Key Takeaways
- Scenario 540 is a veterinary surgery desk: NPO and check-in OTP for anesthesia holds. Grooming and vaccine walk-ins sit behind that queue — not a salon color-slot or a telehealth join code.
- If the surgery OTP stalls, the next elective wash does not jump the chair. Priority is the anesthetist, not inbox order.
- Do not SMS the procedure or the pet’s condition. Time, clinic gate, and how to cancel.
- Staff roster OTP stays on another device.
- 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.
Android SMS gateway scenario 540 is a small-animal surgery morning. Owners get a 05:30 NPO reminder and a check-in OTP at the gate. The same number may also send “your wash is ready.” Those are different queues. Deposit holds and class-pack OTPs are the wrong list.
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. OTP queues · Developer Center. GSMA.
Surgery OTP, not a wash
Map OTP to the surgery booking id. Expire it when the animal is in recovery or the owner cancels NPO. Do not reuse digits for a later nail trim.
If the wash OTP arrives before the surgery code, you trained the queue to lie about who is in the chair.
Anesthesia vs grooming
| Lane | Body | Priority | Device |
|---|---|---|---|
| NPO + gate OTP | Digits, arrive-by | Highest | Surgery modem |
| Groom ready | Pickup window | After holds | Same SIM ok |
| Staff roster OTP | Digits | Auth | Dedicated |
Caps: 2 / 5 / 15.
Priority is the chair
One in-flight surgery OTP per booking. REST: PHP, C#. MCP wraps REST.
No procedure names
No “spay,” no drug list. Identity on inbound if they reply STOP FOOD.
Devices and airtime
Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free: 300 lifetime. Developer: 25,000 SMS per year. Pricing.
05:30 NPO reminder
Pet vs owner
Log booking id + OTP hash, not the chip number in chat. Rotate keys. Not a CodeCanyon vet pack.
Starve the groom lane
If you will not hold wash SMS behind anesthesia, do not share the modem.
Checklist
- Surgery class first.
- OTP expires at recovery or cancel.
- No procedure in templates.
- Staff OTP elsewhere.
- Webhook signatures.
Next steps
Seed a late surgery OTP against a groom burst; prove the chair still wins. Downloads · Docs.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- OTP and 2FA SMS on AndroidAuthentication flows
- multi-device and dual SIM routingCapacity and failover
- SMS delivery reports (DLR)Delivery status tracking
- SMS API documentationLive endpoint reference
