MESSAGING API

Send SMS and MMS that reach every customer fast.

The Messaging API sends and receives SMS and MMS, one by one or in bulk, with delivery receipts. You resell it as your own, and MCM AI replies to inbound texts for your customers.

Get API accessRead the docs
  • SMS + MMS, one endpoint
  • Delivery receipts
  • AI replies in 30+ languages
New message
To+1 415 555 0199

Add media66 / 160 Send
Accepted
202 · queued
Sent
to carrier
Delivered
0.9s
menu.jpg
MMS · 184 KB
message.delivered
200 OK
01Why teams build on it

Two-way texting, bulk campaigns and AI replies, in one API.

01 / 03

Two-way texting

Send, receive and reply on the same business number.

02 / 03

Bulk made simple

Queue big campaigns with one request and track every send.

03 / 03

AI replies instantly

MCM AI answers inbound texts and hands off when needed.

02One endpoint

SMS and MMS together

Send text, images and rich media from one endpoint. Your customers run alerts, reminders, promotions and support threads, all from numbers your developers buy and manage by API.

N
Your brand
Text message
Your table is ready 🍽️
MMS
menu.jpg · 184 KB
Delivered
Text message
send-message.http
POST /2026-01/messages
{ "to": "+14155550199",
  "body": "Your table is ready 🍽️",
  "media_url": "https://yourapp.com/menu.jpg" }
→ 202 { "status": "accepted" }
03Bulk sends

Bulk sends with receipts

Launch large campaigns in one call and get a delivery receipt for each message. Your customers see what landed, what failed and why, so every campaign keeps getting better.

campaign · spring-remindersScheduled delivery · 9:00 AM recipient time0%
Queued Sent Delivered Failed
Queued
119
Sent
1
Delivered
0
Failed
0
Per message receipts
  • waiting for the first receipt…
04AI conversations

MCM AI conversations

Point inbound texts at MCM AI and it chats back in 30+ languages, answers common questions, books appointments and passes tricky threads to a live agent with full context.

Instant AI replies Live agent handoff Thread summaries
Conversations
Hola, ¿puedo cambiar mi cita de mañana? ES
¡Claro, María! Tengo libre a las 10:30 o a las 14:15. ¿Cuál prefieres?
A las 14:15. Y necesito la factura a nombre de mi empresa.
Reservado para las 14:15. Para la factura te paso con un compañero.
Handed off to a live agent · full thread attached
05One text, end to end

From a customer’s text to a confirmed webhook.

  1. Customer

    Texts the business number asking to move tomorrow’s appointment.

  2. MCM AI

    Reads the message, checks the calendar and offers open times.

  3. MCM AI

    Confirms the new time and sends a reminder text automatically.

  4. Developer

    Gets a delivery receipt and conversation event through the webhook.

    POST https://yourapp.com/sms
{ "event": "message.delivered",
  "conversation": "conv_81f" }
Testimonials

What clients say after 90 days.

Real teams, real numbers — from sales floors, CX desks, and support queues.

“We tried three cloud phone tools before this one. The reason we stayed is boring — it just kept working across four time zones. Our sales team stopped thinking about the phone.”

Arjun Mehta

Head of Growth · Chennai

“The mid-shift dashboard is where I actually spend my day. Queue depth, agent load, and sentiment on one screen — I can coach someone before it turns into a bad review.”

Rachel Monroe

CX Manager · Denver

“AI covers overflow calls in Hindi and English, so we stopped losing weekend leads. It's not perfect — it hands off to us on anything ambiguous — but for hours and bookings, it beats voicemail every time.”

Priya Nair

Support Lead · Bengaluru

“HubSpot sync is quiet infrastructure. Every call, note, and recording just shows up on the contact — nobody has to remember to log it. That's why our forecast is finally accurate.”

Daniel Carter

Head of Sales · Chicago

“I set the whole thing up on my phone during a delayed flight. Six people, three countries, one number that rings all of us. My old provider needed a two-week onboarding for the same thing.”

Neha Iyer

Founder · Mumbai

“Porting 40 numbers across three countries was the part I dreaded most in the migration. It was done in a week, free, and I only had to sign one form. That set the tone for the rest of the rollout.”

Sophie Laurent

COO · Paris

+24%

First Contact Resolution

11 hrs

Per week returned to sales

−38%

Average Handle Time

FAQ

The questions teams ask on the first call.

Does the API support two-way messaging?expand_more

Yes. Inbound texts arrive by webhook, and your customers can reply from the same number.

How do delivery receipts work?expand_more

Each message returns a status update by webhook, so your customers always know what was delivered.

Can MCM AI answer texts for my customers?expand_more

Yes. MCM AI replies in 30+ languages and hands off to a live agent whenever needed.

Can I send MMS as well as SMS?expand_more

Yes. Images and rich media go out through the same endpoint as plain text.

Ready to build with the Messaging API?

Talk to our partner team and launch SMS and MMS under your own brand.

Get API AccessTalk to Sales
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