Android SMS Gateway Scenario 1249: Ecommerce webhooks in practice

Summary

Ecommerce webhooks in scenario 1249 are dropship ack delays: dropship.ack_late fires, SMS with PO last-four and a window, portal for vendor codes. Unlike order.paid, restock, refund, subscription, gift-card, BOPIS, split-shipment, RMA, COD, preorder, price-match, remaining-line, warranty, loyalty expiry, backorder, invoice.corrected, donation receipt, wishlist.in_stock, try-on kit_due, or sample-sale hold_expiring, this event is a vendor clock, not a hold expiry.

Service pricing is devices plus SMS send volume. You bring the Android phone and operator SMS credit. Free is 1 device, 300 SMS lifetime, 300 contacts. Developer is 25,000 SMS per year. Starter, Professional, and Business list Unlimited SMS as platform send volume; devices and airtime stay metered.

A vendor warehouse code in SMS is a site token you leaked. Send PO last-four. Keep the code in the portal. Honor STOP.

Key takeaways

• Dropship webhooks are PO last-four and ack window — never a vendor warehouse code in SMS.
• Verify signatures before the SIM fires. A replayed dropship.ack_late is a second nag.
• Keep checkout OTP off the CX tablet that dumps ack-late bursts.
• Service pricing is devices plus SMS send volume. You bring the Android phone and operator credit.
• Free is 1 device, 300 SMS lifetime, 300 contacts. Developer is 25,000 SMS per year.
• Honor STOP. Ack-late nags are promotional even when the PO looks transactional.

Related reading

Start from two-way SMS inbox, compare device and SMS volume pricing, open transactional SMS, and review FTC advertising notes where they apply.

Context

CX desks land here after a replayed ack_late double-nagged a shopper, or after a warehouse code leaked in a “helpful” template. Checkout OTP cannot share that tablet.

Core scenario guidance

Verify signatures. Template: PO last-four + window. Drop warehouse codes. Honor STOP. Isolate OTP.

Canary a staff PO after OS updates. MCP wraps REST. Developer Center owns fields.

Cost and ownership

Devices + volume + operator airtime on every retry. Developer is 25,000 SMS per year. Free (1 / 300 / 300) proves pairing, not a dropship desk.

Operations

Daily last-seen, battery, duplicate PO ids. After a webhook secret rotate, one staff canary. On-call before unattended vendor cutoffs.

Security and compliance

Ack SMS reveal what is inbound. Encrypt at rest. Never log warehouse codes. Verify TLS on every callback.

Decision guide

Ship when signatures, last-four templates, STOP, and OTP isolation exist. Delay if a replay can double-nag. If zero phone ops is mandatory, evaluate CPaaS for that slice.

Checklist

• Verify signatures.
• No warehouse code in SMS.
• Honor STOP.
• OTP isolated.
• Spare paired.

Next steps

Return to API guide, compare device and SMS volume pricing, open device setup, and confirm APIs in SMS API documentation.

Deep dive: production hardening

Signature checks before radio are non-negotiable. Replayed ack_late still spends airtime. Battery exemptions dominate overnight vendor windows.

Deep dive: scaling and failure modes

Scale is POs times ack hours, not a blast of the catalog. Never claim unlimited free cloud SMS credits with no device or volume meter.

Deep dive: integration discipline

Developer Center owns live API parameters. Persist PO id. MCP is a REST wrapper. If zero phone ops is mandatory, evaluate CPaaS. You bring the Android phone and operator credit.