twilio-whatsapp

Purpose

Enable OpenClaw to implement and operate Twilio WhatsApp Business messaging in production:

• Send template messages (pre-approved) and session messages (24-hour customer care window).
• Attach media (images/docs/audio) with correct MIME types and size constraints.
• Receive and validate webhooks (incoming messages + message status callbacks).
• Implement opt-in/opt-out and compliance controls (STOP handling, consent logging, regional constraints).
• Operate reliably under Twilio production constraints: rate limits, retries, idempotency, error codes, and cost controls via Messaging Services.

Concrete value to an engineer: ship a WhatsApp messaging subsystem that is observable, compliant, resilient to webhook retries, and safe to run at scale with predictable failure modes.

Prerequisites

Accounts & Twilio-side setup