diff --git a/src/pages/api/auth.astro b/src/pages/api/auth.astro
index a6175a6..63ead9d 100644
--- a/src/pages/api/auth.astro
+++ b/src/pages/api/auth.astro
@@ -2,8 +2,7 @@
 import Layout from "../../layouts/Layout.astro"
 import { GET } from "./auth"
 
-const auth = await GET()
+const auth = await GET(Astro.url.origin)
 ---
 
-<Layout title="Authenticate" description="">
-</Layout>
+<Layout title="Authenticate" description="" />
diff --git a/src/pages/api/auth.ts b/src/pages/api/auth.ts
index e1ad1cb..c124505 100644
--- a/src/pages/api/auth.ts
+++ b/src/pages/api/auth.ts
@@ -3,9 +3,8 @@ import { create } from "../../../api/_lib/oauth2.ts"
 
 export const prerender = false
 
-export const GET = () => {
+export const GET = (host: string) => {
   const randomString = () => crypto.randomBytes(4).toString(`hex`)
-  const host = "https://mmp-site-b1c9b.web.app"
   const oauth2 = create()
 
   const url = oauth2.authorizationCode.authorizeURL({
diff --git a/src/pages/api/callback.astro b/src/pages/api/callback.astro
index 8b6f0d2..bfaf901 100644
--- a/src/pages/api/callback.astro
+++ b/src/pages/api/callback.astro
@@ -2,7 +2,7 @@
 import Layout from "../../layouts/Layout.astro"
 import { GetCallback } from "./callback"
 
-const callback = GetCallback(Astro.request)
+const callback = GetCallback(Astro.request, Astro.url.origin)
 ---
 
 <Layout title="Callback" description="" />
diff --git a/src/pages/api/callback.ts b/src/pages/api/callback.ts
index 5213ac3..bc986e1 100644
--- a/src/pages/api/callback.ts
+++ b/src/pages/api/callback.ts
@@ -1,9 +1,10 @@
 import { create, renderBody } from "../../../api/_lib/oauth2.ts"
 
-export const GetCallback = async (req: Request) => {
+export const prerender = false
+
+export const GetCallback = async (req: Request, host: string) => {
   const params = new URLSearchParams(req.url)
   const code = params.get("code") || ""
-  const host = "https://mmp-site-b1c9b.web.app"
   const oauth2 = create()
 
   try {