Skip to main content
SmsManager is a cloud messaging platform built for developers and businesses that need reliable, programmable communication across multiple channels. With a single API key and a straightforward HTTP interface, you can send messages via SMS, Viber, and WhatsApp — individually or as part of automated fallback chains — without managing separate provider integrations.

​
What is SmsManager?

SmsManager provides a unified API for multi-channel messaging. Instead of integrating with each channel separately, you send one request to SmsManager and the platform handles routing, delivery, and fallback logic on your behalf. Key capabilities include:
  • Single and batch sending — send to one recipient or up to 10 per request; use the /messages batch endpoint to send up to 10 requests (100 recipients) in a single HTTP call
  • Multi-channel flows — define a priority-ordered list of channels (e.g. Viber → SMS) using the flow property; SmsManager automatically falls back to the next channel if delivery fails
  • Delivery webhooks — receive real-time HTTP callbacks whenever a message is delivered, fails, or generates an inbound reply
  • Phone number verification — verify phone numbers with one-time passcodes (OTP) through the dedicated Verify API
  • Scheduling — send messages at a future date/time using the datetime field, with optional delivery-window constraints

​
API surfaces

SmsManager exposes four APIs, each purpose-built for a different part of your integration.

JSON API v2

The primary API for sending messages. Supports SMS, Viber, and WhatsApp (text and templates). Base URL: https://api.smsmngr.com/v2

REST API

Account and key management. Create sub-keys, set callback URLs, and retrieve account info. Base URL: https://rest-api.smsmngr.com/v1

Verify API

Generate and validate one-time passcodes for phone number verification and 2FA flows.

WhatsApp Partner API

Programmatically onboard and manage WhatsApp Business Accounts for your platform or end customers.

​
How it works

Getting started with SmsManager takes three steps:
  1. Get your API key — log in to app.smsmanager.com/api-cloud and copy your key. You can also create scoped sub-keys through the REST API.
  2. Send a message — make a POST request to https://api.smsmngr.com/v2/message with your recipient’s phone number and message body. Add a flow array to enable Viber or WhatsApp delivery.
  3. Receive a webhook — optionally pass a callback URL in your request body. SmsManager will POST a delivery notification to that URL when the message status changes.

​
Next steps

Quickstart

Follow a step-by-step guide to send your first message in under 5 minutes.

Authentication

Learn how to obtain and securely use your API key in every request.