diff --git a/backend/src/mcp/orgClient.ts b/backend/src/mcp/orgClient.ts
index bf2b5d2..ad638f1 100644
--- a/backend/src/mcp/orgClient.ts
+++ b/backend/src/mcp/orgClient.ts
@@ -1,6 +1,7 @@
 import { config } from '../config.js';
 
 type OrgToolResult = { content: { type: string; text: string }[]; isError?: boolean };
+type Envelope = { result?: OrgToolResult; error?: { message: string } };
 
 let _requestId = 1;
 
@@ -38,7 +39,19 @@ export async function callOrgTool(
       };
     }
 
-    const envelope = await res.json() as { result?: OrgToolResult; error?: { message: string } };
+    const contentType = res.headers.get('content-type') ?? '';
+    const rawText = await res.text();
+    let envelope: Envelope;
+    try {
+      envelope = contentType.includes('text/event-stream')
+        ? parseSseEnvelope(rawText)
+        : JSON.parse(rawText);
+    } catch (err) {
+      return {
+        content: [{ type: 'text', text: `Failed to parse mcp-org response (${contentType}): ${String(err)} — body: ${rawText.slice(0, 200)}` }],
+        isError: true,
+      };
+    }
     if (envelope.error) {
       return { content: [{ type: 'text', text: `mcp-org error: ${envelope.error.message}` }], isError: true };
     }
@@ -47,3 +60,14 @@ export async function callOrgTool(
     return { content: [{ type: 'text', text: `Failed to reach mcp-org: ${String(err)}` }], isError: true };
   }
 }
+
+function parseSseEnvelope(text: string): Envelope {
+  for (const frame of text.split(/\r?\n\r?\n/)) {
+    const dataLines: string[] = [];
+    for (const line of frame.split(/\r?\n/)) {
+      if (line.startsWith('data:')) dataLines.push(line.slice(5).trimStart());
+    }
+    if (dataLines.length > 0) return JSON.parse(dataLines.join('\n')) as Envelope;
+  }
+  throw new Error('no data lines in SSE response');
+}