diff --git a/frontend/url.ts b/frontend/url.ts
index 74a836e0b9..7df15f7da3 100644
--- a/frontend/url.ts
+++ b/frontend/url.ts
@@ -1,16 +1,32 @@
 // Copyright (c) 2016 Brandon Thomas <bt@brand.io, echelon@gmail.com>
 
+import $ = require('jquery');
 import { RawSentence, FilteredSentence } from "./sentence";
 
 import URI = require('urijs');
 
+/**
+ * The API server hostname (including HTTP scheme).
+ * This is injected into the meta tags before upload so we can build the path.
+ */
+function getApiHost(): string {
+  let environment = $('meta[name=environment]').attr('content');
+  switch (environment.toLowerCase()) {
+    case 'production':
+      return $('meta[name=api_host]').attr('content');
+    default:
+      return '';
+  }
+}
+
 /**
  * Sentence -> Audio generation API URL
  */
 export function get_audio_api_url(sentence: FilteredSentence) : string {
   // I may expand the API later, but for now this is all I'll expose.
-  let encoded = encodeURIComponent(sentence.value);
-  return `/speak?v=trump&vol=3&s=${encoded}`;
+  let apiHost = getApiHost(),
+      encoded = encodeURIComponent(sentence.value);
+  return `${apiHost}/speak?v=trump&vol=3&s=${encoded}`;
 }
 
 /**
diff --git a/s3-deploy.sh b/s3-deploy.sh
index 3f63e6c65e..7d96571877 100755
--- a/s3-deploy.sh
+++ b/s3-deploy.sh
@@ -36,8 +36,10 @@ pushd $output_dir > /dev/null
 sed -i "s/assets\/output/assets/g" index.html
 # /assets/main.built.js -> //cdn.junglehorse.com/assets/${checksum}/main.built.js
 sed -i "s/\/assets/\/\/cdn.junglehorse.com\/assets\/${checksum}/g" index.html
+# Variable substitutions
 sed -i "s/asset_content_hash/${checksum}/g" index.html
 sed -i "s/DEVELOPMENT/production/g" index.html
+sed -i "s/API_HOST/http:\/\/jungle.horse/g" index.html
 popd > /dev/null
 
 echo "> Upload to S3."
diff --git a/web/index.html b/web/index.html
index 73d11f0102..00fe7349b0 100644
--- a/web/index.html
+++ b/web/index.html
@@ -10,6 +10,7 @@
     <link href="https://fonts.googleapis.com/css?family=Fira+Sans" rel="stylesheet">
     <meta name="content_hash" content="asset_content_hash">
     <meta name="environment" content="DEVELOPMENT">
+    <meta name="api_host" content="API_HOST">
   </head>
   <body>
     <div id="animation"></div>