SMS API Gateway

Send mass text messages & MMS to customers advertising your unique products and services with our affordable SMS gateway services.

  • Highly Competitive Pricing
  • Government Grade Security
  • Capable of Voice Broadcast
  • 24/7 Customer & Tech Support
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Trusted USA Based SMS Gateway Provider

CDYNE's API SMS Gateway is Trusted by Some of The Biggest Brands in The World!

Powerful SMS Gateway Features

When you combine our SMS gateway with these awesome features, anything is possible!

Our SMS API gateway delivers the tools you need to boost company sales, revenue, customer engagement, and stay connected with your customers.

Unique 5-6 Digit Phone Number

Short Code Texting Service

Send mass text messages to customers fast from a memorable 5-6 digit phone number.

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Send cool pictures, emojis, GIFs, links to your website, and even audio messages.

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Long Code Texting Service

Send text messages from a local phone number that your recipients will know and trust.

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10DLC Capable

Get a new SMS long code solution for all of your U.S. A2P text messaging use cases.

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SMS 2 Way

Engage customers by sending & receiving bulk SMS & create powerful conversations.

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SMS Appointment Reminders

Reduce missed appointments by sending automated SMS reminders to your customers.

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Fast Texting Speeds

Schedule SMS

Schedule texting campaigns to be sent out at optimal times for higher conversions.

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Two-Factor Authentication

Send text messages to users of your application, website, or software to ensure secure logins.

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Automate your entire SMS campaign and the response customers receive after replying.

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Opt-Out Handling

Recipients can easily remove themselves from your SMS campaign with a click of a button.

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Number Pooling

Use multiple phone numbers to deliver even more text messages to your entire contact list.

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Detailed Reports

Get detailed reports on how many text messages are sent, plus more valuable data.

Why Choose CDYNE’s SMS Gateway?

We strive to be the best SMS gateway in the industry. Our trusted text gateway provides quality performance to drive your communication strategy. From integration to your first SMS campaign, we make the entire process uncomplicated.


1. World Class Support

Most gateway SMS services don't have active online support channels customers can speak to when they need it the most, and we understand. That's why we have 24/7, around the clock emergency support for our SMS gateway API service.

  • Fast Response Times
  • Fast Troubleshooting
  • Chat, Email, & Phone Support
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2. Global SMS Gateway API

Our bulk SMS gateway enables you to leverage your business communication globally without any interruptions. Don't worry about the distance! Get connectivity in more than 190 countries.

  • Tier 1 SMS Network
  • 99.9% Guaranteed Uptime

3. Government Level Security

Our gateway bulk SMS is 256 Bit Encrypted (typically only reserved for governments and militaries), SOC2 Type 2 Certified, HITRUST Certified. Hardware-based SMS servers are strategically located throughout the US-owned and operated by CDYNE.

  • 256 Bit Encrypted
  • HITRUST Certified
  • SOC2 Certified
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What are SMS Gateways?

An SMS gateway is a service that allows businesses to send and receive SMS & MMS. Businesses use them to send notifications, alerts, or other important information.

SMS gateways are very versatile and can be used for various purposes. They are perfect for sending out mass texts or sending individual texts to a large group of people. SMS gateways also allow businesses to collect customer feedback and surveys.

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I Still Don't Understand

No worries! SMS gateways can be a tricky subject. Let's delve into an example that might be easier for you to understand. You see a person wearing a cool hat, and you want to know where they got it from. But when you ask, you learn that they only speak French, while you only speak English. Thankfully, the friend you're with speaks both languages and can translate your message. In this example, you and the other person are different protocols, while your translator friend is an SMS gateway.

What Does This Have to do with SMS Notify! API?

But wait, you ask— this is all about SMS gateways, and you clicked on the product page for an SMS API. Well, CDYNE is an SMS gateway provider, and our SMS Notify! API includes all the functions of an SMS gateway for your convenience (with some extra features included).

Why the Different Name?

A rose by any other name smells just as sweet, and the same is true for an API… sort of. Okay, we're not Shakespeare, but cut us some slack. Poems aren't our thing, but we have been offering superior SMS services since 1999. And just like how an SMS gateway translates messages for different protocols, an API allows different applications to talk to each other. We expose an easy-to-use API for you to use that incorporates SMS gateway functions so that your messages are always delivered successfully.

How Does CDYNE's SMS Gateway Work?

With CDYNE's SMS gateway, you can send text messages from your website or application to over 200 countries across the globe. But we also know you want to send pictures from your latest vacation, so we made sure you can do that, too. CDYNE's SMS gateway also supports MMS messages across the U.S. How? Let us explain.

The Long and Short of It

No, we're not talking long and short codes— we're talking about our SMS gateway API, although our API does use those. The simple explanation is that our SMS API uses the DIDs or short codes assigned to your account license key to send MT and MMS messages and receive MO and MMS messages.

Want more detail?

We're happy to provide it. Here's a more in-depth explanation for how our SMS API works:

  1. Your server or application makes a CDYNE SMS Notify! API request.
  2. CDYNE replies with an API response.
  3. CDYNE sends your message to the appropriate aggregator.
  4. The aggregator delivers your message to the appropriate carrier.
  5. The carrier acknowledges receipt of your message (short codes only).
  6. The carrier delivers your message to the intended recipient's cell phone.

