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SMS API

Send and receive SMS or MMS globally with the Telnyx Messaging API, our award-winning platform recognized as a leader for its results and ease of use.

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Channels:10DLCToll-freeShort codeAlphanumeric Sender ID
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1.3B+Messages sent and received monthly

#1Ranked API for Results and Ease of Use

130+Countries with numbers

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WHY TELNYX

Why leading companies choose Telnyx SMS API

  • Developer friendly

    Developer friendly

    REST APIs, comprehensive docs, SDKs in 5 languages, and award-winning 24/7 support. Go from first message to production in minutes.

  • Cost efficient pricing

    Cost efficient pricing

    Usage-based pricing with no hidden fees, no third-party markups, and no upfront investment. Typical savings of 30% vs other CPaaS providers.

  • Billion-scale reliability

    Billion-scale reliability

    One of the world's only billion-scale Messaging APIs. Automated queuing, intelligent encoding, and reliable delivery reports built in.

FEATURES

SMS API with automated optimization and reporting

Whether it’s detailed, transparent delivery reports or automated delivery optimizations, our billion-scale Messaging API is built to take you from small to massive with ease.

  • Message queuing

    Our automated message queuing is set based on your account limits and the latest industry standards, ensuring maximum throughput without compromising delivery or compliance.

  • Reliable delivery reports

    Measure deliverability with greater transparency than the competition using our detailed reports and debugging tool.

  • Automatic opt-outs

    If a customer replies to a message from the Telnyx API with a “stop word” message (e.g. STOP), Telnyx will automatically unsubscribe them from future sends.

  • Message concatenation

    If a SMS is too long for its destination, our API will automatically separate it into two messages. No more breaking out content into parts—we’ll handle that for you.

  • Use existing numbers to send SMS

    Have an existing, well-known number that you want to send SMS from? With Telnyx Hosted SMS, you can send and receive SMS and MMS without even changing providers.

  • Intelligent message encoding

    We support any character set and language type. Our system automatically chooses the most compact encoding possible, minimizing cost per send.

“We have the ability to offer our services at scale through Telnyx… Telnyx works closely with us, making sure we're always connected and ready to send.”

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HOW IT WORKS
Talk to an expert
SMS API FOR DEVELOPERS

Send your first message in minutes

With Telnyx REST APIs and SDKs in 5 languages, you can send and receive SMS globally with detailed delivery reports and 24/7 free support.

Send SMS cURL

curl -X POST https://api.telnyx.com/v2/messages \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "from": "+15551234567",
    "to": "+15559876543",
    "text": "Hello, world!"
  }'

Send SMS Python

import os
from telnyx import Telnyx

client = Telnyx(
    api_key=os.environ.get("TELNYX_API_KEY"),
)

response = client.messages.send(
    from_="+15551234567",
    to="+15559876543",
    text="Hello, world!"
)

print(response.data)

Send SMS Node.js

import Telnyx from 'telnyx';

const client = new Telnyx({
  apiKey: process.env['TELNYX_API_KEY'],
});

const response = await client.messages.send({
  from: '+15551234567',
  to: '+15559876543',
  text: 'Hello, world!'
});

console.log(response.data);

Send SMS Ruby

require "telnyx"

client = Telnyx::Client.new(api_key: ENV["TELNYX_API_KEY"])

response = client.messages.send_(
  from: "+15551234567",
  to: "+15559876543",
  text: "Hello, world!"
)

puts(response)
Telnyx Agent Skills

Build faster with AI

Telnyx Agent Skills provides pre-built tools for AI coding agents like Claude Code, Cursor, and Windsurf to integrate with the Telnyx Messaging API in minutes. Available in Python, JavaScript, Go, Java, and Ruby. Let your AI coding assistant write Telnyx integrations. Build in minutes.

Learn more
PRICING

See our SMS API pricing

Customers typically save 30% by switching to Telnyx, with lower list pricing and automatic volume discounts.

Starting at:

$0.004

Per message
See pricing
PRODUCTS

Build with SMS API

Ready to get started?

Talk to an ExpertSign up

FAQ

An SMS API (or SMS Gateway API) is a software interface that allows developers to build code that can send and receive SMS messages using an Application Programming Interface (API).

Resources, Docs, Support

sms api hub

  • Article icon

    Send a Message on the Telnyx Platform | Telnyx

    A short description of this page

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  • Article icon

    Receive SMS and MMS | Telnyx

    inbound SMS or MMS

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  • Article icon

    Authentication V2 | Telnyx

    Telnyx's Developer documentation provides all the information needed to get started with our platform, including authentication methods.

