I need a fully-functional webhook inside the Meta Developer platform that connects to my WhatsApp Business account and fires only when a message is received. The job covers everything from configuring the Meta app and subscription, through token verification, to delivering a small, well-documented endpoint that I can drop onto my own server (language is your choice, as long as it uses standard REST practices). Deliverables • Meta app configured with the “message received” WhatsApp webhook subscription • HTTPS endpoint source code that handles the GET verification challenge and POST payloads, then logs or echoes the raw JSON so I can extend it later • Clear, step-by-step setup notes (app settings, callback URL, token placement) so I can recreate the flow in another environment if needed When you apply, link to past work showing similar Meta or WhatsApp API integrations—this is the one detail I’ll use to shortlist quickly.