diff --git a/Containerfile b/Containerfile
index f321f0a..24f9e91 100644
--- a/Containerfile
+++ b/Containerfile
@@ -1,4 +1,4 @@
-# IpMe - A self-hosted API for obtaining a public IP address.
+# IpMe - A self-hosted API for obtaining your public IP address.
 # Copyright (C) 2023 Foster Hangdaan <foster@hangdaan.email>
 
 # This program is free software: you can redistribute it and/or modify
diff --git a/README.org b/README.org
index 4350f15..8e00d69 100644
--- a/README.org
+++ b/README.org
@@ -2,7 +2,7 @@
 
 * About
 
-A self-hosted API for obtaining public IP address.
+A self-hosted API for obtaining your public IP address.
 
 * Contributing
 
diff --git a/main.ts b/main.ts
index b4dfe6c..da86fd7 100644
--- a/main.ts
+++ b/main.ts
@@ -1,5 +1,5 @@
 /*
- * IpMe - A self-hosted API for obtaining a public IP address.
+ * IpMe - A self-hosted API for obtaining your public IP address.
  * Copyright (C) 2023 Foster Hangdaan <foster@hangdaan.email>
  *
  * This program is free software: you can redistribute it and/or modify
@@ -20,9 +20,33 @@ import { getVersion } from "./utils/app.ts";
 
 const port = Number(Deno.env.get("PORT")) || 8000;
 
-const handler = (_req: Request): Response => {
-  return new Response("Hello world");
+const ROOT_PATTERN = new URLPattern({ pathname: "/" });
+
+const handler = (req: Request): Response => {
+  const rootMatch = ROOT_PATTERN.exec(req.url);
+
+  if (rootMatch && req.method === "GET") {
+    const clientIpAddress = req.headers.get("x-forwarded-for")?.split(",").shift() || req.headers.get("host");
+    const url = new URL(req.url);
+    const format = url.searchParams.get("format");
+
+    if (format === "json") {
+      return new Response(JSON.stringify({ ip: clientIpAddress }), {
+        headers: {
+          "content-type": "application/json",
+        },
+      });
+    } else {
+      return new Response(clientIpAddress);
+    }
+  } else {
+    return new Response("Not found", { status: 404 });
+  }
 };
 
+console.log("IpMe - A self-hosted API for obtaining your public IP address.")
 console.log(`Version: ${getVersion()}`);
+console.log("Source Code: https://code.fosterhangdaan.com/foster/ipme")
+console.log("License: GNU AGPL (version 3 or later)")
+
 Deno.serve({ port }, handler);
diff --git a/tests/main.ts b/tests/main.ts
index ffd31e0..15271d7 100644
--- a/tests/main.ts
+++ b/tests/main.ts
@@ -1,5 +1,5 @@
 /*
- * IpMe - A self-hosted API for obtaining a public IP address.
+ * IpMe - A self-hosted API for obtaining your public IP address.
  * Copyright (C) 2023 Foster Hangdaan <foster@hangdaan.email>
  *
  * This program is free software: you can redistribute it and/or modify
diff --git a/utils/app.ts b/utils/app.ts
index f9238ef..f5eb118 100644
--- a/utils/app.ts
+++ b/utils/app.ts
@@ -1,5 +1,5 @@
 /*
- * IpMe - Self-hosted API for obtaining a public IP address.
+ * IpMe - A self-hosted API for obtaining your public IP address.
  * Copyright (C) 2023 Foster Hangdaan <foster@hangdaan.email>
  *
  * This program is free software: you can redistribute it and/or modify
diff --git a/version.ts b/version.ts
index dc9ca6c..b559979 100644
--- a/version.ts
+++ b/version.ts
@@ -1,2 +1,2 @@
-const version = "0.1.0";
+const version = "0.2.0";
 export default version;