diff --git a/src/mcp/index.ts b/src/mcp/index.ts
index a3ec2da..a887d8d 100644
--- a/src/mcp/index.ts
+++ b/src/mcp/index.ts
@@ -5,14 +5,21 @@ import type { McpName } from "./types"
 
 export { McpNameSchema, type McpName } from "./types"
 
-const allBuiltinMcps: Record<McpName, { type: "remote"; url: string; enabled: boolean }> = {
+type RemoteMcpConfig = {
+  type: "remote"
+  url: string
+  enabled: boolean
+  headers?: Record<string, string>
+}
+
+const allBuiltinMcps: Record<McpName, RemoteMcpConfig> = {
   websearch,
   context7,
   grep_app,
 }
 
 export function createBuiltinMcps(disabledMcps: string[] = []) {
-  const mcps: Record<string, { type: "remote"; url: string; enabled: boolean }> = {}
+  const mcps: Record<string, RemoteMcpConfig> = {}
 
   for (const [name, config] of Object.entries(allBuiltinMcps)) {
     if (!disabledMcps.includes(name)) {
diff --git a/src/mcp/websearch.ts b/src/mcp/websearch.ts
index 60584e9..afc4d2b 100644
--- a/src/mcp/websearch.ts
+++ b/src/mcp/websearch.ts
@@ -2,4 +2,7 @@ export const websearch = {
   type: "remote" as const,
   url: "https://mcp.exa.ai/mcp?tools=web_search_exa",
   enabled: true,
+  headers: process.env.EXA_API_KEY
+    ? { "x-api-key": process.env.EXA_API_KEY }
+    : undefined,
 }