diff --git a/docSite/content/zh-cn/docs/development/upgrading/4814.md b/docSite/content/zh-cn/docs/development/upgrading/4814.md
index 07ae1b4263ca..5d25134621e3 100644
--- a/docSite/content/zh-cn/docs/development/upgrading/4814.md
+++ b/docSite/content/zh-cn/docs/development/upgrading/4814.md
@@ -49,3 +49,4 @@ weight: 810
 17. 修复 - 反选知识库引用后可能会报错。
 18. 修复 - 简易模式转工作流，不是使用最新编辑记录进行转移。
 19. 修复 - 表单输入的说明文字不显示。
+20. 修复 - API 无法使用 base64 图片。
diff --git a/packages/global/common/file/tools.ts b/packages/global/common/file/tools.ts
index 8cf1d3e955b2..df0de53c0507 100644
--- a/packages/global/common/file/tools.ts
+++ b/packages/global/common/file/tools.ts
@@ -23,6 +23,11 @@ export const parseUrlToFileType = (url: string): UserChatItemValueItemType['file
   const parseUrl = new URL(url, 'https://locaohost:3000');
 
   const filename = (() => {
+    // Check base64 image
+    if (url.startsWith('data:image/')) {
+      const mime = url.split(',')[0].split(':')[1].split(';')[0];
+      return `image.${mime.split('/')[1]}`;
+    }
     // Old version file url: https://xxx.com/file/read?filename=xxx.pdf
     const filenameQuery = parseUrl.searchParams.get('filename');
     if (filenameQuery) return filenameQuery;
diff --git a/packages/service/core/chat/utils.ts b/packages/service/core/chat/utils.ts
index ef3f81fea8e7..cbca1b1b3aa7 100644
--- a/packages/service/core/chat/utils.ts
+++ b/packages/service/core/chat/utils.ts
@@ -118,6 +118,11 @@ export const loadRequestMessages = async ({
             return item.image_url.url;
           })();
 
+          // base64 image
+          if (imgUrl.startsWith('data:image/')) {
+            return item;
+          }
+
           try {
             // If imgUrl is a local path, load image from local, and set url to base64
             if (imgUrl.startsWith('/')) {
diff --git a/packages/service/core/workflow/dispatch/utils.ts b/packages/service/core/workflow/dispatch/utils.ts
index 3a183988b89f..5c625013c373 100644
--- a/packages/service/core/workflow/dispatch/utils.ts
+++ b/packages/service/core/workflow/dispatch/utils.ts
@@ -129,7 +129,11 @@ export const valueTypeFormat = (value: any, type?: WorkflowIOValueTypeEnum) => {
   return value;
 };
 
-export const checkQuoteQAValue = (quoteQA: SearchDataResponseItemType[] = []) => {
+export const checkQuoteQAValue = (quoteQA?: SearchDataResponseItemType[]) => {
+  if (!quoteQA) return undefined;
+  if (quoteQA.length === 0) {
+    return [];
+  }
   if (quoteQA.some((item) => !item.q || !item.datasetId)) {
     return undefined;
   }
diff --git a/projects/app/src/pages/api/core/chat/chatTest.ts b/projects/app/src/pages/api/core/chat/chatTest.ts
index 2971d728ec4a..9794b251fa82 100644
--- a/projects/app/src/pages/api/core/chat/chatTest.ts
+++ b/projects/app/src/pages/api/core/chat/chatTest.ts
@@ -199,42 +199,44 @@ async function handler(req: NextApiRequest, res: NextApiResponse) {
     });
 
     // save chat
-    const isInteractiveRequest = !!getLastInteractiveValue(histories);
-    const { text: userInteractiveVal } = chatValue2RuntimePrompt(userQuestion.value);
+    if (!res.closed) {
+      const isInteractiveRequest = !!getLastInteractiveValue(histories);
+      const { text: userInteractiveVal } = chatValue2RuntimePrompt(userQuestion.value);
 
-    const newTitle = isPlugin
-      ? variables.cTime ?? getSystemTime(user.timezone)
-      : getChatTitleFromChatMessage(userQuestion);
+      const newTitle = isPlugin
+        ? variables.cTime ?? getSystemTime(user.timezone)
+        : getChatTitleFromChatMessage(userQuestion);
 
-    const aiResponse: AIChatItemType & { dataId?: string } = {
-      dataId: responseChatItemId,
-      obj: ChatRoleEnum.AI,
-      value: assistantResponses,
-      [DispatchNodeResponseKeyEnum.nodeResponse]: flowResponses
-    };
+      const aiResponse: AIChatItemType & { dataId?: string } = {
+        dataId: responseChatItemId,
+        obj: ChatRoleEnum.AI,
+        value: assistantResponses,
+        [DispatchNodeResponseKeyEnum.nodeResponse]: flowResponses
+      };
 
-    if (isInteractiveRequest) {
-      await updateInteractiveChat({
-        chatId,
-        appId: app._id,
-        userInteractiveVal,
-        aiResponse,
-        newVariables
-      });
-    } else {
-      await saveChat({
-        chatId,
-        appId: app._id,
-        teamId,
-        tmbId: tmbId,
-        nodes,
-        appChatConfig: chatConfig,
-        variables: newVariables,
-        isUpdateUseTime: false, // owner update use time
-        newTitle,
-        source: ChatSourceEnum.test,
-        content: [userQuestion, aiResponse]
-      });
+      if (isInteractiveRequest) {
+        await updateInteractiveChat({
+          chatId,
+          appId: app._id,
+          userInteractiveVal,
+          aiResponse,
+          newVariables
+        });
+      } else {
+        await saveChat({
+          chatId,
+          appId: app._id,
+          teamId,
+          tmbId: tmbId,
+          nodes,
+          appChatConfig: chatConfig,
+          variables: newVariables,
+          isUpdateUseTime: false, // owner update use time
+          newTitle,
+          source: ChatSourceEnum.test,
+          content: [userQuestion, aiResponse]
+        });
+      }
     }
 
     pushChatUsage({