International SMS Marketing API

Reach every phone,
in every country.

Launch international SMS marketing campaigns and transactional alerts through one REST API. 200+ countries, local routes for higher deliverability, and real-time delivery reports.

Start Sending Free View API Docs

200+ Countries

Sub-second delivery

Real-time reports

99.9% uptime

200+

Countries Covered

98.4%

Avg. Delivery Rate

<1s

Avg. Send Latency

99.9%

API Uptime

Built for scale

Everything a marketing team needs to text the world

One API. Every carrier route. No spreadsheets.

Instant Delivery

Messages route through local carrier connections in the destination country for faster, more reliable delivery.

Secure by Default

API-key authentication, encrypted transport, and per-key rate limits keep your sending account protected.

Global Reach

Send to 200+ countries with automatic number formatting, sender ID handling, and local compliance rules applied.

How it works

From signup to sent, in three steps

Create your API key

Send a request

Call the /v1/sms/send endpoint with a recipient list, sender ID, and message — or upload a CSV for bulk campaigns.

Track delivery live

Watch delivery status update in real time via webhook callbacks or the dashboard, per recipient and per country.

Developer-first

A bulk send is one API call away

Send to a single number or ten thousand at once with the same endpoint. Pass a list of destinations, and the API handles routing, retries, and per-country formatting for you.

Bulk endpoint accepts up to 10,000 recipients per request

Webhooks for delivered, failed, and undelivered statuses

SDKs for PHP, Node.js, and Python

POST /v1/sms/bulk
Authorization: Bearer {{API_KEY}}
Content-Type: application/json

{
  "sender_id": "NEXISIM",
  "message": "Your order ships today! Track it here: nexi.link/abc123",
  "recipients": [
    "+2547XXXXXXXX",
    "+2348XXXXXXXX",
    "+9198XXXXXXXX"
  ],
  "schedule_at": null
}

200 OK
{
  "status": "queued",
  "batch_id": "batch_9f21a3",
  "recipients_accepted": 3,
  "recipients_rejected": 0
}

Use cases

Built for every kind of SMS

Marketing campaigns and critical alerts, on the same reliable rails.

Marketing campaigns

Promotions, product launches, and seasonal offers sent to segmented lists.

OTP & verification

Low-latency one-time codes for signup, login, and payment confirmation.

Transactional alerts

Order updates, delivery notices, and account activity notifications.

Two-way SMS

Collect replies — STOP requests, support questions, or survey responses.

Fair Usage & Delivery Policy

If a message fails to deliver, the credit for that message is automatically refunded to your balance. Once a message is confirmed delivered by the destination carrier, it's billed and non-refundable.

Get Your API Key

Pricing

Pay for what you send

No monthly minimums. Per-message pricing varies by destination country.

Starter

$0.008 / SMS

For testing and low-volume sending.

Pay-as-you-go, no contract

200+ country coverage

Dashboard + delivery reports

Community support

Get Started

Business

$0.005 / SMS

Volume pricing for growing campaigns.

Everything in Starter

Bulk send up to 10,000/request

Webhook delivery callbacks

Priority routing

Start Business Plan

Enterprise

Custom

For high-volume senders and platforms.

Everything in Business

Dedicated sender IDs & routes

SLA-backed uptime

Dedicated account manager

Talk to Sales

Trusted by senders

Teams sending across borders every day

Amina K.

Growth Lead, retail app

Switching our promo blasts to this API cut delivery failures in East Africa noticeably, and the dashboard makes campaign reporting simple.

David O.

Backend Engineer, fintech

Integration took an afternoon. Webhooks make it easy to reconcile delivery status against our own order records.

Priya N.

Marketing Ops Manager

We run campaigns across four regions from one account now instead of juggling separate local providers.

FAQ

Common questions

Coverage spans 200+ countries with local carrier routes. You can check live coverage and per-country pricing from the Coverage page before you launch a campaign.

No. Pricing is pay-as-you-go per message. Business-tier rates apply automatically once your monthly volume crosses the qualifying threshold — no manual plan switch needed.

Most messages leave our platform in under a second. Final delivery time to the handset depends on the destination carrier, and is reported back via webhook or the dashboard.

Yes. STOP-word handling is built in for supported countries, and opt-outs are enforced automatically across future sends to that number.

Start sending SMS worldwide with NEXISIM

Free sandbox credits included. No credit card required to get an API key.

Create Free Account

Reach every phone, in every country.