]] else {
             XCTFail("JSON body missing `event_params` key.")
             return
         }
-        
+
         guard let batchParams = events[0]["batch_params"] as? [String: Any]  else {
             XCTFail("JSON body missing `batch_params` key.")
             return
@@ -121,6 +123,8 @@ final class FPTIBatchData_Tests: XCTestCase {
         XCTAssertNil(eventParams[1]["connect_start_time"])
         XCTAssertEqual(eventParams[0]["request_start_time"] as? Int, 456)
         XCTAssertNil(eventParams[1]["request_start_time"])
+        XCTAssertEqual(eventParams[0]["session_id"] as? String, "123456")
+        XCTAssertNil(eventParams[1]["session_id"])
     }
 }