diff --git a/common/package.json b/common/package.json
index 54e0e2fa..1bd67851 100644
--- a/common/package.json
+++ b/common/package.json
@@ -2,7 +2,9 @@
   "name": "common",
   "version": "1.0.0",
   "private": true,
-  "scripts": {},
+  "scripts": {
+    "verify": "(cd .. && yarn verify)"
+  },
   "sideEffects": false,
   "dependencies": {
     "lodash": "4.17.21"
diff --git a/functions/package.json b/functions/package.json
index 49352969..0b012401 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -15,7 +15,8 @@
     "db:update-local-from-remote": "yarn db:backup-remote && gsutil rsync -r gs://$npm_package_config_firestore/firestore_export ./firestore_export",
     "db:backup-local": "firebase emulators:export --force ./firestore_export",
     "db:rename-remote-backup-folder": "gsutil mv gs://$npm_package_config_firestore/firestore_export gs://$npm_package_config_firestore/firestore_export_$(date +%d-%m-%Y-%H-%M)",
-    "db:backup-remote": "yarn db:rename-remote-backup-folder && gcloud firestore export gs://$npm_package_config_firestore/firestore_export/"
+    "db:backup-remote": "yarn db:rename-remote-backup-folder && gcloud firestore export gs://$npm_package_config_firestore/firestore_export/",
+    "verify": "(cd .. && yarn verify)"
   },
   "main": "lib/functions/src/index.js",
   "dependencies": {
diff --git a/functions/src/api.ts b/functions/src/api.ts
index 31f14257..36b63692 100644
--- a/functions/src/api.ts
+++ b/functions/src/api.ts
@@ -137,11 +137,11 @@ export const validate = <T extends z.ZodTypeAny>(schema: T, val: unknown) => {
 
 export const newEndpoint = (methods: [string], fn: Handler) =>
   functions.runWith({ minInstances: 1 }).https.onRequest(async (req, res) => {
-    await applyCors(req, res, {
-      origin: [CORS_ORIGIN_MANIFOLD, CORS_ORIGIN_LOCALHOST],
-      methods: methods,
-    })
     try {
+      await applyCors(req, res, {
+        origin: [CORS_ORIGIN_MANIFOLD, CORS_ORIGIN_LOCALHOST],
+        methods: methods,
+      })
       if (!methods.includes(req.method)) {
         const allowed = methods.join(', ')
         throw new APIError(405, `This endpoint supports only ${allowed}.`)
diff --git a/functions/src/health.ts b/functions/src/health.ts
new file mode 100644
index 00000000..944f8677
--- /dev/null
+++ b/functions/src/health.ts
@@ -0,0 +1,11 @@
+import { newEndpoint } from './api'
+
+export const health = newEndpoint(['GET'], async (_req, [user, _]) => {
+  return {
+    message: 'Server is working.',
+    user: {
+      id: user.id,
+      username: user.username,
+    },
+  }
+})
diff --git a/functions/src/index.ts b/functions/src/index.ts
index f18b6109..81ea59e5 100644
--- a/functions/src/index.ts
+++ b/functions/src/index.ts
@@ -3,6 +3,7 @@ import * as admin from 'firebase-admin'
 admin.initializeApp()
 
 // export * from './keep-awake'
+export * from './health'
 export * from './transact'
 export * from './place-bet'
 export * from './resolve-market'
diff --git a/package.json b/package.json
index ecefc755..a5c1e29e 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,9 @@
     "functions",
     "web"
   ],
-  "scripts": {},
+  "scripts": {
+    "verify": "(cd web && npx prettier --check .; yarn lint --max-warnings 0; tsc --pretty --project tsconfig.json --noEmit); (cd common && npx eslint . --max-warnings 0); (cd functions && npx eslint . --max-warnings 0; tsc --pretty --project tsconfig.json --noEmit)"
+  },
   "dependencies": {},
   "devDependencies": {
     "@typescript-eslint/eslint-plugin": "5.25.0",
diff --git a/web/package.json b/web/package.json
index 3e638906..889265c9 100644
--- a/web/package.json
+++ b/web/package.json
@@ -13,7 +13,8 @@
     "start": "next start",
     "lint": "next lint",
     "format": "npx prettier --write .",
-    "postbuild": "next-sitemap"
+    "postbuild": "next-sitemap",
+    "verify": "(cd .. && yarn verify)"
   },
   "dependencies": {
     "@headlessui/react": "1.6.1",