    Read more
  • Article icon

    Messaging APIs | Telnyx

    With the Messaging family of products, you can send and receive SMS/MMS messages from your apps, facilitate interaction with The Campaign Registry (TCR) for 10DLC compliance, and more!

    Read more
  • Article icon

    Send a message API | Telnyx

    Send a message with a Phone Number, Alphanumeric Sender ID, Short Code or Number Pool.

    Read more
  • Article icon

    List messaging profiles API | Telnyx

    List messaging profiles

    Read more
  • Article icon

    Retrieve a message API | Telnyx

    Note: This API endpoint can only retrieve messages that are no older than 10 days since their creation. If you require messages older than this, please generate an MDR report.

    Read more
  • Article icon

    Send a message API V1 | Telnyx

    Sends a message by submitting an outbound message request.

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  • Article icon

    Learn about the powerful features of the Telnyx SMS API

    What is an SMS API? Dive into the world of real-time messaging, which connects apps to telecom networks, and discover its potential for your business.

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  • Article icon

    Send SMS With Telnyx Python SDK

    Sending SMS With Telnyx Python SDK is as Easy as API. Get started sending impactful customer messaging today.

    Read more
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    How to boost customer engagement with SMS

    Learn how SMS customer engagement drives meaningful interactions with tailored strategies, real-time updates, and personalized communication.

    Read more
  • Article icon

    Telnyx - How to Ensure Compliance With SMS Regulations.

    There are regulations that dictate how organizations can interact with end users via text. Understand what the rules are & how to comply with them.

    Read more
  • Article icon

    Mass text messaging: How to get started with Telnyx

    Learn the advantages of mass text messaging for business and how to send messages in bulk with the Telnyx SMS API.

    Read more
  • Article icon

    SMS & RCS: Complementary solutions for businesses

    Learn how SMS & RCS complement each other to create a unified messaging strategy that combines reliability with rich media engagement for business success.

    Read more
  • Article icon

    Telnyx Blog | CPaas & UCaaS Resources

    Find data-driven research, comprehensive guides and all things SIP trunking, voice and SMS APIs, wireless and more.

    Read more
  • Article icon

    Leveraging SMS customer engagement to increase ROI - Telnyx

    Learn how SMS customer engagement can be used to deliver a positive customer experience and drive more sales.

    Read more
  • Article icon

    How to text Canada: A guide to business communications

    Master texting in Canada with our guide: Understand phone number formats, country codes, and Canadian SMS regulations.

    Read more
  • Article icon

    Telnyx vs. Twilio for SMS / Twilio SMS Alternative

    Telnyx and Twilio both offer programmable SMS messaging. But how do the two providers compare?

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    Top 5 Twilio Verify API alternatives

    Looking for the best verification API for your business? Don’t just default to Twilio Verify API. Consider some of these great options instead.

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    #1 Plivo Alternative - Telnyx vs Plivo

    The top Plivo alternative. Find out why businesses are choosing Telnyx as the better Plivo alternative for CPaaS.

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  • Article icon

    Telnyx SMS Guide | Telnyx Help Center

    Here you will find a collection of links that will explain how to build applications using our SMS offering.

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  • Article icon

    Setting Up a Messaging Profile | Telnyx Help Center

    Here we will explain how to get SMS ready with Messaging Profiles on Telnyx.

    Read more
  • Article icon

    Send a Text with the Telnyx Python SDK | Telnyx Help Center

    A quick video walking you through using the Telnyx Python SDK to send messages.

    Read more
  • Article icon

    Receiving SMS on your Telnyx number | Telnyx Help Center

    Begin your journey with Telnyx: Learn how to sign up and set up a Mission Control account effectively.

    Read more
  • Article icon

    Getting Started with Messaging | Telnyx Help Center

    Begin with Telnyx messaging: Toll-free, error codes, SDKs, and webhook utilization.

    Read more
  • Article icon

    Telnyx Messaging Error Codes | Telnyx Help Center

    This article provides a breakdown of the messaging error codes used by Telnyx and their meanings!

    Read more
  • Article icon

    SMS API | Built for CRM and Sales

    Enhance your CRM tool with our SMS API. Build customer relationships seamlessly while ensuring compliance with data and privacy restrictions.

    Read more
  • Article icon

    SMS Marketing API and Platform [Use Cases]

    Enhance your SMS marketing with Telnyx's powerful API and platform. Start optimizing your campaigns today.

    Read more