---
title: "Kambasms: SMS OTP and Transactional SMS API"
description: "Send SMS OTPs and transactional alerts to Angola’s Unitel, Movicel and Africell via REST API. 6-digit codes, 5-min validity, 3/hour limit."
canonical_url: "https://liners.com/kambasms"
markdown_url: "https://liners.com/kambasms.md"
type: "product"
language: "en"
image: "https://assets.liners.com/storage/v1/object/public/media/tools/kambasms/screenshot.webp?v=1791447486545"
published_at: "2026-10-08T14:26:04.837Z"
updated_at: "2026-10-08T18:29:24.094Z"
---

# Kambasms: SMS OTP and Transactional SMS API

Send SMS OTPs and transactional alerts to Angola’s Unitel, Movicel and Africell via REST API. 6-digit codes, 5-min validity, 3/hour limit.

## Breadcrumbs

- [Communication & Social](/categories/communication-social)
- [KambaSMS](/kambasms)

## Summary

Send OTPs and transactional SMS to Angolan numbers

A paid transactional messaging API for Angolan businesses and developers to send SMS OTPs and notifications to Unitel, Movicel, and Africell numbers.

## Product details

| Field | Value |
| --- | --- |
| Website | https://kambasms.ao/ |
| Tagline | Send OTPs and transactional SMS to Angolan numbers |
| Primary country | Angola |
| Platforms | Web, API |
| Average rating |  |
| Published reviews | 0 |
| Verified listing | No |

## About the product

KambaSMS is a transactional messaging platform for Angolan businesses, fintechs, and developers that need to send **SMS OTPs** and critical **transactional notifications** to local mobile networks via a REST API.

Key capabilities include:
- **OTP sending and verification via REST API**, including automatic **6-digit code generation** with **5-minute validity** and an **/otp/verify** endpoint
- **Angola network coverage support** for valid numbers on **Unitel, Movicel, and Africell**, subject to network availability, with automatic **+244 validation**
- **Anti-abuse controls** that limit OTP requests to **3 requests per hour per number**, plus balance checks before processing
- **Delivery status, IDs, and history** available in the dashboard and via API for tracking message state and activity

Available on **Web** (dashboard), **REST API**, and **browser extension** (Chrome and Edge) via KambaSMS Connect. SDKs are listed for **Node.js, Python, PHP, and C#**, plus a public **Postman collection**. API documentation is available at https://kambasms.ao/#docs.

It targets **B2B teams in Angola** building login verification (2FA), account recovery, payment receipts, order updates, appointment reminders, and security alerts. Promotional and marketing content is not supported and can result in account suspension without refund.

Notable in the Angolan market for its focus on **local operator routing** (Unitel, Movicel, Africell), **prepaid credits that do not expire**, local support in Portuguese, and an optional **Kamba Email** add-on for transactional email with a separate email balance.

## Features

- [Communication & Social](/categories/communication-social): Category
- [B2B](/tags/b2b): Product feature or technology
- [Messaging](/tags/messaging): Product feature or technology
- [SaaS](/tags/saas): Product feature or technology
- [Angola](/countries/angola): Market

## Related pages

- [Alternatives](/kambasms/alternatives)
- [Reviews](/kambasms/reviews)
- [Transparency](/kambasms/transparency)

## Access and citation

- [Canonical HTML page](https://liners.com/kambasms)
- [Markdown route index](/sitemap.md)
- [Agent access guide](/llms.txt)