diff --git a/api-specs/openrpc-dapp-api.json b/api-specs/openrpc-dapp-api.json
index b194a202..f5f6c7e1 100644
--- a/api-specs/openrpc-dapp-api.json
+++ b/api-specs/openrpc-dapp-api.json
@@ -29,13 +29,18 @@
                         "status": {
                             "$ref": "#/components/schemas/StatusEvent"
                         },
+                        "userId": {
+                            "title": "userId",
+                            "type": "string",
+                            "description": "The user ID associated with the session."
+                        },
                         "sessionToken": {
                             "title": "sessionToken",
                             "type": "string",
                             "description": "JWT authentication token (if applicable)."
                         }
                     },
-                    "required": ["status", "sessionToken"]
+                    "required": ["status", "userId", "sessionToken"]
                 }
             },
             "description": "Ensures ledger connectivity and returns the connected network information along with the user access token. Network ID should follow CAIP-2 and represent the synchronizerId."
diff --git a/api-specs/openrpc-dapp-remote-api.json b/api-specs/openrpc-dapp-remote-api.json
index 259bc12a..29db86d0 100644
--- a/api-specs/openrpc-dapp-remote-api.json
+++ b/api-specs/openrpc-dapp-remote-api.json
@@ -189,6 +189,11 @@
                             "type": "string",
                             "description": "A CAIP-2 compliant network ID, e.g. 'canton:da-mainnet'."
                         },
+                        "userId": {
+                            "title": "userId",
+                            "type": "string",
+                            "description": "The user ID associated with the session."
+                        },
                         "sessionToken": {
                             "title": "sessionToken",
                             "type": "string",
diff --git a/api-specs/openrpc-user-api.json b/api-specs/openrpc-user-api.json
index de62dd13..fe97486a 100644
--- a/api-specs/openrpc-user-api.json
+++ b/api-specs/openrpc-user-api.json
@@ -611,6 +611,11 @@
                     "network": {
                         "$ref": "#/components/schemas/Network"
                     },
+                    "userId": {
+                        "title": "userId",
+                        "type": "string",
+                        "description": "The user ID associated with the session."
+                    },
                     "accessToken": {
                         "title": "accessToken",
                         "type": "string",
diff --git a/core/splice-provider/src/SpliceProviderHttp.ts b/core/splice-provider/src/SpliceProviderHttp.ts
index 74104c4b..042abe02 100644
--- a/core/splice-provider/src/SpliceProviderHttp.ts
+++ b/core/splice-provider/src/SpliceProviderHttp.ts
@@ -13,6 +13,7 @@ import { popupHref } from '@canton-network/core-wallet-ui-components'
 
 export class SpliceProviderHttp extends SpliceProviderBase {
     private sessionToken?: string
+    private userId?: string
     private socket: Socket
     private transport: HttpTransport
 
@@ -42,11 +43,13 @@ export class SpliceProviderHttp extends SpliceProviderBase {
 
     constructor(
         private url: URL,
-        sessionToken?: string
+        sessionToken?: string,
+        userId?: string
     ) {
         super()
 
         if (sessionToken) this.sessionToken = sessionToken
+        if (userId) this.userId = userId
         this.transport = new HttpTransport(url, sessionToken)
 
