Sent - Unified Messaging API for SMS, WhatsApp & RCS

One API. Every channel.

messaging_flow.ts

sent.message("Your code is 4291");

Sent API Core

Validation

PASSED

Routing Logic

OPTIMIZED

Compliance

CHECKED

SMS

RCS

Send SMS, WhatsApp, and RCS from a single integration. Sent handles routing, compliance, and content transformation so you ship faster.

Explore docs

Get Started

$npm install @sentdm/sentdm

messaging_flow.ts

sent.message("Your code is 4291");

Sent API Core

Validation

PASSED

Routing Logic

OPTIMIZED

Compliance

CHECKED

SMS

RCS

Infrastructure, not just an API.

Replace provider fragmentation with a single integration layer.

Explore docs

Get Started

Unified API

One request sends to SMS, WhatsApp, or RCS. No channel-specific code.

Service Provider

Sent API

Environment

Sandbox

Production

Default Channel Set

SMS

RCS

{
  "phoneNumber": "+19141230001",
  "customMessage": "Hello from Sent, this is a test message!",
}

View endpoint docs →

Abstraction Layer

Your app calls Sent. Sent handles providers, carriers, and per-channel quirks.

DELIVERY PATH (CONTACT)

Daniel A.+1 (914) 1...

Verified

SMS Fallback

Normalized to E.164

+1 (914) 123-0001

Carrier

AT&2 - US

Best Channel

WhatsApp (WiFi)

Clean API Design

Minimal, predictable endpoints. Works the same in every language.

import SentDm from '@sentdm/sentdm';

const client = new SentDm();

await client.messages.sendToPhone({
  phoneNumber: '+1234567890',
  templateId: '7ba7b820-9dad-11d1-80b4-00c04fd430c8',
  templateVariables: {
    name: 'John Doe',
    order_id: '12345'
  }
});

TypeScript

Python

Go

Java

C#

PHP

Ruby

Message Lifecycle Visibility

Track every message you send, from request to confirmed delivery.

Received

Queued

Sent

Delivered

ID: msg_827391...

Delivered

Provider responded 200 OK

08:21:14

Fallback not required (WA active)

08:21:15

User read message

08:22:29

The problem with legacy messaging

You want to ship features. Instead, you're managing pipes.

Fragmented Providers

Separate APIs for each aggregator, channel, and carrier. More integrations, more maintenance.

Compliance Overhead

10DLC, WhatsApp templates, opt-out rules—each channel has its own requirements.

Content Transformation

Rich media on WhatsApp, plain text fallback on SMS. You build the logic.

Cost Inefficiency

Without channel-aware routing, you default to SMS rates for every message.

How it works

Routing and delivery, handled for you.

Contact Object

Each user is stored as a delivery profile with channel preferences and availability.

Daniel A.+1 (914) 123...

Preferences

Marketing Messages

Transactional

Last contacted via WhatsApp · 2 days ago

Channel Availability Check

Sent detects which channels can reach each contact before sending.

Channel Scan: +1 (914) 123-0001

Active

SMS

Available

RCS

N/A

Direct delivery supported

No registered client

Unified Templates

Define one message. Sent transforms it for each channel automatically.

Hi {{name}},
your order {{order_id}}
is ready for pickup.

Hi Jane, your order #9921 is ready...

Sent: Hi Jane, your order #9921 is ready for pickup.

Automatic Fallbacks

When delivery fails, Sent routes to the next available channel. No extra code.

Primary: WhatsApp

Warning

WhatsApp delivery failed (timeout 3s)

System ActionFallback triggered: sending SMS copy...

SMS Delivered

Template Rendering

One template fans out into channel-specific payloads.

Template: order_ready

SMS

RCS

Compliance, handled.

Sent is a registered carrier with direct interconnects. Regulatory requirements are built in.

Certifications & Memberships

NECA OCN126L

FCC RegistrationRegistered

IPESRegistered IPES Provider

SecuritySOC 2 Type II

GDPRCompliant

Lower messaging costs

Channel-aware routing sends messages via the most cost-effective available channel. Typical savings: 30–60%.

Global reach

Send to recipients worldwide. Sent handles local carrier requirements and regulatory headers.

Ship faster

One integration replaces six. Spend time on your product, not messaging plumbing.

Pricing

Pay as you go

$0.015/ contact / month

Monthly per-contact pricing. Carrier fees passed through at cost.

Full API access

SMS, WhatsApp, RCS

Community support

Start building

Enterprise

Custom

Volume pricing, SLAs, and dedicated support for high-volume senders.

Volume discounts

24/7 priority support

Custom SLAs

Contact sales