That's a lot of acronyms…

  • DID- a 10-digit SMS-enabled phone number used for low volume two-way texting; also called a long code.
  • Short code- a five or six-digit phone number used for mass texting.
  • MO- mobile originated; a text message that originated from a mobile device; an incoming SMS message.
  • MT- mobile terminated; a text message that terminates on a mobile device; an outgoing SMS message.
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Simple SMS Gateway Documentation

We know that implementing an SMS gateway service into your business takes time. That's why we made our documentation easy to understand and implement into all of your projects!

You'll have no problem connecting with the SMS gateway API using any programming language capable of REST or SOAP calls, as it was created by developers who wanted nothing more than making sure you could get up and running quickly without having trouble understanding what is happening or how things work underneath the hood.

Build Your Apps Faster

  • Uncomplicated API References
  • Code in Multiple Programming Languages
  • Technical Customer Support
  • Helpful FAQ Section for Dev
SMS Gateway Documentation

The CDYNE Difference

Since the early 2000s, CDYNE's been one of the industry's most trusted SMS gateway providers.

The truth is we do things differently. Our vision is to shape your connections to the world through reliable, usable, and adaptable Communication and Data APIs.

24/7 Support Lowest Pricing Multiple Service Channels

What Our Customers Have to Say

We’ve been rated 5 out 5 stars on Capterra, GetApp, Google and Facebook – based on 40+ reviews.

Popular SMS Gateway Use Cases

With our easy-to use SMS gateway API, you can programmatically add SMS campaigns or set up autoresponders with just a few lines of code.

Send discounts & offers that advertise your products and services to push subscribers to become customers.

Example: Want to give the love of your life a special Valentine’s Day gift? For 24 hours, our VIP text subscribers can get 15% off all flowers. Your significant other awaits you:
Learn what your customers think about your products, services, and company as a whole to resolve their issues and improve business.

Example: Hi Jerome, you recently bought your new cellphone, can you tell us how often you’re using it? Your feedback is very important to us. Cheers, ABC Mobile.
Entice your customers with opportunities to win prizes and discounts on your products and services.

Example: Thanks for entering for a chance to win a FREE 60 minute massage!
Easily send time-sensitive alerts to your customers to let them know about important events like fraud, weather alerts, company updates and so much more.

Example: Please take shelter. Lock your doors and windows. A category 3 hurricane is headed towards your location in Chesapeake, VA around 1:00pm EST. Await further info. Check for more info.
Put an end to no-shows by sending scheduled text messages to be sent before both parties meet.

Example: Hi Matthew. Your dental appointment at 123 Teeth is on 2/18/2022 at 3:00pm. Reply C to confirm or stop to end all text messages.
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SMS Gateway FAQ

Get all of your SMS gateway API questions answered here.

An SMS gateway is a service that allows businesses to send and receive text messages. It can be used to send notifications, alerts, or other important information.
An SMS gateway API is a web service that allows you to send and receive text messages. Businesses can use it to send messages to a mobile phone or an email address. The SMS gateway API provides a way to send messages from your application or website.
Businesses can integrate an SMS gateway into a website in a few different ways. One way is to use an SMS gateway provider's web-based SMS interface. This is usually the easiest way to get started, as the provider will likely offer detailed instructions on setting it up. Another way to integrate an SMS gateway is to use an SMS gateway API. This can be more complicated to set up but offers more flexibility regarding how the SMS gateway is used.
You can integrate CDYNE’s SMS gateway in PHP by following the directions located in our SMS API documentation.
You can integrate CDYNE’s SMS gateway in Java by following the directions located in our SMS API documentation.
You can set up a bulk SMS API into your business by choosing between a short code or long code phone number to send your messages from, then going through the application process of getting your number approved (specifically for short code numbers). Once completed, you will receive a license key to connect to the SMS gateway and send mass SMS & MMS messages to your customers.
SMS gateway providers allow businesses to send and receive text messages. This can be done through a web-based portal or through an application.
You can integrate CDYNE’s SMS gateway in ASP.NET by following the directions located in our SMS API documentation.
A bulk SMS gateway is a system that allows businesses to send large volumes of text messages to their customers.
You can set up a SMS gateway into your business by choosing between a short code or long code phone number to send your messages from, then going through the application process of getting your number approved (specifically for short code numbers). Once completed, you will receive a license key to connect to the SMS gateway and send mass SMS & MMS messages to your customers.
An SMS gateway software allows businesses to send and receive text messages. It is a computer program that provides the interface between an organization's messaging system and the public telephone network. SMS gateway software is used to automate sending and receiving text messages. SMS gateway software sends mass text messages, SMS marketing, automated notifications, and more.
Technically you can't find a phone number for your SMS gateway. Instead, you can choose between a short code or a long code phone number. When choosing a short code, you can pick between a random short code which is a random 5-6 digit phone number, or a vanity SMS short code which is a 5-6 digit phone number you choose (example: 711-711) would be used for the company "711". Or, you can choose a long code phone number, a 10-digit number. These phone numbers can be locally based by zip code.
You can send text messages from an SMS gateway by connecting to an SMS gateway API through your website, software, application, or CRM integration.

Explore Our SMS Gateway Blog Topics

The CDYNE blog has the latest content for all of your SMS gateway API needs.

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