diff --git a/netlify/edge-functions/webfinger/webfinger.ts b/netlify/edge-functions/webfinger/webfinger.ts
index 4905b20..0d46bf9 100755
--- a/netlify/edge-functions/webfinger/webfinger.ts
+++ b/netlify/edge-functions/webfinger/webfinger.ts
@@ -1,28 +1,44 @@
 import type { Context } from "https://edge.netlify.com";
 
 export default async (request: Request, context: Context) => {
-  context.log(request.url);
-  return context.json({
-    subject: "acct:msfjarvis@androiddev.social",
-    aliases: [
-      "https://androiddev.social/@msfjarvis",
-      "https://androiddev.social/users/msfjarvis",
-    ],
-    links: [
-      {
-        rel: "http://webfinger.net/rel/profile-page",
-        type: "text/html",
-        href: "https://androiddev.social/@msfjarvis",
-      },
-      {
-        rel: "self",
-        type: "application/activity+json",
-        href: "https://androiddev.social/users/msfjarvis",
-      },
-      {
-        rel: "http://ostatus.org/schema/1.0/subscribe",
-        template: "https://androiddev.social/authorize_interaction?uri={uri}",
-      },
-    ],
-  });
+  const url = new URL(request.url);
+  const resourceParam = url.searchParams.get("resource");
+  context.log(`resourceParam=${resourceParam}`);
+  if (resourceParam === null) {
+    return context.json({
+      error: "No 'resource' query parameter was provided",
+    });
+  } else {
+    const re = /acct:(.*)@msfjarvis.dev/;
+    if (resourceParam.match(re) !== null) {
+      return context.json({
+        subject: "acct:msfjarvis@androiddev.social",
+        aliases: [
+          "https://androiddev.social/@msfjarvis",
+          "https://androiddev.social/users/msfjarvis",
+        ],
+        links: [
+          {
+            rel: "http://webfinger.net/rel/profile-page",
+            type: "text/html",
+            href: "https://androiddev.social/@msfjarvis",
+          },
+          {
+            rel: "self",
+            type: "application/activity+json",
+            href: "https://androiddev.social/users/msfjarvis",
+          },
+          {
+            rel: "http://ostatus.org/schema/1.0/subscribe",
+            template:
+              "https://androiddev.social/authorize_interaction?uri={uri}",
+          },
+        ],
+      });
+    } else {
+      return context.json({
+        error: "This domain only works for @msfjarvis.dev requests",
+      });
+    }
+  }
 };