diff --git a/src/index.test.ts b/src/index.test.ts
index bdf1d65..6c05141 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -124,11 +124,13 @@ describe("Perplexity MCP Server", () => {
         AGENT_URL,
         expect.objectContaining({
           method: "POST",
-          headers: expect.objectContaining({
+          headers: {
             "Content-Type": "application/json",
             Authorization: "Bearer test-api-key",
+            "User-Agent": "perplexity-mcp/1.2.0",
             "X-Source": "pplx-mcp-server",
-          }),
+            "X-Pplx-Integration": "perplexity-mcp/1.2.0",
+          },
           body: JSON.stringify({
             preset: "fast",
             input: [{ type: "message", role: "user", content: "test question" }],
diff --git a/src/server.ts b/src/server.ts
index 56c0be1..ad11f35 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -111,6 +111,7 @@ async function makeApiRequest(
       "Authorization": `Bearer ${resolvedApiKey}`,
       "User-Agent": `perplexity-mcp/${VERSION}`,
       "X-Source": "pplx-mcp-server",
+      "X-Pplx-Integration": `perplexity-mcp/${VERSION}`,
     };
     if (serviceOrigin) {
       headers["X-Service"] = serviceOrigin;