Key Takeaways
- Node.js Android SMS gateway API: call HTTPS with Bearer + JSON. There is no official multi-language SDK product to npm-install for SMS Gateway.
- Treat 2xx as accept. Delivery follows the Android radio and carrier.
- Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Scale peak with more devices, not imaginary unmetered carrier SMS.
- Free 300 SMS lifetime is for canaries — not load tests.
- Put keys in env; rotate on staff change.
- Developer Center owns live fields.
This Node.js Android SMS gateway API guide is the depth layer for server-side sends: auth, idempotency, webhooks, and handset ops. Cornerstone patterns: JSON API example. bulk send loop. Node.js HTTP docs.
Priced by devices and SMS send volume. You use your own phone and operator SMS credit.
If your Node service “works in Postman” but the phone is offline, you do not have an API bug — you have a radio ops problem.
fetch/axios, not an official SDK
Authorization: Bearer …, POST /api/v1/messages, body { to, text }. Confirm fields in Developer Center. Do not brand a thin wrapper as a complete official SDK.
Request lifecycle
| Step | Node sees | Reality |
|---|---|---|
| POST messages | 2xx + id | Queued to device |
| App claims job | — | Needs online handset |
| SIM send | — | Operator airtime |
| DLR / webhook | Event JSON | May lag or fail |
Idempotency and retries
Retry transport timeouts with the same Idempotency-Key. New business attempts get a new key. OTP resends need a new challenge — see OTP.
Webhooks for DLR
Register endpoints, verify signatures, process async. Guide: webhooks. Parse DLR in Node.
Devices, volume, airtime
Peak OTP needs spare charged phones — multi-device. Plan SMS volume is separate from carrier prepaid/postpaid balance.
Related guides
PHP samples. C# samples. Same REST idea — not SDKs.
Checklist
- Keys only in env / secret store.
- Idempotency on writes.
- Webhook signature verified.
- OTP vs bulk device pools.
- No “official SDK” marketing in your README.
- Handset health monitored.
Next steps
Ship a canary route, 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