         this.socket = this.openSocket(url)
@@ -78,6 +81,7 @@ export class SpliceProviderHttp extends SpliceProviderBase {
                             kernel: statusResult.kernel,
                             networkId: statusResult.networkId,
                             sessionToken: this.sessionToken,
+                            userId: this.userId,
                         })
                     })
                     .catch((err) => {
diff --git a/core/wallet-dapp-remote-rpc-client/src/index.ts b/core/wallet-dapp-remote-rpc-client/src/index.ts
index 9a4b1336..a9499e2c 100644
--- a/core/wallet-dapp-remote-rpc-client/src/index.ts
+++ b/core/wallet-dapp-remote-rpc-client/src/index.ts
@@ -98,6 +98,12 @@ export interface JsPrepareSubmissionResponse {
  */
 export type UserUrl = string
 export type Response = string
+/**
+ *
+ * The user ID associated with the session.
+ *
+ */
+export type UserId = string
 /**
  *
  * Set as primary wallet for dApp usage.
@@ -307,6 +313,7 @@ export interface LedgerApiResult {
 export interface OnConnectedEvent {
     kernel: KernelInfo
     networkId: NetworkId
+    userId?: UserId
     sessionToken?: SessionToken
     [k: string]: any
 }
diff --git a/core/wallet-dapp-remote-rpc-client/src/openrpc.json b/core/wallet-dapp-remote-rpc-client/src/openrpc.json
index 259bc12a..29db86d0 100644
--- a/core/wallet-dapp-remote-rpc-client/src/openrpc.json
+++ b/core/wallet-dapp-remote-rpc-client/src/openrpc.json
@@ -189,6 +189,11 @@
                             "type": "string",
                             "description": "A CAIP-2 compliant network ID, e.g. 'canton:da-mainnet'."
                         },
+                        "userId": {
+                            "title": "userId",
+                            "type": "string",
+                            "description": "The user ID associated with the session."
+                        },
                         "sessionToken": {
                             "title": "sessionToken",
                             "type": "string",
diff --git a/core/wallet-dapp-rpc-client/src/index.ts b/core/wallet-dapp-rpc-client/src/index.ts
index 195d8944..66007719 100644
--- a/core/wallet-dapp-rpc-client/src/index.ts
+++ b/core/wallet-dapp-rpc-client/src/index.ts
@@ -68,6 +68,12 @@ export interface StatusEvent {
     networkId?: NetworkId
     [k: string]: any
 }
+/**
+ *
+ * The user ID associated with the session.
+ *
+ */
+export type UserId = string
 /**
  *
  * JWT authentication token (if applicable).
@@ -278,6 +284,7 @@ export interface LedgerApiParams {
 }
 export interface ConnectResult {
     status: StatusEvent
+    userId: UserId
     sessionToken: SessionToken
     [k: string]: any
 }
diff --git a/core/wallet-dapp-rpc-client/src/openrpc.json b/core/wallet-dapp-rpc-client/src/openrpc.json
index b194a202..f5f6c7e1 100644
--- a/core/wallet-dapp-rpc-client/src/openrpc.json
+++ b/core/wallet-dapp-rpc-client/src/openrpc.json
@@ -29,13 +29,18 @@
                         "status": {
                             "$ref": "#/components/schemas/StatusEvent"
                         },
+                        "userId": {
+                            "title": "userId",
+                            "type": "string",
+                            "description": "The user ID associated with the session."
+                        },
                         "sessionToken": {
                             "title": "sessionToken",
                             "type": "string",
                             "description": "JWT authentication token (if applicable)."
                         }
                     },
-                    "required": ["status", "sessionToken"]
+                    "required": ["status", "userId", "sessionToken"]
                 }
             },
             "description": "Ensures ledger connectivity and returns the connected network information along with the user access token. Network ID should follow CAIP-2 and represent the synchronizerId."
diff --git a/core/wallet-user-rpc-client/src/index.ts b/core/wallet-user-rpc-client/src/index.ts
index c2e9fcf8..cfd03072 100644
--- a/core/wallet-user-rpc-client/src/index.ts
+++ b/core/wallet-user-rpc-client/src/index.ts
@@ -173,6 +173,12 @@ export interface Wallet {
 export type Added = Wallet[]
 export type Removed = Wallet[]
 export type Networks = Network[]
+/**
+ *
+ * The user ID associated with the session.
+ *
+ */
+export type UserId = string
 /**
  *
  * The access token for the session.
@@ -187,6 +193,7 @@ export type Status = 'connected' | 'disconnected'
  */
 export interface Session {
     network: Network
+    userId?: UserId
     accessToken: AccessToken
     status: Status
 }
@@ -285,6 +292,7 @@ export interface ListNetworksResult {
  */
 export interface AddSessionResult {
     network: Network
+    userId?: UserId
     accessToken: AccessToken
     status: Status
 }
diff --git a/core/wallet-user-rpc-client/src/openrpc.json b/core/wallet-user-rpc-client/src/openrpc.json
index de62dd13..fe97486a 100644
--- a/core/wallet-user-rpc-client/src/openrpc.json
+++ b/core/wallet-user-rpc-client/src/openrpc.json
@@ -611,6 +611,11 @@
                     "network": {
                         "$ref": "#/components/schemas/Network"
                     },
+                    "userId": {
+                        "title": "userId",
+                        "type": "string",
+                        "description": "The user ID associated with the session."
+                    },
                     "accessToken": {
                         "title": "accessToken",
                         "type": "string",
diff --git a/sdk/dapp-sdk/src/dapp-api/rpc-gen/typings.ts b/sdk/dapp-sdk/src/dapp-api/rpc-gen/typings.ts
index e9567b2e..c8a27e40 100644
--- a/sdk/dapp-sdk/src/dapp-api/rpc-gen/typings.ts
+++ b/sdk/dapp-sdk/src/dapp-api/rpc-gen/typings.ts
@@ -68,6 +68,12 @@ export interface StatusEvent {
     networkId?: NetworkId
     [k: string]: any
 }
+/**
+ *
+ * The user ID associated with the session.
+ *
+ */
+export type UserId = string
 /**
  *
  * JWT authentication token (if applicable).
@@ -278,6 +284,7 @@ export interface LedgerApiParams {
 }
 export interface ConnectResult {
     status: StatusEvent
+    userId: UserId
     sessionToken: SessionToken
     [k: string]: any
 }
diff --git a/sdk/dapp-sdk/src/provider.ts b/sdk/dapp-sdk/src/provider.ts
index fb1b42e5..42bc3783 100644
--- a/sdk/dapp-sdk/src/provider.ts
+++ b/sdk/dapp-sdk/src/provider.ts
@@ -35,7 +35,11 @@ export class Provider implements SpliceProvider {
     private httpProvider?: SpliceProvider
     private windowProvider?: SpliceProvider
 
