Key Takeaways
- Scenario 493 is made-to-order mill / fabric-delay webhooks — not customs holds, subscription pause, size-exchange ready, fraud-review holds, preorder slips, loyalty-points expiry, gift-wrap ready, digital downloads, pre-auth holds, custom-proof approval, line-item cancels, warranty, store credit, price-match, try-on kits, subscription skips, BOPIS, waitlist restocks, preorder drops, gift-card sales, COD, split-ship, refunds, or renewals.
- “Mill MILL-3 — fabric due 12 Nov” is transactional. “Shop leftover bolts” is marketing. Split SIMs.
- Cap SMS per mill id. ERP retries of mill.delayed will empty prepaid.
- Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free is 1 / 300 / 300. Developer is 25,000 SMS per year.
- Verify HMAC. A forged mill.delayed event nags people whose bolt already left.
- REST fields live in Developer Center — not a CodeCanyon mill plugin. MCP, if you use it, is only a REST wrapper.
Summary
Scenario 493 is ecommerce webhooks for made-to-order mill delays. The mill owns the lot id. The Android texts the shopper a due date, not a leftover-bolt blast. Priced by devices and SMS send volume. You use your own phone and operator SMS credit.
If you SMS on every ERP ping without a mill+date key, you will burn airtime on bolts that already shipped — and shoppers will treat MILL as spam.
Mill-delay confirm
Verify the webhook signature before you enqueue. Shopify overview · webhooks guide. Fields: Developer Center. Industry notes: GSMA.
Event map
| Event | Payload | SIM | Do not |
|---|---|---|---|
| mill.delayed | MILL id + due date | Transactional | Retry-SMS on ERP ping |
| mill.ready | Once per lot | Transactional | Bundle a leftover-bolt CTA |
| Leftover bolts | Promo | Promo MSISDN | Ride the mill inbox |
| Staff login | OTP | Dedicated OTP phone | Share the mill radio |
One SMS per mill hold
ERP retries. Your key is mill+date. Idempotent send. DLR ≠ ready — DLR.
Cost
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free: 1 device, 300 SMS lifetime, 300 contacts. Developer: 25,000 SMS per year. Paid plans uncap platform volume; devices still meter. Pricing.
Ops
Spare radio before a mill-delay week. Doze · setup.
Security
Separate mill secrets from gateway callbacks. Trust Center · OTP. Leftover STOP off the mill inbox. STOP.
Checklist
- HMAC required.
- Idempotency on mill+date.
- Ready events capped once.
- OTP isolated.
- Airtime for mill-delay week.
Next steps
Ecommerce templates · SMS API documentation.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- SMS webhook integrationInbound and status events
- transactional SMS for orders and alertsEvent-driven messages
- SMS API documentationLive endpoint reference
- device and SMS volume pricingPlans and allowances
