diff --git a/apps/api/src/app/access/access.controller.ts b/apps/api/src/app/access/access.controller.ts
index f1c73231e..8bd22fc25 100644
--- a/apps/api/src/app/access/access.controller.ts
+++ b/apps/api/src/app/access/access.controller.ts
@@ -99,7 +99,10 @@ export class AccessController {
           ? { connect: { id: data.granteeUserId } }
           : undefined,
         permissions: data.permissions,
-        scopes: getScopesOfAccess({ permissions: data.permissions }),
+        scopes: getScopesOfAccess({
+          granteeUserId: data.granteeUserId,
+          permissions: data.permissions
+        }),
         settings: this.accessService.buildSettings(data.filters),
         user: { connect: { id: this.request.user.id } }
       });
@@ -170,6 +173,7 @@ export class AccessController {
             : { disconnect: true },
           permissions: data.permissions,
           scopes: getScopesOfAccess({
+            granteeUserId: data.granteeUserId,
             permissions: data.permissions ?? originalAccess.permissions
           }),
           settings: this.accessService.buildSettings(data.filters)
diff --git a/libs/common/src/lib/scopes.spec.ts b/libs/common/src/lib/scopes.spec.ts
index 1bb998de9..88b2ffffb 100644
--- a/libs/common/src/lib/scopes.spec.ts
+++ b/libs/common/src/lib/scopes.spec.ts
@@ -11,6 +11,7 @@ describe('Scopes', () => {
     it('Scopes take precedence over the permissions', () => {
       expect(
         getScopesOfAccess({
+          granteeUserId: 'ffb08949-2f8a-4b6e-88fd-0f1e6b6b5f5d',
           permissions: ['READ'],
           scopes: [scopes.portfolioRead]
         })
@@ -20,18 +21,65 @@ describe('Scopes', () => {
     it('Derive from the permission to read', () => {
       // An access created before the scopes have been introduced has no scopes
       expect(
-        getScopesOfAccess({ permissions: ['READ'], scopes: [] })
+        getScopesOfAccess({
+          granteeUserId: 'ffb08949-2f8a-4b6e-88fd-0f1e6b6b5f5d',
+          permissions: ['READ'],
+          scopes: []
+        })
       ).toContain(scopes.portfolioReadValues);
     });
 
     it('Derive from the permission to read restricted', () => {
       expect(
-        getScopesOfAccess({ permissions: ['READ_RESTRICTED'], scopes: [] })
+        getScopesOfAccess({
+          granteeUserId: 'ffb08949-2f8a-4b6e-88fd-0f1e6b6b5f5d',
+          permissions: ['READ_RESTRICTED'],
+          scopes: []
+        })
       ).not.toContain(scopes.portfolioReadValues);
     });
 
     it('Without permissions and scopes', () => {
-      expect(getScopesOfAccess({})).not.toContain(scopes.portfolioReadValues);
+      expect(
+        getScopesOfAccess({
+          granteeUserId: 'ffb08949-2f8a-4b6e-88fd-0f1e6b6b5f5d'
+        })
+      ).not.toContain(scopes.portfolioReadValues);
+    });
+  });
+
+  describe('Get scopes of public access', () => {
+    it('Allows reading the portfolio', () => {
+      expect(getScopesOfAccess({ permissions: ['READ_RESTRICTED'] })).toContain(
+        scopes.portfolioRead
+      );
+    });
+
+    it('Excludes the accounts and the watchlist', () => {
+      const scopesOfAccess = getScopesOfAccess({
+        permissions: ['READ_RESTRICTED']
+      });
+
+      expect(scopesOfAccess).not.toContain(scopes.accountRead);
+      expect(scopesOfAccess).not.toContain(scopes.watchlistRead);
+    });
+
+    it('Cannot be widened by the scopes', () => {
+      expect(
+        getScopesOfAccess({
+          scopes: [
+            scopes.portfolioRead,
+            scopes.portfolioReadValues,
+            scopes.watchlistRead
+          ]
+        })
+      ).toEqual([scopes.portfolioRead]);
+    });
+
+    it('Cannot be widened by the permission to read', () => {
+      expect(getScopesOfAccess({ permissions: ['READ'] })).not.toContain(
+        scopes.portfolioReadValues
+      );
     });
   });
 
diff --git a/libs/common/src/lib/scopes.ts b/libs/common/src/lib/scopes.ts
index 20b04d342..5fe97d4a6 100644
--- a/libs/common/src/lib/scopes.ts
+++ b/libs/common/src/lib/scopes.ts
@@ -14,6 +14,11 @@ export const scopes = {
   watchlistRead: 'watchlist:read'
 } as const;
 
+const SCOPES_OF_PUBLIC_ACCESS: string[] = [
+  scopes.activityRead,
+  scopes.portfolioRead
+];
+
 const SCOPES_OF_READ_RESTRICTED_ACCESS = [
   scopes.accountRead,
   scopes.activityRead,
@@ -27,21 +32,33 @@ const SCOPES_OF_READ_ACCESS = [
 ];
 
 export function getScopesOfAccess({
+  granteeUserId,
   permissions,
   scopes
 }: {
+  granteeUserId?: string | null;
   permissions?: AccessPermission[];
   scopes?: string[];
 }): string[] {
-  if (scopes?.length) {
-    return scopes;
+  let scopesOfAccess = scopes;
+
+  if (!scopesOfAccess?.length) {
+    // TODO: Remove the derivation from the permissions once they have been
+    // dropped from the access
+    scopesOfAccess = permissions?.includes('READ')
+      ? SCOPES_OF_READ_ACCESS
+      : SCOPES_OF_READ_RESTRICTED_ACCESS;
+  }
+
+  if (granteeUserId) {
+    return scopesOfAccess;
   }
 
-  // TODO: Remove the derivation from the permissions once they have been
-  // dropped from the access
-  return permissions?.includes('READ')
-    ? SCOPES_OF_READ_ACCESS
-    : SCOPES_OF_READ_RESTRICTED_ACCESS;
+  // An access which has not been granted to a user is public, hence it is
+  // narrowed to the scopes exposed by the public endpoints
+  return scopesOfAccess.filter((scope) => {
+    return SCOPES_OF_PUBLIC_ACCESS.includes(scope);
+  });
 }
 
 /**
diff --git a/prisma/migrations/20260815120000_added_scopes_to_access/migration.sql b/prisma/migrations/20260815120000_added_scopes_to_access/migration.sql
index 751c47ca8..11f344421 100644
--- a/prisma/migrations/20260815120000_added_scopes_to_access/migration.sql
+++ b/prisma/migrations/20260815120000_added_scopes_to_access/migration.sql
@@ -4,6 +4,10 @@ ALTER TABLE "Access" ADD COLUMN "scopes" TEXT[] DEFAULT ARRAY[]::TEXT[];
 -- Derive the scopes from the permissions of the existing accesses
 UPDATE "Access"
 SET "scopes" = CASE
+  WHEN "granteeUserId" IS NULL THEN ARRAY[
+    'activity:read',
+    'portfolio:read'
+  ]
   WHEN 'READ' = ANY("permissions") THEN ARRAY[
     'account:read',
     'activity:read',