Interactive demo
Twilio Marketplace Demo
Walk the same production patterns I ship for clients: transactional SMS, Verify OTP, status callbacks, and ops escalation when delivery fails. Simulated locally — no Twilio credentials required.
Send a transactional SMS
Messaging Service → status callbacks
Simulate a freight delivery alert. In production this goes through a Messaging Service with a statusCallback URL.
Verify OTP
Twilio Verify challenge + check
Send a Verify challenge, then check a code. Tip: any 4+ digit code works in this demo (try 123456).
Status callbacks & idempotency
Twilio retries — your handler must not double-fire
Simulate a duplicate webhook delivery. Production handlers key off MessageSid so replays are safe.
Ops escalation on failure
Failed delivery → retry → page someone
When a shipment alert fails (carrier error), escalate after retries instead of failing silently.
Event log
Latest simulated Twilio-style events
No events yet — run a step above.
Independent demonstration by Kavya Gaur. This demo showcases Twilio-style messaging and Verify flows and is not affiliated with or endorsed by Twilio.