diff --git a/packages/fdc3-get-agent/test/support/TestServerContext.ts b/packages/fdc3-get-agent/test/support/TestServerContext.ts
index ebc021d7a..3241441ba 100644
--- a/packages/fdc3-get-agent/test/support/TestServerContext.ts
+++ b/packages/fdc3-get-agent/test/support/TestServerContext.ts
@@ -30,7 +30,7 @@ export class TestServerContext implements ServerContext<ConnectionDetails> {
         this.cw = cw
     }
 
-    async narrowIntents(appIntents: AppIntent[], _context: Context): Promise<AppIntent[]> {
+    async narrowIntents(_raiser: AppIdentifier, appIntents: AppIntent[], _context: Context): Promise<AppIntent[]> {
         return appIntents
     }
 
diff --git a/toolbox/fdc3-for-web/demo/src/client/da/DemoServerContext.ts b/toolbox/fdc3-for-web/demo/src/client/da/DemoServerContext.ts
index e6dded167..0360075d1 100644
--- a/toolbox/fdc3-for-web/demo/src/client/da/DemoServerContext.ts
+++ b/toolbox/fdc3-for-web/demo/src/client/da/DemoServerContext.ts
@@ -2,7 +2,7 @@ import { AppRegistration, Directory, DirectoryApp, InstanceID, ServerContext, St
 import { Socket } from 'socket.io-client';
 import { v4 as uuid } from 'uuid'
 import { FDC3_DA_EVENT } from '../../message-types';
-import { AppIntent, Context, OpenError } from '@kite9/fdc3';
+import { AppIdentifier, AppIntent, Context, OpenError } from '@kite9/fdc3';
 
 enum Opener { Tab, Frame, Nested }
 
@@ -24,7 +24,7 @@ export class DemoServerContext implements ServerContext<DemoRegistration> {
         this.directory = directory
     }
 
-    async narrowIntents(appIntents: AppIntent[], _context: Context): Promise<AppIntent[]> {
+    async narrowIntents(_raiser: AppIdentifier, appIntents: AppIntent[], _context: Context): Promise<AppIntent[]> {
         console.log("Narrow intents - not doing anything")
         return appIntents
     }
diff --git a/toolbox/fdc3-for-web/fdc3-web-impl/src/ServerContext.ts b/toolbox/fdc3-for-web/fdc3-web-impl/src/ServerContext.ts
index f07216e4a..3b9ac236e 100644
--- a/toolbox/fdc3-for-web/fdc3-web-impl/src/ServerContext.ts
+++ b/toolbox/fdc3-for-web/fdc3-web-impl/src/ServerContext.ts
@@ -1,4 +1,4 @@
-import { AppIntent } from "@kite9/fdc3-standard";
+import { AppIdentifier, AppIntent } from "@kite9/fdc3-standard";
 import { Context } from "@kite9/fdc3-context";
 
 export enum State {
@@ -106,5 +106,5 @@ export interface ServerContext<X extends AppRegistration> {
      * an opportunity for the server to either present an intent resolver 
      * or otherwise mess with the availble intents, or do nothing.
      */
-    narrowIntents(appIntents: AppIntent[], context: Context): Promise<AppIntent[]>
+    narrowIntents(raiser: AppIdentifier, IappIntents: AppIntent[], context: Context): Promise<AppIntent[]>
 }
diff --git a/toolbox/fdc3-for-web/fdc3-web-impl/src/handlers/IntentHandler.ts b/toolbox/fdc3-for-web/fdc3-web-impl/src/handlers/IntentHandler.ts
index d43d4c8df..17173e78a 100644
--- a/toolbox/fdc3-for-web/fdc3-web-impl/src/handlers/IntentHandler.ts
+++ b/toolbox/fdc3-for-web/fdc3-web-impl/src/handlers/IntentHandler.ts
@@ -120,8 +120,8 @@ export class IntentHandler implements MessageHandler {
     shutdown(): void {
     }
 
-    async narrowIntents(appIntents: AppIntent[], context: Context, sc: ServerContext<AppRegistration>): Promise<AppIntent[]> {
-        const out = await sc.narrowIntents(appIntents, context)
+    async narrowIntents(raiser: AppIdentifier, appIntents: AppIntent[], context: Context, sc: ServerContext<AppRegistration>): Promise<AppIntent[]> {
+        const out = await sc.narrowIntents(raiser, appIntents, context)
         return out
     }
 
@@ -274,7 +274,7 @@ export class IntentHandler implements MessageHandler {
 
         const appIntents = this.createAppIntents(arg0, [...runningApps, { appId: target.appId }])
 
-        const narrowedAppIntents = await this.narrowIntents(appIntents, arg0[0].context, sc)
+        const narrowedAppIntents = await this.narrowIntents(arg0[0].from, appIntents, arg0[0].context, sc)
 
         if (narrowedAppIntents.length == 1) {
             if ((narrowedAppIntents[0].apps.length == 2) && (narrowedAppIntents[0].apps[0].instanceId)) {
@@ -337,7 +337,7 @@ export class IntentHandler implements MessageHandler {
             }
         })
 
-        const narrowedAppIntents = await this.narrowIntents(appIntents, arg0[0].context, sc)
+        const narrowedAppIntents = await this.narrowIntents(arg0[0].from, appIntents, arg0[0].context, sc)
 
         if (narrowedAppIntents.length == 0) {
             // nothing can resolve the intent, fail