diff --git a/mindspace-chat-plaza.test.mjs b/mindspace-chat-plaza.test.mjs
index dcccced..40bd4b8 100644
--- a/mindspace-chat-plaza.test.mjs
+++ b/mindspace-chat-plaza.test.mjs
@@ -1,6 +1,11 @@
 import test from 'node:test';
 import assert from 'node:assert/strict';
 import { slugFromPageTitle } from './mindspace-chat-plaza.mjs';
+import { MINDSPACE_SERVER_ADAPTER_BINDINGS } from './mindspace-server-adapter-contract.mjs';
+
+test('adapter contract exposes findPageBySourceMessage for quick plaza', () => {
+  assert.ok(MINDSPACE_SERVER_ADAPTER_BINDINGS.pageService.includes('findPageBySourceMessage'));
+});
 
 test('slugFromPageTitle falls back to page when title has no ascii', () => {
   assert.equal(slugFromPageTitle('春江花月夜', '1c99b83b-0454-474f-a5d2-129d34506a32'), 'page-1c99b83b');
diff --git a/mindspace-server-adapter-contract.mjs b/mindspace-server-adapter-contract.mjs
index d3783ff..b3200ee 100644
--- a/mindspace-server-adapter-contract.mjs
+++ b/mindspace-server-adapter-contract.mjs
@@ -30,6 +30,7 @@ export const MINDSPACE_SERVER_ADAPTER_BINDINGS = Object.freeze({
     'deletePage',
     'findPageByRelativePath',
     'findPageBySourceAsset',
+    'findPageBySourceMessage',
     'getDeletePreview',
     'getPage',
     'listPages',