diff --git a/libraries/fetch-utils/index.js b/libraries/fetch-utils/index.js
index 5e2cf16d1d..5ac0fc2ce5 100644
--- a/libraries/fetch-utils/index.js
+++ b/libraries/fetch-utils/index.js
@@ -9,8 +9,8 @@ const https = require('https')
  * Make a request and return the parsed JSON response.
  *
  * @param {string | URL} url - request URL
- * @param {object} opts - fetch options
- * @return {Promise<object>} the parsed JSON response
+ * @param {any} [opts] - fetch options
+ * @return {Promise<any>} the parsed JSON response
  * @throws {RequestFailedError} if the response has a failure status code
  */
 async function fetchJson(url, opts = {}) {
@@ -39,7 +39,7 @@ async function fetchJsonWithResponse(url, opts = {}) {
  * If the response body is destroyed, the request is aborted.
  *
  * @param {string | URL} url - request URL
- * @param {object} opts - fetch options
+ * @param {any} [opts] - fetch options
  * @return {Promise<Readable>}
  * @throws {RequestFailedError} if the response has a failure status code
  */
@@ -67,7 +67,7 @@ async function fetchStreamWithResponse(url, opts = {}) {
  * Make a request and discard the response.
  *
  * @param {string | URL} url - request URL
- * @param {object} opts - fetch options
+ * @param {any} [opts] - fetch options
  * @return {Promise<Response>}
  * @throws {RequestFailedError} if the response has a failure status code
  */
@@ -86,7 +86,7 @@ async function fetchNothing(url, opts = {}) {
  * Make a request and extract the redirect from the response.
  *
  * @param {string | URL} url - request URL
- * @param {object} opts - fetch options
+ * @param {any} [opts] - fetch options
  * @return {Promise<string>}
  * @throws {RequestFailedError} if the response has a non redirect status code or missing Location header
  */
@@ -115,7 +115,7 @@ async function fetchRedirect(url, opts = {}) {
  * Make a request and return a string.
  *
  * @param {string | URL} url - request URL
- * @param {object} opts - fetch options
+ * @param {any} [opts] - fetch options
  * @return {Promise<string>}
  * @throws {RequestFailedError} if the response has a failure status code
  */
diff --git a/services/web/app/src/Features/Chat/ChatApiHandler.js b/services/web/app/src/Features/Chat/ChatApiHandler.js
index 16edb81fea..76c58d7e49 100644
--- a/services/web/app/src/Features/Chat/ChatApiHandler.js
+++ b/services/web/app/src/Features/Chat/ChatApiHandler.js
@@ -90,6 +90,13 @@ async function deleteMessage(projectId, threadId, messageId) {
   )
 }
 
+async function getResolvedThreadIds(projectId) {
+  const body = await fetchJson(
+    chatApiUrl(`/project/${projectId}/resolved-thread-ids`)
+  )
+  return body.resolvedThreadIds
+}
+
 function chatApiUrl(path) {
   return new URL(path, settings.apis.chat.internal_url)
 }
@@ -105,6 +112,7 @@ module.exports = {
   deleteThread: callbackify(deleteThread),
   editMessage: callbackify(editMessage),
   deleteMessage: callbackify(deleteMessage),
+  getResolvedThreadIds: callbackify(getResolvedThreadIds),
   promises: {
     getThreads,
     destroyProject,
@@ -116,5 +124,6 @@ module.exports = {
     deleteThread,
     editMessage,
     deleteMessage,
+    getResolvedThreadIds,
   },
 }
diff --git a/services/web/app/src/Features/Documents/DocumentController.js b/services/web/app/src/Features/Documents/DocumentController.js
index a54475b1b3..a3191881c4 100644
--- a/services/web/app/src/Features/Documents/DocumentController.js
+++ b/services/web/app/src/Features/Documents/DocumentController.js
@@ -1,3 +1,4 @@
+const ChatApiHandler = require('../Chat/ChatApiHandler')
 const ProjectGetter = require('../Project/ProjectGetter')
 const ProjectLocator = require('../Project/ProjectLocator')
 const ProjectEntityHandler = require('../Project/ProjectEntityHandler')
@@ -31,6 +32,17 @@ async function getDocument(req, res) {
     { peek }
   )
 
