diff --git a/src/config/schema.ts b/src/config/schema.ts
index 6e32446..be13a88 100644
--- a/src/config/schema.ts
+++ b/src/config/schema.ts
@@ -55,6 +55,8 @@ export const configSchema = z.object({
 
       // captcha secret
       secret: z.string().min(1).optional(),
+
+      clientKey: z.string().min(1).optional(),
     })
     .default({}),
 });
diff --git a/src/routes/meta.ts b/src/routes/meta.ts
index 8f89a00..cd93525 100644
--- a/src/routes/meta.ts
+++ b/src/routes/meta.ts
@@ -23,6 +23,7 @@ export const metaRouter = makeRouter((app) => {
         name: conf.meta.name,
         description: conf.meta.description,
         hasCaptcha: conf.captcha.enabled,
+        captchaClientKey: conf.captcha.clientKey,
       };
     }),
   );