diff --git a/.claude-plugin/marketplace.json b/.claude-plugin/marketplace.json
index 685204c..d54c2b8 100644
--- a/.claude-plugin/marketplace.json
+++ b/.claude-plugin/marketplace.json
@@ -6,14 +6,14 @@
   },
   "metadata": {
     "description": "Official Perplexity AI plugin providing real-time web search, reasoning, and research capabilities",
-    "version": "0.8.4"
+    "version": "0.9.0"
   },
   "plugins": [
     {
       "name": "perplexity",
       "source": "./",
       "description": "Real-time web search, reasoning, and research through Perplexity's API",
-      "version": "0.8.4",
+      "version": "0.9.0",
       "author": {
         "name": "Perplexity AI",
         "email": "api@perplexity.ai"
diff --git a/package-lock.json b/package-lock.json
index 3c198dd..c5096c6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@perplexity-ai/mcp-server",
-  "version": "0.8.4",
+  "version": "0.9.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@perplexity-ai/mcp-server",
-      "version": "0.8.4",
+      "version": "0.9.0",
       "license": "MIT",
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.21.1",
diff --git a/package.json b/package.json
index e0a69fd..c34f6d4 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@perplexity-ai/mcp-server",
-  "version": "0.8.4",
+  "version": "0.9.0",
   "mcpName": "ai.perplexity/mcp-server",
   "description": "Real-time web search, reasoning, and research through Perplexity's API",
   "keywords": [
diff --git a/server.json b/server.json
index 4764650..0ebc5cd 100644
--- a/server.json
+++ b/server.json
@@ -3,12 +3,12 @@
   "name": "ai.perplexity/mcp-server",
   "title": "Perplexity API Platform",
   "description": "Real-time web search, reasoning, and research through Perplexity's API",
-  "version": "0.8.4",
+  "version": "0.9.0",
   "packages": [
     {
       "registryType": "npm",
       "identifier": "@perplexity-ai/mcp-server",
-      "version": "0.8.4",
+      "version": "0.9.0",
       "transport": {
         "type": "stdio"
       }
diff --git a/src/index.test.ts b/src/index.test.ts
index 70499a7..21897b8 100644
--- a/src/index.test.ts
+++ b/src/index.test.ts
@@ -79,10 +79,11 @@ describe("Perplexity MCP Server", () => {
         "https://api.perplexity.ai/chat/completions",
         expect.objectContaining({
           method: "POST",
-          headers: {
+          headers: expect.objectContaining({
             "Content-Type": "application/json",
             Authorization: "Bearer test-api-key",
-          },
+            "X-Source": "pplx-mcp-server",
+          }),
           body: JSON.stringify({
             model: "sonar-pro",
             messages,
@@ -200,10 +201,10 @@ describe("Perplexity MCP Server", () => {
         "https://api.perplexity.ai/search",
         expect.objectContaining({
           method: "POST",
-          headers: {
+          headers: expect.objectContaining({
             "Content-Type": "application/json",
             Authorization: "Bearer test-api-key",
-          },
+          }),
           body: JSON.stringify({
             query: "test query",
             max_results: 10,
diff --git a/src/server.ts b/src/server.ts
index c8954a7..d649ccb 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -13,6 +13,7 @@ import { ChatCompletionResponseSchema, SearchResponseSchema } from "./validation
 
 const PERPLEXITY_API_KEY = process.env.PERPLEXITY_API_KEY;
 const PERPLEXITY_BASE_URL = process.env.PERPLEXITY_BASE_URL || "https://api.perplexity.ai";
+const VERSION = "0.9.0";
 
 export function getProxyUrl(): string | undefined {
   return process.env.PERPLEXITY_PROXY || 
@@ -81,6 +82,8 @@ async function makeApiRequest(
     const headers: Record<string, string> = {
       "Content-Type": "application/json",
       "Authorization": `Bearer ${PERPLEXITY_API_KEY}`,
+      "User-Agent": `perplexity-mcp/${VERSION}`,
+      "X-Source": "pplx-mcp-server",
     };
     if (serviceOrigin) {
       headers["X-Service"] = serviceOrigin;
@@ -299,7 +302,7 @@ export function createPerplexityServer(serviceOrigin?: string) {
   const server = new McpServer(
     {
       name: "ai.perplexity/mcp-server",
-      version: "0.8.4",
+      version: VERSION,
     },
     {
       instructions: