From Meta for Developers → your app → WhatsApp → API Setup: copy the Phone number ID and a permanent access token. Then add our webhook URL in the app's WhatsApp configuration.

Create a custom app in your Shopify admin (Settings → Apps → Develop apps) with read_products, read_orders and read_customers scopes, then paste the Admin API access token and webhook signing secret here. Point orders/create, orders/paid and customers/create webhooks at /api/integrations/shopify/webhook.

Create a bot with @BotFather on Telegram, copy its token, and paste it here. We'll register the webhook automatically.