diff --git a/functions/scripts/runtimeConfig/model.ts b/functions/scripts/runtimeConfig/model.ts
index 420400fbaa..74ebc7eb2f 100644
--- a/functions/scripts/runtimeConfig/model.ts
+++ b/functions/scripts/runtimeConfig/model.ts
@@ -21,4 +21,7 @@ export const runtimeConfigTest: configVars = {
   prerender: {
     api_key: 'fake_prerender_key',
   },
+  migration: {
+    api_key: 'fake_migration_key',
+  },
 }
diff --git a/functions/src/Utils/migration.utils.ts b/functions/src/Utils/migration.utils.ts
new file mode 100644
index 0000000000..1dc9e60ac5
--- /dev/null
+++ b/functions/src/Utils/migration.utils.ts
@@ -0,0 +1,31 @@
+import { CONFIG } from '../config/config'
+
+export function migrationEnabled() {
+  switch (CONFIG.deployment.site_url) {
+    case 'https://dev.onearmy.world':
+    case 'https://dev.community.projectkamp.com':
+    case 'https://dev.community.fixing.fashion':
+      return true
+    default:
+      return false
+  }
+}
+
+export function migrationProject() {
+  switch (CONFIG.deployment.site_url) {
+    case 'https://dev.onearmy.world':
+      return 'dev_pp'
+    case 'https://community.preciousplastic.com':
+      return 'prod_pp'
+    case 'https://dev.community.projectkamp.com':
+      return 'dev_pk'
+    case 'https://community.projectkamp.com':
+      return 'prod_pk'
+    case 'https://dev.community.fixing.fashion':
+      return 'dev_ff'
+    case 'https://community.fixing.fashion':
+      return 'prod_ff'
+    default:
+      return null
+  }
+}
diff --git a/functions/src/config/config.ts b/functions/src/config/config.ts
index 1722306ea6..0eaf800b43 100644
--- a/functions/src/config/config.ts
+++ b/functions/src/config/config.ts
@@ -21,6 +21,9 @@ if (Object.keys(c).length === 0) {
         slack_webhook: 'http://simulated-webhook-receiver:30102/slack',
       },
       service: null,
+      migration: {
+        api_key: 'fake_key',
+      },
     } as any
   } else {
     c = {
diff --git a/functions/src/index.ts b/functions/src/index.ts
index 2aff161dd8..206d8fc41e 100644
--- a/functions/src/index.ts
+++ b/functions/src/index.ts
@@ -17,6 +17,8 @@ exports.aggregations = require('./aggregations')
 
 exports.database = require('./database')
 
+exports.supabaseCreateAuthUser = require('./supabaseMigration')
+
 exports.userUpdates = UserUpdates.handleUserUpdates
 
 exports.discussionUpdates = DiscussionUpdates.handleDiscussionUpdate
diff --git a/functions/src/supabaseMigration/createAuthUser.ts b/functions/src/supabaseMigration/createAuthUser.ts
new file mode 100644
index 0000000000..384b5ed4eb
--- /dev/null
+++ b/functions/src/supabaseMigration/createAuthUser.ts
@@ -0,0 +1,42 @@
+// Import Firebase Functions and Admin SDK
+import * as functions from 'firebase-functions'
+import axios from 'axios'
+import { migrationEnabled, migrationProject } from '../Utils/migration.utils'
+import { CONFIG } from '../config/config'
+
+const MIGRATION_API = 'https://supabase-migration-api.fly.dev/migration'
+const MIGRATION_API_KEY = CONFIG.migration.api_key
+
+async function sendToSupabase(userDoc) {
+  try {
+    const response = await axios.post(`${MIGRATION_API}/auth`, userDoc, {
+      headers: {
+        'x-api-key': MIGRATION_API_KEY,
+      },
+    })
+
+    console.log('User synced with Supabase')
+    // console.log('User synced with Supabase:', response.data)
+    // return response.data
+  } catch (error) {
+    console.error(
+      'Error syncing user with Supabase:',
+      error.response?.data || error.message,
+    )
+    throw new Error('Failed to sync user with Supabase')
+  }
+}
+
+// Firebase function triggered on user creation
+exports.default = functions.auth.user().onCreate((user) => {
+  if (!migrationEnabled) return
+  const userDoc = {
+    uid: user.uid,
+    project: migrationProject,
+    email: user.email,
+    doc: user,
+  }
+  console.log('Sending new user to supabase')
+  // console.log('Sending new user to supabase:', JSON.stringify(userDoc))
+  return sendToSupabase(userDoc)
+})
diff --git a/functions/src/supabaseMigration/index.ts b/functions/src/supabaseMigration/index.ts
new file mode 100644
index 0000000000..a2abc6c1bd
--- /dev/null
+++ b/functions/src/supabaseMigration/index.ts
@@ -0,0 +1 @@
+exports.createAuthUser = require('./createAuthUser')
diff --git a/shared/models/config.ts b/shared/models/config.ts
index 283e9bdf51..cea6f04783 100644
--- a/shared/models/config.ts
+++ b/shared/models/config.ts
@@ -34,4 +34,7 @@ export interface configVars {
   prerender: {
     api_key: string
   }
+  migration?: {
+    api_key: string
+  }
 }