Key Takeaways
- Send SMS with Go via an Android gateway: net/http or a thin client with Bearer + JSON. There is no official Go module SDK product from SMS Gateway.
- 2xx is accept. Delivery follows the handset radio and your operator.
- Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Peak = more devices, not unmetered carrier SMS.
- Free 300 SMS lifetime is for canaries.
- Keys from env; cancel contexts on timeout.
- Developer Center owns live fields.
This send SMS with Go guide targets Android SIM gateways over HTTPS — idiomatic net/http, timeouts, and idempotency. Related: JSON API example. Node.js API guide. Go net/http.
Priced by devices and SMS send volume. You use your own phone and operator SMS credit.
A fast Go loop without sleep is still bounded by one radio — and by the prepaid balance in the tray.
net/http — not an official SDK
POST /api/v1/messages with { to, text }. Confirm fields in Developer Center. Do not market a wrapper as a complete official SDK.
Request lifecycle
| Step | Go sees | Reality |
|---|---|---|
| POST messages | 2xx + id | Queued to device |
| App claims job | — | Online handset required |
| SIM send | — | Operator airtime |
| Webhook / GET | Status JSON | DLR may lag |
Context, retries, Idempotency-Key
Pass context.WithTimeout. Retry transport errors with the same Idempotency-Key. New OTP challenges get new keys — OTP.
DLR and inbound
Verify signatures in a small HTTP handler — webhooks.
Devices, volume, airtime
Size peak with multi-device. Plan volume ≠ carrier prepaid.
Related guides
Checklist
- Keys from env only.
- Timeouts on every call.
- Idempotency on writes.
- OTP vs bulk pools.
- No official SDK claim.
- Handset health monitored.
Next steps
Canary one MSISDN, then choose devices + volume.
Related product pages
Jump to the live product docs for this topic—not another long-form article.
- SMS API documentationLive endpoint reference
- device and SMS volume pricingPlans and allowances
- Android SMS gateway product guideDefinition, product, and how to buy
- download the Android gateway appGet the APK