+  const resolvedCommentIdsInProject =
+    await ChatApiHandler.promises.getResolvedThreadIds(projectId)
+
+  const commentIdsInDoc = new Set(
+    ranges.comments?.map(comment => comment.id) ?? []
+  )
+
+  const resolvedCommentIds = resolvedCommentIdsInProject.filter(commentId =>
+    commentIdsInDoc.has(commentId)
+  )
+
   if (plain) {
     plainTextResponse(res, lines.join('\n'))
   } else {
@@ -53,6 +65,7 @@ async function getDocument(req, res) {
       projectHistoryId,
       projectHistoryType,
       historyRangesSupport,
+      resolvedCommentIds,
     })
   }
 }
diff --git a/services/web/test/unit/src/Documents/DocumentControllerTests.js b/services/web/test/unit/src/Documents/DocumentControllerTests.js
index b3c3f14fa1..d4c12de619 100644
--- a/services/web/test/unit/src/Documents/DocumentControllerTests.js
+++ b/services/web/test/unit/src/Documents/DocumentControllerTests.js
@@ -15,7 +15,26 @@ describe('DocumentController', function () {
     this.doc = { _id: 'doc-id-123' }
     this.doc_lines = ['one', 'two', 'three']
     this.version = 42
-    this.ranges = { mock: 'ranges' }
+    this.ranges = {
+      comments: [
+        {
+          id: 'comment1',
+          op: {
+            c: 'foo',
+            p: 123,
+            t: 'comment1',
+          },
+        },
+        {
+          id: 'comment2',
+          op: {
+            c: 'bar',
+            p: 456,
+            t: 'comment2',
+          },
+        },
+      ],
+    }
     this.pathname = '/a/b/c/file.tex'
     this.lastUpdatedAt = new Date().getTime()
     this.lastUpdatedBy = 'fake-last-updater-id'
@@ -29,6 +48,10 @@ describe('DocumentController', function () {
         },
       },
     }
+    this.resolvedThreadIds = [
+      'comment2',
+      'comment4', // Comment in project but not in doc
+    ]
 
     this.ProjectGetter = {
       promises: {
@@ -58,6 +81,12 @@ describe('DocumentController', function () {
       },
     }
 
+    this.ChatApiHandler = {
+      promises: {
+        getResolvedThreadIds: sinon.stub().resolves(this.resolvedThreadIds),
+      },
+    }
+
     this.DocumentController = SandboxedModule.require(MODULE_PATH, {
       requires: {
         '../Project/ProjectGetter': this.ProjectGetter,
@@ -65,6 +94,7 @@ describe('DocumentController', function () {
         '../Project/ProjectEntityHandler': this.ProjectEntityHandler,
         '../Project/ProjectEntityUpdateHandler':
           this.ProjectEntityUpdateHandler,
+        '../Chat/ChatApiHandler': this.ChatApiHandler,
       },
     })
   })
@@ -87,17 +117,16 @@ describe('DocumentController', function () {
 
       it('should return the history id and display setting to the client as JSON', function () {
         this.res.type.should.equal('application/json')
-        this.res.body.should.equal(
-          JSON.stringify({
-            lines: this.doc_lines,
-            version: this.version,
-            ranges: this.ranges,
-            pathname: this.pathname,
-            projectHistoryId: this.project.overleaf.history.id,
-            projectHistoryType: 'project-history',
-            historyRangesSupport: false,
-          })
-        )
+        JSON.parse(this.res.body).should.deep.equal({
+          lines: this.doc_lines,
+          version: this.version,
+          ranges: this.ranges,
+          pathname: this.pathname,
+          projectHistoryId: this.project.overleaf.history.id,
+          projectHistoryType: 'project-history',
+          resolvedCommentIds: ['comment2'],
+          historyRangesSupport: false,
+        })
       })
     })