Messaging · SMS

SMS API and gateway for OTPs, alerts and campaigns.

Send OTPs, alerts, and marketing messages worldwide, with carrier-grade routing, smart fallback, sender registration handled per country, and operator-level redundancy. One integration covers SMS, WhatsApp, and RCS through the Unified Messaging API.

Carrier-grade routing · Compliance per country · 50+ countries · OTPs · Alerts · Marketing · Smart fallback

Send your first SMS in minutes

Authenticate with your App ID and Key, send one request, and it's delivered. Copy, paste, run.

curl -X POST https://api.enablex.io/sms/v1/messages/ \
  -u APP_ID:APP_KEY \
  -H "Content-Type: application/json" \
  -d '{
    "from": "+44999999999",
    "to":   ["+14155550100"],
    "type": "sms",
    "campaign_id": "your-campaign-id",
    "template_id": "your-template-id",
    "data_coding": "plain"
  }'

Read the quickstart →  ·  Full SMS API reference →

50+ countries
Direct carrier routes
DLR on every message
Compliance per country

Everything a global SMS programme needs

Send SMS for OTP. Alerts. Marketing. Two-way SMS. One API, one bill, one SLA - from Mumbai to Manila to Manchester.

Authentication

OTP delivery with fallback

Tier-1 carrier routes for OTP and 2FA, with auto-fallback to voice OTP or WhatsApp if SMS fails.

Routing

Smart carrier-grade routing

Real-time route selection across direct carrier routes scores latency, cost, and deliverability per message, with auto-failover on carrier degradation.

Compliance

Compliance per country

Sender-ID and template registration handled per country, including India's DLT framework, with alphanumeric sender-IDs for 50+ countries and controls aligned with ISO 27001 and SOC 2 Type II.

Two-way

Inbound SMS & long codes

Receive SMS on dedicated long codes, short codes, and toll-free, with a webhook on every inbound, and build STOP/HELP keyword automations in minutes.

Reporting

Real-time DLR & analytics

Per-message delivery receipts arrive via webhook, alongside carrier-level deliverability dashboards and CSV and API exports for ops and finance.

Omnichannel

Cascade to WhatsApp & RCS

One API call, three channels. Try RCS first, fall back to WhatsApp, fall back to SMS, or any cascade you define. Maximum reach, minimum cost.

Built for the SMS workloads that move money and people

BFSI, insurance, retail, logistics, government: the verticals where SMS is still the channel of record.

BFSI

OTP & transaction alerts

OTP for login and payment authentication. Regulator-aligned alert flows for debit, credit, and balance updates.

Voice AI for banking
Insurance

Premium reminders & claims

Renewal reminders, policy issuance, and claim status updates with two-way reply for self-service confirmation.

Voice AI for insurance
Retail / D2C

Order & delivery alerts

Order confirmation, dispatch, and out-for-delivery SMS at scale. Promotional broadcasts with registered templates.

Retail and ecommerce
Logistics

Driver & rider notifications

Job assignment, ETA, and proof-of-delivery SMS for last-mile fleets. Two-way SMS for status updates from the field.

All solutions
Government

Citizen alerts & broadcasts

Identity OTP flows, public-service alerts, and emergency broadcasts. On-prem deployment for sovereign requirements.

Talk to sales
Healthcare

Appointments & reminders

Visit reminders, prescription refills, and lab-result notifications. HIPAA-ready controls with audit trail.

Voice AI for healthcare
Spotlight · Smart routing & compliance

Smart routing globally, compliance handled per country.

Most SMS APIs hand you a single route and hope. We score every message in real time across direct carrier routes, route on the path most likely to land, and handle sender and template registration per country, so your OTPs are routed to arrive and your marketing is not filtered as spam.

  • Real-time route scoring on latency, cost, and historical deliverability per corridor.
  • Automatic failover: carrier degradation triggers re-route within seconds, no manual intervention.
  • Registration per country handled by us. In India: principal entity, header, content template and consent under the DLT framework.
  • Sender-ID registration in 50+ countries, with alphanumeric branding everywhere it's allowed.
  • SMS → WhatsApp → voice OTP fallback so the authentication code still arrives.

Why teams build SMS on EnableX

What sets the EnableX SMS API apart.

01

Carrier-grade routing & deliverability

Direct interconnects to tier-1 carriers across 50+ countries, with real-time route scoring and automatic failover.

02

Compliance per country done for you

Sender-ID and template registration handled per country. In India, that means principal entity, header, content template and consent under DLT.

03

Full-stack: SMS + WhatsApp + RCS + Voice + Video

One platform, one bill, one SLA. Cascade automatically for omnichannel reach, with on-prem deployment available for BFSI and government.

Pricing

Pay-as-you-use SMS. No platform fee.

Per-message rates by destination and category. Volume pricing is handled by our sales team. Free trial credits included, no credit card required.

SMS API FAQs

An SMS API lets businesses send and receive text messages programmatically via their software, apps, or CRM. It enables instant, automated communication without manual intervention, perfect for OTPs, alerts, reminders, and marketing.

The EnableX SMS API allows you to send bulk messages, OTPs, alerts, reminders, and marketing campaigns at scale, integrated into your existing workflows. Smart carrier-grade routing and sender registration per country are built in.

Yes. EnableX offers global SMS coverage across 50+ countries, with region-specific compliance support including sender-ID and template registration per country (for example India's DLT framework).

We use encrypted connections and comply with industry standards to ensure data privacy, message integrity, and regulatory compliance. Sender registration per country, data-protection law and controls aligned with ISO 27001 and SOC 2 Type II are supported. Cloud, hybrid, and on-premise deployments are available.

Yes. Delivery receipts provide real-time updates on message status, so you know exactly when each SMS is delivered, failed, or pending. Webhooks push DLR events directly into your stack.

Pricing depends on your target regions, message volume, and message type (transactional vs. promotional). Refer to our SMS pricing page or contact our sales team for a custom quote with volume discounts.

Yes. EnableX's CPaaS platform supports SMS, WhatsApp, and RCS giving you a unified omnichannel strategy. Automatic failover means if RCS is not supported on a customer's device, messages cascade to WhatsApp or SMS to ensure reliable delivery.

Build with SMS API: Developer Docs

See EnableX in action.

Talk to sales, or start a free trial. No credit card required.

Free trial credits · No credit card · API keys in 2 minutes

Related guide: RCS vs WhatsApp vs SMS: 2026 decision framework