diff --git a/netlify/functions/agent-proxy.js b/netlify/functions/agent-proxy.js
index 1c087ba..98131c1 100644
--- a/netlify/functions/agent-proxy.js
+++ b/netlify/functions/agent-proxy.js
@@ -12,18 +12,6 @@ import Anthropic from '@anthropic-ai/sdk'
  * synchronous execution limit.
  */
 
-// ---------------------------------------------------------------------------
-// Managed Agent configuration
-// ---------------------------------------------------------------------------
-// The Managed Agent ID and Environment ID come from the Claude Console.
-// Optionally, vault IDs may be passed for MCP credential access.
-const AGENT_ID = process.env.ANTHROPIC_AGENT_ID
-const ENVIRONMENT_ID = process.env.ANTHROPIC_ENVIRONMENT_ID
-const VAULT_IDS = (process.env.ANTHROPIC_VAULT_IDS || '')
-  .split(',')
-  .map((s) => s.trim())
-  .filter(Boolean)
-
 // All Managed Agents endpoints require this beta header.
 const MANAGED_AGENTS_BETA = 'managed-agents-2026-04-01'
 
@@ -71,11 +59,21 @@ export default async (req /*, context */) => {
     return new Response('Invalid station website URL', { status: 400 })
   }
 
-  if (!AGENT_ID || !ENVIRONMENT_ID) {
-    return new Response(
-      'Server is missing ANTHROPIC_AGENT_ID or ANTHROPIC_ENVIRONMENT_ID',
-      { status: 500 },
-    )
+  // Read env vars at request time (Netlify makes them available per-invocation).
+  const AGENT_ID = process.env.ANTHROPIC_AGENT_ID
+  const ENVIRONMENT_ID = process.env.ANTHROPIC_ENVIRONMENT_ID
+  const VAULT_IDS = (process.env.ANTHROPIC_VAULT_IDS || '')
+    .split(',')
+    .map((s) => s.trim())
+    .filter(Boolean)
+
+  const missing = []
+  if (!AGENT_ID) missing.push('ANTHROPIC_AGENT_ID')
+  if (!ENVIRONMENT_ID) missing.push('ANTHROPIC_ENVIRONMENT_ID')
+  if (missing.length) {
+    return new Response(`Server is missing env var(s): ${missing.join(', ')}`, {
+      status: 500,
+    })
   }
 
   let client