-    constructor({ walletType, url }: DiscoverResult, sessionToken?: string) {
+    constructor(
+        { walletType, url }: DiscoverResult,
+        sessionToken?: string,
+        userId?: string
+    ) {
         if (walletType == 'extension') {
             this.providerType = ProviderType.WINDOW
             this.windowProvider = new SpliceProviderWindow()
@@ -43,7 +47,8 @@ export class Provider implements SpliceProvider {
             this.providerType = ProviderType.HTTP
             this.httpProvider = new SpliceProviderHttp(
                 new URL(url),
-                sessionToken
+                sessionToken,
+                userId
             )
         } else {
             throw new Error(`Unsupported wallet type ${walletType}`)
@@ -170,6 +175,7 @@ export const dappController = (provider: SpliceProvider) =>
                         (event) => {
                             clearTimeout(timeout)
                             const result: dappAPI.ConnectResult = {
+                                userId: event.userId ?? '',
                                 sessionToken: event.sessionToken ?? '',
                                 status: {
                                     ...event,
diff --git a/wallet-gateway/extension/src/dapp-api/rpc-gen/typings.ts b/wallet-gateway/extension/src/dapp-api/rpc-gen/typings.ts
index e9567b2e..c8a27e40 100644
--- a/wallet-gateway/extension/src/dapp-api/rpc-gen/typings.ts
+++ b/wallet-gateway/extension/src/dapp-api/rpc-gen/typings.ts
@@ -68,6 +68,12 @@ export interface StatusEvent {
     networkId?: NetworkId
     [k: string]: any
 }
+/**
+ *
+ * The user ID associated with the session.
+ *
+ */
+export type UserId = string
 /**
  *
  * JWT authentication token (if applicable).
@@ -278,6 +284,7 @@ export interface LedgerApiParams {
 }
 export interface ConnectResult {
     status: StatusEvent
+    userId: UserId
     sessionToken: SessionToken
     [k: string]: any
 }
diff --git a/wallet-gateway/remote/src/dapp-api/controller.ts b/wallet-gateway/remote/src/dapp-api/controller.ts
index 12243777..e314f4d3 100644
--- a/wallet-gateway/remote/src/dapp-api/controller.ts
+++ b/wallet-gateway/remote/src/dapp-api/controller.ts
@@ -58,6 +58,7 @@ export const dappController = (
     const logger = _logger.child({ component: 'dapp-controller' })
     return buildController({
         connect: async () => ({
+            userId: '',
             sessionToken: '',
             status: {
                 kernel: kernelInfo,
diff --git a/wallet-gateway/remote/src/dapp-api/rpc-gen/typings.ts b/wallet-gateway/remote/src/dapp-api/rpc-gen/typings.ts
index e0bbac7a..9d39e437 100644
--- a/wallet-gateway/remote/src/dapp-api/rpc-gen/typings.ts
+++ b/wallet-gateway/remote/src/dapp-api/rpc-gen/typings.ts
@@ -98,6 +98,12 @@ export interface JsPrepareSubmissionResponse {
  */
 export type UserUrl = string
 export type Response = string
+/**
+ *
+ * The user ID associated with the session.
+ *
+ */
+export type UserId = string
 /**
  *
  * Set as primary wallet for dApp usage.
@@ -307,6 +313,7 @@ export interface LedgerApiResult {
 export interface OnConnectedEvent {
     kernel: KernelInfo
     networkId: NetworkId
+    userId?: UserId
     sessionToken?: SessionToken
     [k: string]: any
 }
diff --git a/wallet-gateway/remote/src/user-api/rpc-gen/typings.ts b/wallet-gateway/remote/src/user-api/rpc-gen/typings.ts
index 073d5f29..ce5345b3 100644
--- a/wallet-gateway/remote/src/user-api/rpc-gen/typings.ts
+++ b/wallet-gateway/remote/src/user-api/rpc-gen/typings.ts
@@ -173,6 +173,12 @@ export interface Wallet {
 export type Added = Wallet[]
 export type Removed = Wallet[]
 export type Networks = Network[]
+/**
+ *
+ * The user ID associated with the session.
+ *
+ */
+export type UserId = string
 /**
  *
  * The access token for the session.
@@ -187,6 +193,7 @@ export type Status = 'connected' | 'disconnected'
  */
 export interface Session {
     network: Network
+    userId?: UserId
     accessToken: AccessToken
     status: Status
 }
@@ -285,6 +292,7 @@ export interface ListNetworksResult {
  */
 export interface AddSessionResult {
     network: Network
+    userId?: UserId
     accessToken: AccessToken
     status: Status
 }